1
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Li L, Li J. Solvent- and Catalyst-Free Synthesis of gem-Difluorinated and Polyfluoroarylated Compounds with Nucleophilic or Electrophilic Fluorine-Containing Reaction Partners, Respectively. Molecules 2024; 29:697. [PMID: 38338440 PMCID: PMC10856203 DOI: 10.3390/molecules29030697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 01/25/2024] [Accepted: 01/29/2024] [Indexed: 02/12/2024] Open
Abstract
A novel, efficient and environmentally friendly solvent-free and catalyst-free approach for the synthesis of structurally diverse gem-difluorinated and polyfluoroarylated derivatives with readily available nucleophilic and electrophilic fluorine-containing reaction partners, difluoroenoxysilane and pentafluorobenzaldehyde, is described. This neat protocol is induced by the direct hydrogen-bond interactions between fluorinated and non-fluorinated reactants without the use of heavy metal catalysts or volatile organic solvents and with no need for column chromatographic separation for most cases.
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Affiliation(s)
- Lingheng Li
- Department of Photography, Tianjin University of Technology, Tianjin 300384, China
| | - Jinshan Li
- School of Chemistry and Chemical Engineering, Hainan University, Haikou 570228, China
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2
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Zhu Y, Li W, He Z, Zhang K, Nie X, Fu R, Chen J. Catalyst-Free Cardanol-Based Epoxy Vitrimers for Self-Healing, Shape Memory, and Recyclable Materials. Polymers (Basel) 2024; 16:307. [PMID: 38337195 DOI: 10.3390/polym16030307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 12/19/2023] [Accepted: 12/24/2023] [Indexed: 02/12/2024] Open
Abstract
Bio-based vitrimers present a promising solution to the issues associated with non-renewable and non-recyclable attributes of traditional thermosetting resins, showcasing extensive potential for diverse applications. However, their broader adoption has been hindered by the requirement for catalyst inclusion during the synthesis process. In this study, a cardanol-based curing agent with poly-hydroxy and tertiary amine structures was prepared by a clean synthetic method under the theory of click chemistry. The reaction of a cardanol-based curing agent with diglycidyl ether of bisphenol A formed catalyst-free, self-healing, and recyclable bio-based vitrimers. The poly-hydroxy and tertiary amine structures in the vitrimers promoted the curing of epoxy-carboxylic acid in the cross-linked network and served as internal catalysts of dynamic transesterification. In the absence of catalysts, the vitrimers network can achieve topological network rearrangement through dynamic transesterification, exhibiting excellent reprocessing performance. Moreover, the vitrimers exhibited faster stress relaxation (1500 s at 180 °C), lower activation energy (92.29 kJ·mol-1) and the tensile strength of the recycled material reached almost 100% of the original sample. This work offers a new method for preparing cardanol-based epoxy vitrimers that be used to make coatings, hydrogels, biomaterials, adhesives, and commodity plastics in the future.
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Affiliation(s)
- Yu Zhu
- Key Laboratory of Biomass Energy and Material, Jiangsu Province, Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing 210042, China
- College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
| | - Wenbin Li
- Key Laboratory of Biomass Energy and Material, Jiangsu Province, Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing 210042, China
| | - Zhouyu He
- College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
| | - Kun Zhang
- Key Laboratory of Biomass Energy and Material, Jiangsu Province, Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing 210042, China
| | - Xiaoan Nie
- Key Laboratory of Biomass Energy and Material, Jiangsu Province, Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing 210042, China
| | - Renli Fu
- College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
| | - Jie Chen
- Key Laboratory of Biomass Energy and Material, Jiangsu Province, Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing 210042, China
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3
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Sun J, Guo Y, Xia J, Zheng G, Zhang Q. Catalyst-Free Trans-Selective Oxyiodination and Oxychlorination of Alkynes Employing N-X (Halogen) Reagents. Molecules 2023; 28:7420. [PMID: 37959838 PMCID: PMC10650761 DOI: 10.3390/molecules28217420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 10/28/2023] [Accepted: 11/02/2023] [Indexed: 11/15/2023] Open
Abstract
β-halogenated enol esters and ethers are versatile building blocks in organic synthesis, which has attracted increasing attention. In this study, we report the facile trans-oxyiodination and oxychlorination of alkynes, leading to the direct construction of versatile halogenated enol esters and ethers. This transformation features an easy operation, optimal atomic economy, a strong functional group tolerance, broad substrate scope, and excellent trans-selectivity. Employing highly electrophilic bifunctional N-X (halogen) reagents was the key to achieving broad reaction generality. To our knowledge, this transformation represents the first oxyhalogenation system employing N-X (halogen) reagents as both oxylation and halogenation sources.
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Affiliation(s)
- Jiaqiong Sun
- School of Environment, Northeast Normal University, Changchun 130117, China;
| | - Yunliang Guo
- School of Environment, Northeast Normal University, Changchun 130117, China;
| | - Jiuli Xia
- Key Laboratory of Functional Organic Molecule Design & Synthesis of Jilin Province, Department of Chemistry, Northeast Normal University, Changchun 130024, China; (J.X.); (Q.Z.)
| | - Guangfan Zheng
- Key Laboratory of Functional Organic Molecule Design & Synthesis of Jilin Province, Department of Chemistry, Northeast Normal University, Changchun 130024, China; (J.X.); (Q.Z.)
| | - Qian Zhang
- Key Laboratory of Functional Organic Molecule Design & Synthesis of Jilin Province, Department of Chemistry, Northeast Normal University, Changchun 130024, China; (J.X.); (Q.Z.)
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
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4
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Bhanja R, Bera SK, Mal P. Photocatalyst- and Transition Metal-Free Light-Induced Borylation Reactions. Chem Asian J 2023; 18:e202300691. [PMID: 37747303 DOI: 10.1002/asia.202300691] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 09/25/2023] [Accepted: 09/25/2023] [Indexed: 09/26/2023]
Abstract
The increasing global warming concerns have propelled a surge in the demand for sustainable energy sources within the domain of synthetic organic chemistry. A particularly prominent area of research has been the development of mild synthetic strategies for generating heterocyclic compounds. Heterocyclic compounds containing boron have notably risen to prominence as pivotal reagents in a myriad of organic transformations, showcasing their wide-ranging applicability. This comprehensive review is aimed at collecting the literature pertaining to borylation reactions induced by light, specifically focusing on photocatalyst-free and transition metal-free methodologies. The central emphasis is on delving into selective mechanistic investigations. The amalgamation and analysis of these research insights elucidate the substantial potential inherent in eco-friendly approaches for synthesizing heterocyclic compounds, thus propelling the landscape of sustainable organic chemistry.
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Affiliation(s)
- Rosalin Bhanja
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Odisha, 752050, India) (PM
| | - Shyamal Kanti Bera
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Odisha, 752050, India) (PM
| | - Prasenjit Mal
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Odisha, 752050, India) (PM
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5
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Constantinou CT, Gkizis PL, Lagopanagiotopoulou OTG, Skolia E, Nikitas NF, Triandafillidi I, Kokotos CG. Photochemical Aminochlorination of Alkenes without the Use of an External Catalyst. Chemistry 2023; 29:e202301268. [PMID: 37254681 DOI: 10.1002/chem.202301268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 05/25/2023] [Accepted: 05/30/2023] [Indexed: 06/01/2023]
Abstract
The niche field of photochemistry offers opportunities that are not found in "traditional" ground state chemical pathways. Aminochlorinated derivatives are an interesting family of 1,2-difunctionalised compounds that provide access to a variety of natural products and pharmaceutical active substances. A practical, catalyst-free chloroamination protocol is described herein, providing access to intermediates of great importance, utilising mild and photochemical reaction conditions (370 nm), where N-chlorosulfonamides are used as both nitrogen and chlorine sources. A wide variety of olefins, decorated with a plethora of functional groups, was tested providing excellent results (28 examples, 18-88 % yield). Mechanistic studies (UV-Vis, control experiments and quantum yield measurement) were also performed.
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Affiliation(s)
- Constantinos T Constantinou
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, 15771, Panepistimiopolis, Athens, Greece
| | - Petros L Gkizis
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, 15771, Panepistimiopolis, Athens, Greece
| | - Olga Thomais G Lagopanagiotopoulou
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, 15771, Panepistimiopolis, Athens, Greece
| | - Elpida Skolia
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, 15771, Panepistimiopolis, Athens, Greece
| | - Nikolaos F Nikitas
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, 15771, Panepistimiopolis, Athens, Greece
| | - Ierasia Triandafillidi
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, 15771, Panepistimiopolis, Athens, Greece
| | - Christoforos G Kokotos
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, 15771, Panepistimiopolis, Athens, Greece
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6
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Diprima D, Gemoets H, Bonciolini S, Van Aken K. Selective and scalable oxygenation of heteroatoms using the elements of nature: air, water, and light. Beilstein J Org Chem 2023; 19:1146-1154. [PMID: 37560135 PMCID: PMC10407787 DOI: 10.3762/bjoc.19.82] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Accepted: 07/18/2023] [Indexed: 08/11/2023] Open
Abstract
Sustainable oxidation protocols aim to provide an environmentally friendly and cost-effective method for the production of various chemicals and materials. The development of such protocols can lead to reduced energy consumption, fewer harmful byproducts, and increased efficiency in industrial processes. As such, this field of research is of great importance and interest to both academia and industry. This work showcases a sustainable and catalyst-free oxidation method for heteroatoms (e.g., S, P, and Se) using only air, water and light. An additional reaction pathway is proposed in which the incorporated oxygen on the heteroatoms originates from water. Furthermore, the addition of certain additives enhances productivity by affecting kinetics. The industrial potential is demonstrated by conveniently transferring the batch protocol to continuous flow using the HANU flow reactor, indicating scalability and improving safety.
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Affiliation(s)
- Damiano Diprima
- Ecosynth, Industrielaan 12, 9800 Deinze, Belgium
- Flow Chemistry Group, Van ’t Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands
| | | | - Stefano Bonciolini
- Flow Chemistry Group, Van ’t Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands
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7
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Zhang M, Zhao P, Liu Q, Liu X, Hu J, Wu D, Liu L. Construction of N-Ferrocene Substituted Benzodihydrooxazoles via a Catalyst-Free Aza-Michael Addition/C(sp 3)-O Bond Formation Tandem Reaction. Molecules 2023; 28:5615. [PMID: 37513488 PMCID: PMC10384804 DOI: 10.3390/molecules28145615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 07/21/2023] [Accepted: 07/23/2023] [Indexed: 07/30/2023] Open
Abstract
A catalyst-free aza-Michael addition/C(sp3)-O bond formation tandem reaction of substituted amino ferrocenes with quinone esters was developed, which provided a green and efficient strategy for the construction of a C(sp3)-O bond from C(sp3)-H, and a series of N-ferrocene-substituted benzodihydrooxazoles were smoothly produced in moderate to excellent yields (up to >99% yield). The mechanism experiments showed that quinone esters performed as both substrate and oxidant. The salient features of this transformation include good functional group tolerance, broad substrate scope and mild conditions.
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Affiliation(s)
- Mingliang Zhang
- Henan Engineering Research Center of Green Synthesis for Pharmaceuticals, School of Chemistry and Chemical Engineering, Shangqiu Normal University, Shangqiu 476000, China
| | - Pin Zhao
- College of Chemistry, Zhengzhou University, Zhengzhou 450052, China
| | - Qilv Liu
- Henan Engineering Research Center of Green Synthesis for Pharmaceuticals, School of Chemistry and Chemical Engineering, Shangqiu Normal University, Shangqiu 476000, China
| | - Xinlei Liu
- Henan Engineering Research Center of Green Synthesis for Pharmaceuticals, School of Chemistry and Chemical Engineering, Shangqiu Normal University, Shangqiu 476000, China
| | - Jingya Hu
- Henan Engineering Research Center of Green Synthesis for Pharmaceuticals, School of Chemistry and Chemical Engineering, Shangqiu Normal University, Shangqiu 476000, China
| | - Dongqing Wu
- Henan Engineering Research Center of Green Synthesis for Pharmaceuticals, School of Chemistry and Chemical Engineering, Shangqiu Normal University, Shangqiu 476000, China
| | - Lantao Liu
- Henan Engineering Research Center of Green Synthesis for Pharmaceuticals, School of Chemistry and Chemical Engineering, Shangqiu Normal University, Shangqiu 476000, China
- College of Chemistry, Zhengzhou University, Zhengzhou 450052, China
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8
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Wang H, Qiu N, Kong X, Hu Z, Zhong F, Li Y, Tan H. Novel Carbazole-Based Porous Organic Polymer for Efficient Iodine Capture and Rhodamine B Adsorption. ACS Appl Mater Interfaces 2023. [PMID: 36881562 DOI: 10.1021/acsami.3c00918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
A new porous organic polymer (CTF-CAR), which takes carbazole as the electron-rich center unit and thiophenes as the auxiliary group, has been synthesized through catalyst-free Schiff-base polymerization. At the same time, the structure, thermal stability, morphology, and other basic properties of the polymer were analyzed by IR, NMR, TGA, and SEM. Then, CTF-CAR was applied to iodine capture and rhodamine B adsorption. Due to its strong electron donor ability and abundant heteroatom binding sites, which have a positive effect on the interaction between the polymer network and adsorbates, CTF-CAR exhibits high uptake capacities for iodine vapor and rhodamine B as 2.86 g g-1 and 199.7 mg g-1, respectively. The recyclability test also confirmed that it has good reusability. We found that this low-cost and catalyst-free synthetic porous organic polymer has great potential for the treatment of polluted water and iodine capture.
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Affiliation(s)
- Hongyu Wang
- Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Na Qiu
- Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Xiangfei Kong
- Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Zhenguang Hu
- Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Fuxin Zhong
- Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Yongsheng Li
- China Academy of Science & Technology Development GuangXi Branch, Nanning 530022, China
| | - Haijun Tan
- Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
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9
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Hou J, Hua LL, Huang Y, Zhan LW, Li BD. Visible-Light-Promoted Catalyst-Free Oxyarylation and Hydroarylation of Alkenes with Carbon Dioxide Radical Anion. Chem Asian J 2023; 18:e202201092. [PMID: 36415140 DOI: 10.1002/asia.202201092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 11/21/2022] [Accepted: 11/22/2022] [Indexed: 11/24/2022]
Abstract
Visible-light-mediated oxyarylation and hydroarylation of alkenes with aryl halides using formate salts as the reductant and hydrogen source under ambient conditions were developed. These protocols represent rare catalyst-free examples of the realization of such transformations. Using styrenes as substrates, oxyarylation could occur smoothly. Whereas, hydroarylation proceeds employing electron deficient alkenes. Moreover, dehalogenation proceeds successfully in the absence of alkenes. We expected that this method could provide a valuable strategy for the functionalization of aryl halides.
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Affiliation(s)
- Jing Hou
- Department College of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
| | - Li-Li Hua
- Department College of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
| | - Yan Huang
- Department College of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
| | - Le-Wu Zhan
- Department College of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
| | - Bin-Dong Li
- Department College of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
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10
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Jiang S, Yang G, Shi L, Fan L, Pan Z, Wang C, Chang X, Zhou B, Xu M, Wu L, Xu C. Design, Catalyst-Free Synthesis of New Novel α-Trifluoromethylated Tertiary Alcohols Bearing Coumarins as Potential Antifungal Agents. Molecules 2022; 28. [PMID: 36615454 DOI: 10.3390/molecules28010260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 12/23/2022] [Accepted: 12/26/2022] [Indexed: 12/31/2022]
Abstract
A new method for the synthesis of α-trifluoromethylated tertiary alcohols bearing coumarins is described. The reaction of 3-(trifluoroacetyl)coumarin and pyrrole provided the target compounds with high yields under catalyst-free, mild conditions. The crystal structure of compound 3fa was investigated by X-ray diffraction analysis. The biological activities, such as in vitro antifungal activity of the α-trifluoromethylated tertiary alcohols against Fusarium graminearum, Fusarium oxysporum, Fusarium moniliforme, Rhizoctonia solani Kuhn, and Phytophthora parasitica var nicotianae, were investigated. The bioassay results indicated that compounds 3ad, 3gd, and 3hd showed broad-spectrum antifungal activity in vitro. Compound 3cd exhibited excellent fungicidal activity against Rhizoctonia solani Kuhn, with an EC50 value of 10.9 μg/mL, which was comparable to that of commercial fungicidal triadimefon (EC50 = 6.1 μg/mL). Furthermore, molecular docking study suggested that 3cd had high binding affinities with 1W9U, like argifin.
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11
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Szabó Á, Szarka G, Trif L, Gyarmati B, Bereczki L, Iván B, Kovács E. Poly(dithiophosphate)s, a New Class of Phosphorus- and Sulfur-Containing Functional Polymers by a Catalyst-Free Facile Reaction between Diols and Phosphorus Pentasulfide. Int J Mol Sci 2022; 23:ijms232415963. [PMID: 36555604 PMCID: PMC9787700 DOI: 10.3390/ijms232415963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 12/06/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022] Open
Abstract
Novel poly(dithiophosphate)s (PDTPs) were successfully synthesized under mild conditions without any additive in the presence of THF or toluene diluents at 60 °C by a direct, catalyst-free reaction between the abundant phosphorus pentasulfide (P4S10) and glycols such as ethylene glycol (EG), 1,6-hexanediol (HD) and poly(ethylene glycol) (PEG). GPC, FTIR, 1H and 31P NMR analyses proved the formation of macromolecules with dithiophosphate coupling groups having P=S and P-SH pendant functionalities. Surprisingly, the ring-opening of THF by the P-SH group and its pendant incorporation as a branching point occur during polymerization. This process is absent with toluene, providing conditions to obtain linear chains. 31P NMR measurements indicate long-time partial hydrolysis and esterification, resulting in the formation of a thiophosphoric acid moiety and branching points. Copolymerization, i.e., using mixtures of EG or HD with PEG, results in polymers with broadly varying viscoelastic properties. TGA shows the lower thermal stability of PDTPs than that of PEG due to the relatively low thermal stability of the P-O-C moieties. The low Tgs of these polymers, from -4 to -50 °C, and a lack of PEG crystallites were found by DSC. This polymerization process and the resulting novel PDTPs enable various new routes for polymer synthesis and application possibilities.
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Affiliation(s)
- Ákos Szabó
- Polymer Chemistry and Physics Research Group, Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar tudósok krt. 2, H-1117 Budapest, Hungary
- Correspondence: (Á.S.); (B.I.)
| | - Györgyi Szarka
- Polymer Chemistry and Physics Research Group, Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar tudósok krt. 2, H-1117 Budapest, Hungary
| | - László Trif
- Functional Nanoparticles Research Group, Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar tudósok krt. 2, H-1117 Budapest, Hungary
| | - Benjámin Gyarmati
- Soft Matters Group, Department of Physical Chemistry and Materials Science, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary
| | - Laura Bereczki
- Plasma Chemistry Research Group, Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar tudósok krt. 2, H-1117 Budapest, Hungary
- Chemical Crystallography Research Laboratory, Research Centre for Natural Sciences, Magyar tudósok krt. 2, H-1117 Budapest, Hungary
| | - Béla Iván
- Polymer Chemistry and Physics Research Group, Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar tudósok krt. 2, H-1117 Budapest, Hungary
- Correspondence: (Á.S.); (B.I.)
| | - Ervin Kovács
- Polymer Chemistry and Physics Research Group, Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar tudósok krt. 2, H-1117 Budapest, Hungary
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12
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Chen W, Ge C, Li JT, Beckham JL, Yuan Z, Wyss KM, Advincula PA, Eddy L, Kittrell C, Chen J, Luong DX, Carter RA, Tour JM. Heteroatom-Doped Flash Graphene. ACS Nano 2022; 16:6646-6656. [PMID: 35320673 DOI: 10.1021/acsnano.2c01136] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Heteroatom doping can effectively tailor the local structures and electronic states of intrinsic two-dimensional materials, and endow them with modified optical, electrical, and mechanical properties. Recent studies have shown the feasibility of preparing doped graphene from graphene oxide and its derivatives via some post-treatments, including solid-state and solvothermal methods, but they require reactive and harsh reagents. However, direct synthesis of various heteroatom-doped graphene in larger quantities and high purity through bottom-up methods remains challenging. Here, we report catalyst-free and solvent-free direct synthesis of graphene doped with various heteroatoms in bulk via flash Joule heating (FJH). Seven types of heteroatom-doped flash graphene (FG) are synthesized through millisecond flashing, including single-element-doped FG (boron, nitrogen, oxygen, phosphorus, sulfur), two-element-co-doped FG (boron and nitrogen), as well as three-element-co-doped FG (boron, nitrogen, and sulfur). A variety of low-cost dopants, such as elements, oxides, and organic compounds are used. The graphene quality of heteroatom-doped FG is high, and similar to intrinsic FG, the material exhibits turbostraticity, increased interlayer spacing, and superior dispersibility. Electrochemical oxygen reduction reaction of different heteroatom-doped FG is tested, and sulfur-doped FG shows the best performance. Lithium metal battery tests demonstrate that nitrogen-doped FG exhibits a smaller nucleation overpotential compared to Cu or undoped FG. The electrical energy cost for the synthesis of heteroatom-doped FG synthesis is only 1.2 to 10.7 kJ g-1, which could render the FJH method suitable for low-cost mass production of heteroatom-doped graphene.
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13
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Liu F, Li Z, Dong Q, Nie C, Wang S, Zhang B, Han P, Tong M. Catalyst-Free Periodate Activation by Solar Irradiation for Bacterial Disinfection: Performance and Mechanisms. Environ Sci Technol 2022; 56:4413-4424. [PMID: 35315645 DOI: 10.1021/acs.est.1c08268] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Periodate (PI)-based advanced oxidation process has recently attracted great attention in the water treatment processes. In this study, solar irradiation was used for PI activation to disinfect waterborne bacteria. The PI/solar irradiation system could inactivate Escherichia coli below the limit of detection (LOD, 10 CFU mL-1) with initial concentrations of 1 × 106, 1 × 107, and 1 × 108 CFU mL-1 within 20, 40, and 100 min, respectively. •O2- and •OH radicals contributed to the bacterial disinfection. These reactive radicals could attack and penetrate the cell membrane, thereby increasing the amount of intracellular reactive oxygen species and destroying the intracellular defense system. The damage of the cell membrane caused the leakage of intracellular K+ and DNA (that could be eventually degraded). Excellent bacterial disinfection performance in PI/solar irradiation systems was achieved in a wide range of solution pH (3-9), with coexisting humic acid (0.1-10 mg L-1) and broad solution ionic strengths (15-600 mM). The PI/solar irradiation system could also efficiently inactivate Gram-positive Bacillus subtilis. Moreover, PI activated by natural sunlight irradiation could inactivate 1 × 107 CFU mL-1 viable E. coli below the LOD in the river and sea waters with a working volume of 1 L in 40 and 50 min, respectively. Clearly, the PI/solar system could be potentially applied to disinfect bacteria in water.
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Affiliation(s)
- Fuyang Liu
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education, State Environmental Protection Key Laboratory of All Material Fluxes in River Ecosystems, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, P. R. China
| | - Zhengmao Li
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education, State Environmental Protection Key Laboratory of All Material Fluxes in River Ecosystems, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, P. R. China
| | - Qiqi Dong
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education, State Environmental Protection Key Laboratory of All Material Fluxes in River Ecosystems, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, P. R. China
| | - Chenyi Nie
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education, State Environmental Protection Key Laboratory of All Material Fluxes in River Ecosystems, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, P. R. China
| | - Shuai Wang
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education, State Environmental Protection Key Laboratory of All Material Fluxes in River Ecosystems, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, P. R. China
| | - Boaiqi Zhang
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education, State Environmental Protection Key Laboratory of All Material Fluxes in River Ecosystems, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, P. R. China
| | - Peng Han
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education, State Environmental Protection Key Laboratory of All Material Fluxes in River Ecosystems, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, P. R. China
| | - Meiping Tong
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education, State Environmental Protection Key Laboratory of All Material Fluxes in River Ecosystems, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, P. R. China
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14
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Yang Q, Li Y, Liu H, Wang E, Peng M, Deng T, Pan X, Luo Z, Yan Y, Yang L, Yang X. Catalyst-free decarboxylation of 4-hydroxycinnamic acids: efficient synthesis of 4-vinylphenols. R Soc Open Sci 2022; 9:220014. [PMID: 35601446 PMCID: PMC9043707 DOI: 10.1098/rsos.220014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 03/01/2022] [Indexed: 05/03/2023]
Abstract
We report herein an efficient protocol for the synthesis of 4-vinylphenols by a catalyst-free decarboxylation of trans-4-hydroxycinnamic acids. A variety of 4-vinylphenols has been synthesized in moderate to excellent yields. This protocol also features no polymerization.
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Affiliation(s)
- Qian Yang
- Department of Medicine and Food, Guizhou Vocational College of Agriculture, Guiyang 550041, People's Republic of China
| | - Youjuan Li
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, People's Republic of China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, People's Republic of China
| | - Huanhuan Liu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, People's Republic of China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, People's Republic of China
| | - Enhua Wang
- Department of Medicine and Food, Guizhou Vocational College of Agriculture, Guiyang 550041, People's Republic of China
| | - Mei Peng
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, People's Republic of China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, People's Republic of China
| | - Tingfei Deng
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, People's Republic of China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, People's Republic of China
| | - Xiong Pan
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, People's Republic of China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, People's Republic of China
| | - Zhongsheng Luo
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, People's Republic of China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, People's Republic of China
| | - Yanfang Yan
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, People's Republic of China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, People's Republic of China
| | - Lishou Yang
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, People's Republic of China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, People's Republic of China
| | - Xiaosheng Yang
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, People's Republic of China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, People's Republic of China
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15
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Yang Z, Cao TT, Sun YF, Wu DS, Xu Y, Yang SH, Wang SQ, Wang L. Expeditious assembly of biuret-guanidine derivatives via the catalyst-free transformation. J Asian Nat Prod Res 2022; 24:259-267. [PMID: 35068269 DOI: 10.1080/10286020.2022.2027372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Accepted: 01/06/2022] [Indexed: 06/14/2023]
Abstract
We disclose a mild and practical catalyst-free transformation for the expeditious construction of biuret-guanidine derivatives using aromatic isocyanates. This synthetic transformation is featured with mild reaction conditions and high efficiency.
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Affiliation(s)
- Zhen Yang
- Department of Traditional Chinese Medicine, Jilin Agricultural University, Changchun 130118, China
- Jilin Academy of Traditional Chinese Medical Science, Changchun 130021, China
| | - Ting-Ting Cao
- Department of Traditional Chinese Medicine, Jilin Agricultural University, Changchun 130118, China
- Institute of Medicinal Plant Development, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100193, China
| | - Yun-Fang Sun
- Institute of Medicinal Plant Development, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100193, China
| | - Dao-Shun Wu
- Institute of Medicinal Plant Development, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100193, China
| | - Yue Xu
- Department of Traditional Chinese Medicine, Jilin Agricultural University, Changchun 130118, China
| | - Shi-Hai Yang
- Department of Traditional Chinese Medicine, Jilin Agricultural University, Changchun 130118, China
| | - Shu-Qin Wang
- Jilin Academy of Traditional Chinese Medical Science, Changchun 130021, China
| | - Lei Wang
- Institute of Medicinal Plant Development, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100193, China
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16
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Wen Y, Huang CH, Ashley DC, Meyerstein D, Dionysiou DD, Sharma VK, Ma X. Visible Light-Induced Catalyst-Free Activation of Peroxydisulfate: Pollutant-Dependent Production of Reactive Species. Environ Sci Technol 2022; 56:2626-2636. [PMID: 35119268 DOI: 10.1021/acs.est.1c06696] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Activation of peroxydisulfate (PDS, S2O82-) via various catalysts to degrade pollutants in water has been extensively investigated. However, catalyst-free activation of PDS by visible light has been largely ignored. This paper reports effective visible light activation of PDS without any additional catalyst, leading to the degradation of a wide range of organic compounds of high environmental and human health concerns. Importantly, the formation of reactive species is distinctively different in the PDS visible light system with and without pollutants [e.g., atrazine (ATZ)]. In addition to SO4•- generated via S2O82- dissociation under visible light irradiation, O2•- and 1O2 are also produced in both systems. However, in the absence of ATZ, H2O2 and O2•- are key intermediates and precursors for 1O2, whereas in the presence of ATZ, a different pathway was followed to produce O2•- and 1O2. Both radical and nonradical processes contribute to the degradation of ATZ in the PDS visible light system. The active role of 1O2 in the degradation of ATZ besides SO4•- is manifested by the enhanced degradation of contaminants and electron paramagnetic resonance spectroscopy measurements in D2O.
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Affiliation(s)
- Yinghao Wen
- Department of Civil and Environmental Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Ching-Hua Huang
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Daniel C Ashley
- Department of Chemistry and Biochemistry, Spelman College, Atlanta, Georgia 30314, United States
| | - Dan Meyerstein
- Department of Chemical Sciences, Ariel University, Ariel, Israel 40700, United States
| | - Dionysios D Dionysiou
- Environmental Engineering and Science Program, Department of Chemical and Environmental Engineering, 705 Engineering Research Center, University of Cincinnati, Cincinnati, Ohio 45221, United States
| | - Virender K Sharma
- Department of Environmental and Occupational Health, Texas A&M University, College Station, Texas 77843, United States
| | - Xingmao Ma
- Department of Civil and Environmental Engineering, Texas A&M University, College Station, Texas 77843, United States
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17
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Waleed HQ, Csécsi M, Hadjadj R, Thangaraj R, Pecsmány D, Owen M, Szőri M, Fejes Z, Viskolcz B, Fiser B. Computational Study of Catalytic Urethane Formation. Polymers (Basel) 2021; 14:8. [PMID: 35012031 DOI: 10.3390/polym14010008] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 12/13/2021] [Accepted: 12/16/2021] [Indexed: 12/02/2022] Open
Abstract
Polyurethanes (PUs) are widely used in different applications, and thus various synthetic procedures including one or more catalysts are applied to prepare them. For PU foams, the most important catalysts are nitrogen-containing compounds. Therefore, in this work, the catalytic effect of eight different nitrogen-containing catalysts on urethane formation will be examined. The reactions of phenyl isocyanate (PhNCO) and methanol without and in the presence of catalysts have been studied and discussed using the G3MP2BHandHLYP composite method. The solvent effects have also been considered by applying the SMD implicit solvent model. A general urethane formation mechanism has been proposed without and in the presence of the studied catalysts. The proton affinities (PA) were also examined. The barrier height of the reaction significantly decreased (∆E0 > 100 kJ/mol) in the presence of the studied catalysts, which proves the important effect they have on urethane formation. The achieved results can be applied in catalyst design and development in the near future.
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18
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Kong S, Wang R, Feng S, Wang D. Tannic Acid as a Natural Crosslinker for Catalyst-Free Silicone Elastomers From Hydrogen Bonding to Covalent Bonding. Front Chem 2021; 9:778896. [PMID: 34733824 PMCID: PMC8558560 DOI: 10.3389/fchem.2021.778896] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Accepted: 10/04/2021] [Indexed: 11/13/2022] Open
Abstract
The construction of silicone elastomers crosslinked by a natural crosslinker under a catalyst-free method is highly desirable. Herein we present catalyst-free silicone elastomers (SEs) by simply introducing tannic acid (TA) as a natural crosslinker when using poly (aminopropylmethylsiloxane-co-dimethylsiloxane) (PAPMS) as the base polymer. The crosslinked bonding of these SEs can be easily changed from hydrogen bonding to covalent bonding by altering the curing reaction from room temperature to heating condition. The formability and mechanical properties of the SEs can be tuned by altering various factors, including processing technique, the amount of TA and aminopropyl-terminated polydimethylsiloxane, the molecular weight and -NH2 content of PAPMS, and the amount of reinforcing filler. The hydrogen bonding was proved by the reversible crosslinking of the elastomers, which can be gradually dissolved in tetrahydrofuran and re-formed after removing the solvent. The covalent bonding was proved by a model reaction of catechol and n-decylamine and occurred through a combination of hydroxylamine reaction and Michael addition reaction. These elastomers exhibit good thermal stability and excellent hydrophobic property and can bond iron sheets to hold the weight of 500 g, indicating their promising as adhesives. These results reveal that TA as a natural product is a suitable “green” crosslinker for the construction of catalyst-free silicone elastomers by a simple crosslinking strategy. Under this strategy, TA and more natural polyphenols could be certainly utilized as crosslinkers to fabricate more organic elastomers by selecting amine-containing polymers and further explore their extensive applications in adhesives, sealants, insulators, sensors, and so forth.
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Affiliation(s)
- Sen Kong
- National Engineering Research Center for Colloidal Materials and Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, China
| | - Rui Wang
- National Engineering Research Center for Colloidal Materials and Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, China
| | - Shengyu Feng
- National Engineering Research Center for Colloidal Materials and Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, China.,Shandong Key Laboratory of Advanced Organosilicon Materials and Technologies and State Key Laboratory of Fluorinated Functional Membrane Materials, Zibo, China
| | - Dengxu Wang
- National Engineering Research Center for Colloidal Materials and Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, China.,Shandong Key Laboratory of Advanced Organosilicon Materials and Technologies and State Key Laboratory of Fluorinated Functional Membrane Materials, Zibo, China
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19
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Wang S, Zheng L, Wang S, Ning S, Zhang Z, Xiang J. Direct C(sp 3)-H allylation of 2-alkylpyridines with Morita-Baylis-Hillman carbonates via a tandem nucleophilic substitution/aza-Cope rearrangement. Beilstein J Org Chem 2021; 17:2505-2510. [PMID: 34646399 PMCID: PMC8491709 DOI: 10.3762/bjoc.17.167] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 09/27/2021] [Indexed: 01/29/2023] Open
Abstract
A base- and catalyst-free C(sp3)–H allylic alkylation of 2-alkylpyridines with Morita–Baylis–Hillman (MBH) carbonates is described. A plausible mechanism of the reaction might involve a tandem SN2’ type nucleophilic substitution followed by an aza-Cope rearrangement. Various alkyl substituents on 2-alkylpyridines were tolerated in the reaction to give the allylation products in 26–91% yields. The developed method provides a straightforward and operational simple strategy for the allylic functionalization of 2-alkypyridine derivatives.
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Affiliation(s)
- Siyu Wang
- The Center for Combinatorial Chemistry and Drug Discovery, School of Pharmaceutical Sciences, Jilin University, 1266 Fujin Road, Changchun, Jilin 130021, P. R. China
| | - Lianyou Zheng
- The Center for Combinatorial Chemistry and Drug Discovery, School of Pharmaceutical Sciences, Jilin University, 1266 Fujin Road, Changchun, Jilin 130021, P. R. China
| | - Shutao Wang
- The Center for Combinatorial Chemistry and Drug Discovery, School of Pharmaceutical Sciences, Jilin University, 1266 Fujin Road, Changchun, Jilin 130021, P. R. China
| | - Shulin Ning
- The Center for Combinatorial Chemistry and Drug Discovery, School of Pharmaceutical Sciences, Jilin University, 1266 Fujin Road, Changchun, Jilin 130021, P. R. China
| | - Zhuoqi Zhang
- The Center for Combinatorial Chemistry and Drug Discovery, School of Pharmaceutical Sciences, Jilin University, 1266 Fujin Road, Changchun, Jilin 130021, P. R. China
| | - Jinbao Xiang
- The Center for Combinatorial Chemistry and Drug Discovery, School of Pharmaceutical Sciences, Jilin University, 1266 Fujin Road, Changchun, Jilin 130021, P. R. China
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20
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Salihu R, Ansari MNM, Abd Razak SI, Ahmad Zawawi N, Shahir S, Sani MH, Ramlee MH, Wsoo MA, Mohd Yusof AH, Nayan NHM, Gumel AM. Catalyst-Free Crosslinking Modification of Nata-de-Coco-Based Bacterial Cellulose Nanofibres Using Citric Acid for Biomedical Applications. Polymers (Basel) 2021; 13:2966. [PMID: 34503006 DOI: 10.3390/polym13172966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Revised: 08/18/2021] [Accepted: 08/18/2021] [Indexed: 12/02/2022] Open
Abstract
Bacterial cellulose (BC) has gained attention among researchers in materials science and bio-medicine due to its fascinating properties. However, BC’s fibre collapse phenomenon (i.e., its inability to reabsorb water after dehydration) is one of the drawbacks that limit its potential. To overcome this, a catalyst-free thermal crosslinking reaction was employed to modify BC using citric acid (CA) without compromising its biocompatibility. FTIR, XRD, SEM/EDX, TGA, and tensile analysis were carried out to evaluate the properties of the modified BC (MBC). The results confirm the fibre crosslinking phenomenon and the improvement of some properties that could be advantageous for various applications. The modified nanofibre displayed an improved crystallinity and thermal stability with increased water absorption/swelling and tensile modulus. The MBC reported here can be used for wound dressings and tissue scaffolding.
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21
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Xu Y, Dai S, Bi L, Jiang J, Zhang H, Chen Y. Catalyst-Free Self-Healing Bio-Based Polymers: Robust Mechanical Properties, Shape Memory, and Recyclability. J Agric Food Chem 2021; 69:9338-9349. [PMID: 34347466 DOI: 10.1021/acs.jafc.1c01885] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The poor mechanical properties and disadvantages of catalysts limit the application of self-healing materials. To address these issues, catalyst-free self-healing bio-based polymers (AESO-EMPA polymers) with robust mechanical properties were prepared using epoxidized maleopimaric anhydride (EMPA) and aminated epoxidized soybean oil (AESO). The AESO-EMPA polymers are recyclable and exhibit self-healing and shape memory because of the dual-dynamic network of multiple H-bonds and dynamic ester bonds in the structure. Under the synergistic catalysis of the tertiary amines and hydroxyl groups originated from the polymers, the polymers in this study achieve network rearrangement without the need for additional catalysts. The polymers also exhibit excellent mechanical properties with a tensile strength of 29.1 ± 0.25 MPa and a Tg of 80.2 °C owing to the unique rigid backbone of rosin and the dual-dynamic network. The AESO-EMPA polymers can be used as reusable adhesives and exhibit excellent shear strength and repair rates.
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Affiliation(s)
- Yazhou Xu
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, National Engineering Laboratory for Biomass Chemical UtilizationNanjing 210042, China
- College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China
| | - Songlin Dai
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, National Engineering Laboratory for Biomass Chemical UtilizationNanjing 210042, China
| | - Liangwu Bi
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, National Engineering Laboratory for Biomass Chemical UtilizationNanjing 210042, China
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
| | - Jianxin Jiang
- College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China
| | - Haibo Zhang
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, National Engineering Laboratory for Biomass Chemical UtilizationNanjing 210042, China
| | - Yuxiang Chen
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, National Engineering Laboratory for Biomass Chemical UtilizationNanjing 210042, China
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
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22
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Wang Q, Zhang X, Han F, Liu J, Xu Q. Efficient Construction of 5H-1,4-Benzodiazepine Derivatives by a Catalyst-Free Direct Aerobic Oxidative Annulation Strategy. ChemSusChem 2021; 14:2866-2871. [PMID: 34057822 DOI: 10.1002/cssc.202100703] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2021] [Revised: 05/30/2021] [Indexed: 06/12/2023]
Abstract
A catalyst-free direct aerobic oxidative annulation reaction of 2-aminobenzylic amines and α-hydroxy ketones efficiently afforded versatile 5H-1,4-benzodiazepine derivatives by employing air as economic and green oxidant under mild conditions. Interestingly, solvent was found to be crucial to the reaction, so that by using acetic acid as the best solvent an efficient and practical method could be achieved, requiring no catalysts or additives at all. This method tolerates a wide range of 2-aminobenzylic amines and α-hydroxy ketones and could be scaled up to multigram synthesis and directly applied in one-step synthesis of the pharmaceutically active N-desmethylmedazepam derivatives, revealing the potential of this new method in the synthesis of 5H-1,4-benzodiazepine skeleton-based pharmaceuticals and chemicals.
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Affiliation(s)
- Qi Wang
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu, 225002, P. R. China
| | - Xiaolan Zhang
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu, 225002, P. R. China
| | - Feng Han
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang, 325035, P. R. China
| | - Jianping Liu
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang, 325035, P. R. China
| | - Qing Xu
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu, 225002, P. R. China
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang, 325035, P. R. China
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23
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Baumann AN, Music A, Dechent J, Müller N, Jagau TC, Didier D. Electro-Olefination-A Catalyst Free Stereoconvergent Strategy for the Functionalization of Alkenes. Chemistry 2020; 26:8382-8387. [PMID: 32203624 PMCID: PMC7383514 DOI: 10.1002/chem.202001394] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Indexed: 01/09/2023]
Abstract
Conventional methods carrying out C(sp2 )-C(sp2 ) bond formations are typically mediated by transition-metal-based catalysts. Herein, we conceptualize a complementary avenue to access such bonds by exploiting the potential of electrochemistry in combination with organoboron chemistry. We demonstrate a transition metal catalyst-free electrocoupling between (hetero)aryls and alkenes through readily available alkenyl-tri(hetero)aryl borate salts (ATBs) in a stereoconvergent fashion. This unprecedented transformation was investigated theoretically and experimentally and led to a library of functionalized alkenes. The concept was then carried further and applied to the synthesis of the natural product pinosylvin and the derivatization of the steroidal dehydroepiandrosterone (DHEA) scaffold.
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Affiliation(s)
- Andreas N. Baumann
- Department of Chemistry and PharmacyLudwig-Maximilians-University MunichButenandtstraße 5–13, Haus F81377MunichGermany
| | - Arif Music
- Department of Chemistry and PharmacyLudwig-Maximilians-University MunichButenandtstraße 5–13, Haus F81377MunichGermany
| | - Jonas Dechent
- Department of Chemistry and PharmacyLudwig-Maximilians-University MunichButenandtstraße 5–13, Haus F81377MunichGermany
| | - Nicolas Müller
- Department of Chemistry and PharmacyLudwig-Maximilians-University MunichButenandtstraße 5–13, Haus F81377MunichGermany
| | - Thomas C. Jagau
- Department of Chemistry and PharmacyLudwig-Maximilians-University MunichButenandtstraße 5–13, Haus F81377MunichGermany
| | - Dorian Didier
- Department of Chemistry and PharmacyLudwig-Maximilians-University MunichButenandtstraße 5–13, Haus F81377MunichGermany
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24
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Cui DX, Li YD, Zhu JC, Jia YY, Wen AD, Wang PA. Highly Efficient Michael Reactions of Nitroolefins by Grinding Means. Curr Org Synth 2020; 16:449-457. [PMID: 31984908 DOI: 10.2174/1570179416666190101122150] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 11/09/2018] [Accepted: 12/11/2018] [Indexed: 11/22/2022]
Abstract
AIM AND OBJECTIVE The direct β-functionalization of trans-β-nitroolefins by Michael reaction is regarded as an efficient way to provide precursors for β-functional amines. However, Michael additions by grinding means with solvent-free conditons are rarely reported. We have developed facile access to β-functional nitroalkanes by grinding means under solvent-free conditions. MATERIALS AND METHODS From commercially available materials including ethyl 2-nitroacetate, alkyl 2-cyanoacetates and malononitrile, the grinding reactions between these above-mentioned activated methylenecompounds and various trans-β-nitroolefins were performed at room temperature and solvent-free conditions. RESULTS A highly efficient direct Michael reaction of nitroolefins by simple grinding means has been developed. Various trans-nitrostyrenes were easily converted into corresponding β-functional nitroalkanes in excellent yields within 5~10 min (up to 36 examples). CONCLUSION Herein, we have developed a simple and efficient way to β-functional nitroalkanes through Michael reactions by grinding means. The grinding Michael reaction is fast, clean and stable and these Michael adducts could be easily converted into the other amino compounds served as building blocks in organic synthesis.
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Affiliation(s)
- Dong-Xiao Cui
- Department of Pharmaceutics, Xijing Hospital, Fourth Military Medical University, Changle West Road 15, Xi'an 710032, China
| | - Yue-Dan Li
- Department of Medicinal Chemistry, School of Pharmacy, Fourth Military Medical University, Changle West Road 169, Xi'an 710032, China
| | - Jun-Chao Zhu
- Department of Medicinal Chemistry, School of Pharmacy, Fourth Military Medical University, Changle West Road 169, Xi'an 710032, China
| | - Yan-Yan Jia
- Department of Pharmaceutics, Xijing Hospital, Fourth Military Medical University, Changle West Road 15, Xi'an 710032, China
| | - Ai-Dong Wen
- Department of Pharmaceutics, Xijing Hospital, Fourth Military Medical University, Changle West Road 15, Xi'an 710032, China
| | - Ping-An Wang
- Department of Medicinal Chemistry, School of Pharmacy, Fourth Military Medical University, Changle West Road 169, Xi'an 710032, China
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25
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Zhou W, Hao SJ, Feng GD, Jia PY, Ren XL, Zhang M, Zhou YH. Properties of Rigid Polyurethane Foam Modified by Tung Oil-Based Polyol and Flame-Retardant Particles. Polymers (Basel) 2020; 12:E119. [PMID: 31948034 PMCID: PMC7023429 DOI: 10.3390/polym12010119] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 12/17/2019] [Accepted: 12/21/2019] [Indexed: 11/16/2022] Open
Abstract
Although tung oil is renewable, with an abundant production and low price in China, and it is used to synthesize different polyols for rigid polyurethane foam (RPUF), it remains a challenge to improve the properties of RPUF by redesigning the formula. Therefore, we propose four novel compounds to strengthen the properties of RPUF, such as the catalyst-free synthesis of tung oil-based polyol (PTOK), aluminum phosphate micro-capsule (AM), silica micro-capsule (SiM), and grafted epoxidized monoglyceride of tung oil on the surface of SiO2 (SiE), which were designed and introduced into the RPUF. Because of the PTOK with a catalytic function, the foaming process of some RPUF samples was catalyst-free. The results show that the incorporation of AM, SiM, and SiE, respectively, endow RPUF with a better thermal stability at a high temperature, and the T5%, Tmax1, and Tmax2 of RPUF appeared to be reduced, however, the Tmax3 and residue rate at 800 °C were improved, which may have a positive effect on the extension of the rescue time in case of fire, and the limiting oxygen index (LOI) value was increased to 22.6%. The formula, containing 25% PTOK made the RPUF environment-friendly. The results were obtained by comparing the pore size and mechanical properties of the RPUF-the AM had a better dispersion in the foam, and the foam obtained a better mechanical, thermal, and flame retardancy.
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Affiliation(s)
- Wei Zhou
- Institute of Chemical Industry of Forestry Products, Chinese Academy of Forestry, Nanjing 210042, China; (W.Z.); (Y.-H.Z.)
| | - Shu-Jie Hao
- Institute of Chemical Industry of Forestry Products, Chinese Academy of Forestry, Nanjing 210042, China; (W.Z.); (Y.-H.Z.)
| | - Guo-Dong Feng
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
| | - Pu-You Jia
- Key Lab of Biomass Energy and Materials, Jiangsu Province, Nanjing 210042, China
| | - Xiao-Li Ren
- Key Lab of Forest Chemical Engineering, SFA, Nanjing 210042, China
| | - Meng Zhang
- Institute of Chemical Industry of Forestry Products, Chinese Academy of Forestry, Nanjing 210042, China; (W.Z.); (Y.-H.Z.)
| | - Yong-Hong Zhou
- Institute of Chemical Industry of Forestry Products, Chinese Academy of Forestry, Nanjing 210042, China; (W.Z.); (Y.-H.Z.)
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26
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Zhang X, Jevasuwan W, Sugimoto Y, Fukata N. Controlling Catalyst-Free Formation and Hole Gas Accumulation by Fabricating Si/Ge Core-Shell and Si/Ge/Si Core-Double Shell Nanowires. ACS Nano 2019; 13:13403-13412. [PMID: 31626528 DOI: 10.1021/acsnano.9b06821] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The catalyst-free formation of silicon (Si) and germanium (Ge) core-shell and core-double shell nanowires (NWs) was studied for use as building blocks of high electron (hole) mobility transistors (HEMTs). Vertically aligned p-type Si (p-Si)/intrinsic Ge (i-Ge) core-shell NWs and p-Si/i-Ge/p-Si core-double shell NWs with uniform diameters were formed by combining nanoimprint lithography, Bosch etching, and chemical vapor deposition. The boron (B) doping process was used to prepare p-Si NWs. The hole gas accumulation could be reliably detected from the i-Ge shell region in the p-Si/i-Ge core-shell NW and p-Si/i-Ge/p-Si core-double shell NW arrays through the Fano resonance effect, showing that core-shell NW heterostructures can suppress impurity scattering and act as high-mobility transistor channels. This provides the possibility for the future creation of vertical high-speed transistors.
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Affiliation(s)
- Xiaolong Zhang
- International Center for Materials Nanoarchitectonics , National Institute for Materials Science , Tsukuba , Ibaraki 3050044 , Japan
- Graduate School of Pure and Applied Sciences , University of Tsukuba , Tsukuba , Ibaraki 3058573 , Japan
| | - Wipakorn Jevasuwan
- International Center for Materials Nanoarchitectonics , National Institute for Materials Science , Tsukuba , Ibaraki 3050044 , Japan
| | - Yoshimasa Sugimoto
- International Center for Materials Nanoarchitectonics , National Institute for Materials Science , Tsukuba , Ibaraki 3050044 , Japan
| | - Naoki Fukata
- International Center for Materials Nanoarchitectonics , National Institute for Materials Science , Tsukuba , Ibaraki 3050044 , Japan
- Graduate School of Pure and Applied Sciences , University of Tsukuba , Tsukuba , Ibaraki 3058573 , Japan
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27
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Zhang M, Chen MN, Li JM, Liu N, Zhang ZH. Visible-Light-Initiated One-Pot, Three-Component Synthesis of 2-Amino-4 H-pyran-3,5-dicarbonitrile Derivatives. ACS Comb Sci 2019; 21:685-691. [PMID: 31433619 DOI: 10.1021/acscombsci.9b00124] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A novel approach for the visible-light-initiated synthesis of 2-amino-4H-pyran-3,5-dicarbonitrile derivatives via a one-pot, three-component reaction of aldehydes or isatins, malononitrile, and α-cyano ketones has been developed. The reaction was carried out at room temperature in ethanol/water to give the corresponding products with a wide range of functional groups in high yields. This process did not require any additives or chromatographic separation and could be applied for gram-scale synthesis.
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Affiliation(s)
- Mo Zhang
- National Demonstration Center for Experimental Chemistry Education, Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Material Science, Hebei Normal University, No. 20 South Second Ring East Road, Shijiazhuang 050024, P. R. China
| | - Meng-Nan Chen
- National Demonstration Center for Experimental Chemistry Education, Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Material Science, Hebei Normal University, No. 20 South Second Ring East Road, Shijiazhuang 050024, P. R. China
| | - Jiao-Mian Li
- National Demonstration Center for Experimental Chemistry Education, Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Material Science, Hebei Normal University, No. 20 South Second Ring East Road, Shijiazhuang 050024, P. R. China
| | - Nan Liu
- National Demonstration Center for Experimental Chemistry Education, Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Material Science, Hebei Normal University, No. 20 South Second Ring East Road, Shijiazhuang 050024, P. R. China
| | - Zhan-Hui Zhang
- National Demonstration Center for Experimental Chemistry Education, Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Material Science, Hebei Normal University, No. 20 South Second Ring East Road, Shijiazhuang 050024, P. R. China
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28
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Pandey VK, Donthireddy SNR, Rit A. Catalyst-Free and Solvent-Free Facile Hydroboration of Imines. Chem Asian J 2019; 14:3255-3258. [PMID: 31430049 DOI: 10.1002/asia.201901016] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 08/19/2019] [Indexed: 11/06/2022]
Abstract
A facile process for the catalyst-free and solvent-free hydroboration of aromatic as well as heteroaromatic imines is reported. This atom-economic methodology is scalable, compatible with sterically and electronically diverse imines, displaying excellent tolerance towards various functional groups, and works efficiently at ambient temperature in most of the cases, affording secondary amines in good to excellent yield after hydrolysis.
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Affiliation(s)
- Vipin K Pandey
- Department of Chemistry, Indian Institute of Technology Madras, Chennai-, 600036, India
| | | | - Arnab Rit
- Department of Chemistry, Indian Institute of Technology Madras, Chennai-, 600036, India
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29
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Xie Y, Cheng T, Liu C, Chen K, Cheng Y, Chen Z, Qiu L, Cui G, Yu Y, Cui L, Zhang M, Zhang J, Ding F, Liu K, Liu Z. Ultrafast Catalyst-Free Graphene Growth on Glass Assisted by Local Fluorine Supply. ACS Nano 2019; 13:10272-10278. [PMID: 31430126 DOI: 10.1021/acsnano.9b03596] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
High-quality graphene film grown on dielectric substrates by a direct chemical vapor deposition (CVD) method promotes the application of high-performance graphene-based devices in large scale. However, due to the noncatalytic feature of insulating substrates, the production of graphene film on them always has a low growth rate and is time-consuming (typically hours to days), which restricts real potential applications. Here, by employing a local-fluorine-supply method, we have pushed the massive fabrication of a graphene film on a wafer-scale insulating substrate to a short time of just 5 min without involving any metal catalyst. The highly enhanced domain growth rate (∼37 nm min-1) and the quick nucleation rate (∼1200 nuclei min-1 cm-2) both account for this high productivity of graphene film. Further first-principles calculation demonstrates that the released fluorine from the fluoride substrate at high temperature can rapidly react with CH4 to form a more active carbon feedstock, CH3F, and the presence of CH3F molecules in the gas phase much lowers the barrier of carbon attachment, providing sufficient carbon feedstock for graphene CVD growth. Our approach presents a potential route to accomplish exceptionally large-scale and high-quality graphene films on insulating substrates, i.e., SiO2, SiO2/Si, fiber, etc., at low cost for industry-level applications.
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Affiliation(s)
- Yadian Xie
- Center for Nanochemistry, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Academy for Advanced Interdisciplinary Studies , Peking University , Beijing 100871 , China
| | - Ting Cheng
- Center for Nanochemistry, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Academy for Advanced Interdisciplinary Studies , Peking University , Beijing 100871 , China
- Centre for Multidimensional Carbon Materials, Institute for Basic Science, School of Materials Science and Engineering , Ulsan National Institute of Science and Technology , Ulsan 44919 , Korea
| | - Can Liu
- State Key Laboratory for Mesoscopic Physics, Collaborative Innovation Center of Quantum Matter, School of Physics, Academy for Advanced Interdisciplinary Studies , Peking University , Beijing 100871 , China
| | - Ke Chen
- Center for Nanochemistry, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Academy for Advanced Interdisciplinary Studies , Peking University , Beijing 100871 , China
- Institute of Micro/Nano Photonic Materials and Applications, School of Physics and Electronics , Henan University , Kaifeng 475004 , China
| | - Yi Cheng
- Center for Nanochemistry, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Academy for Advanced Interdisciplinary Studies , Peking University , Beijing 100871 , China
| | - Zhaolong Chen
- Center for Nanochemistry, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Academy for Advanced Interdisciplinary Studies , Peking University , Beijing 100871 , China
| | - Lu Qiu
- Centre for Multidimensional Carbon Materials, Institute for Basic Science, School of Materials Science and Engineering , Ulsan National Institute of Science and Technology , Ulsan 44919 , Korea
| | - Guang Cui
- Center for Nanochemistry, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Academy for Advanced Interdisciplinary Studies , Peking University , Beijing 100871 , China
| | - Yue Yu
- Center for Nanochemistry, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Academy for Advanced Interdisciplinary Studies , Peking University , Beijing 100871 , China
| | - Lingzhi Cui
- Center for Nanochemistry, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Academy for Advanced Interdisciplinary Studies , Peking University , Beijing 100871 , China
| | - Mengtao Zhang
- Center for Nanochemistry, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Academy for Advanced Interdisciplinary Studies , Peking University , Beijing 100871 , China
| | - Jin Zhang
- Center for Nanochemistry, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Academy for Advanced Interdisciplinary Studies , Peking University , Beijing 100871 , China
- Beijing Graphene Institute (BGI) , Beijing 100095 , China
| | - Feng Ding
- Centre for Multidimensional Carbon Materials, Institute for Basic Science, School of Materials Science and Engineering , Ulsan National Institute of Science and Technology , Ulsan 44919 , Korea
| | - Kaihui Liu
- State Key Laboratory for Mesoscopic Physics, Collaborative Innovation Center of Quantum Matter, School of Physics, Academy for Advanced Interdisciplinary Studies , Peking University , Beijing 100871 , China
- Beijing Graphene Institute (BGI) , Beijing 100095 , China
| | - Zhongfan Liu
- Center for Nanochemistry, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Academy for Advanced Interdisciplinary Studies , Peking University , Beijing 100871 , China
- Beijing Graphene Institute (BGI) , Beijing 100095 , China
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30
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Jiang C, Chen Y, Zhang H, Tan JP, Wang T. Catalyst-Free Synthesis of α-Functionalized 2H-Chromenes in Water: A Tandem Self-Promoted pseudo-Substitution and Decarboxylation Process. Chem Asian J 2019; 14:2938-2944. [PMID: 31298487 DOI: 10.1002/asia.201900641] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 07/01/2019] [Indexed: 11/07/2022]
Abstract
A catalyst-free decarboxylative reaction between β-keto acids and 2H-chromene acetals in water was developed. This reaction featured a broad substrate scope and easily obtainable starting materials to afford α-functionalized 2H-chromenes in high yields. The synthetic value of this protocol was also demonstrated by the scale-up synthesis and versatile conversions of the title product into other useful compounds. In addition, control experiments indicated that water was essential for the reactivity. Mechanistic studies further revealed that the reaction proceeded through a self-promoted tandem pseudo-substitution and decarboxylation process.
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Affiliation(s)
- Chunhui Jiang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, 212003, P. R. China.,Key Laboratory of Green Chemistry&Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P. R. China
| | - Yayun Chen
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, 212003, P. R. China.,Key Laboratory of Green Chemistry&Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P. R. China
| | - Hongkui Zhang
- Key Laboratory of Green Chemistry&Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P. R. China
| | - Jian-Ping Tan
- Key Laboratory of Green Chemistry&Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P. R. China
| | - Tianli Wang
- Key Laboratory of Green Chemistry&Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P. R. China
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31
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Tang L, Matuska JH, Huang YH, He YH, Guan Z. Amide Synthesis from Thiocarboxylic Acids and Amines by Spontaneous Reaction and Electrosynthesis. ChemSusChem 2019; 12:2570-2575. [PMID: 30994975 DOI: 10.1002/cssc.201900814] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 04/16/2019] [Indexed: 06/09/2023]
Abstract
Amide bond formation is one of the most important basic reactions in chemistry. A catalyst-free approach for constructing amide bonds from thiocarboxylic acids and amines was developed. The mechanistic studies showed that the disulfide was the key intermediate for this amide synthesis. Thiobenzoic acids could be automatically oxidized to disulfides in air, thioaliphatic acids could be electro-oxidized to disulfides, and the resulting disulfides reacted with amines to give the corresponding amides. By this method, various amides could be easily synthesized in excellent yields without using any catalyst or activator. The successful synthesis of bioactive compounds also highlights the synthetic utility of this strategy in medicinal chemistry.
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Affiliation(s)
- Li Tang
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, P.R. China
| | - Jack H Matuska
- Department of Chemistry, College of Saint Benedict and Saint John's University, Collegeville, MN, 56321, USA
| | - Yu-Han Huang
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, P.R. China
| | - Yan-Hong He
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, P.R. China
| | - Zhi Guan
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, P.R. China
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32
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Kuciński K, Hreczycho G. A Highly Effective Route to Si-O-Si Moieties through O-Silylation of Silanols and Polyhedral Oligomeric Silsesquioxane Silanols with Disilazanes. ChemSusChem 2019; 12:1043-1048. [PMID: 30536641 DOI: 10.1002/cssc.201802757] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Indexed: 06/09/2023]
Abstract
A simple and highly practical catalyst-free O-silylation of silanols with commercially available disilazanes has been developed under mild conditions. In the case of polyhedral oligomeric silsesquioxane (POSS) silanols and some other silanols, it was necessary to use catalytic amounts of inexpensive Bi(OTf)3 as additional catalyst. This efficient chlorine-free protocol involves the synthesis of a wide range of important organosilicon derivatives such as unsymmetrical disiloxanes and functionalized silsesquioxanes.
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Affiliation(s)
- Krzysztof Kuciński
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Umultowska 89b, 61-614, Poznań, Poland
| | - Grzegorz Hreczycho
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Umultowska 89b, 61-614, Poznań, Poland
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33
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Chen Y, Wang Y, Zhu S, Chen C, Danner VA, Li Y, Dai J, Li H, Fu KK, Li T, Liu Y, Hu L. One-Step, Catalyst-Free, Scalable in Situ Synthesis of Single-Crystal Aluminum Nanowires in Confined Graphene Space. ACS Appl Mater Interfaces 2019; 11:6009-6014. [PMID: 30644717 DOI: 10.1021/acsami.8b18977] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Nanowires have a wide range of applications, such as transparent electrodes, Li-ion battery anodes, light-emitting diodes, solar cells, and electronic devices. Currently, aluminum (Al) nanowires can be synthesized by thermally induced substitution of germanium (Ge) nanowires, chemical vapor deposition on other metal substrates, and template-assisted growth methods. However, there are still challenges in fabricating extremely high-purity nanowires, large-scale manufacturing, and simplifying the synthesis process and conditions. Here, we report for the first time that single-crystal Al nanowires can be one-step, in situ synthesized on a reduced graphene oxide (RGO) substrate on a large scale without using any catalysts. Through a simple high temperature treatment process, commercial micro-sized Al powders in RGO film were transformed into a single-crystal Al nanowire with an average length of 1.2 μm and an average diameter of 18 nm. The possible formation mechanism of the single-crystal Al nanowires is proposed as follows: hot aluminum atoms eject from the pristine aluminum/alumina core/shell structure of Al powders when they build up enough energy from the thermal stress under high temperature and confined space conditions, which is supported by both experimental and computational results. The method introduced here can be extended to allow the synthesis of one-dimensional highly reactive materials, like alkali metal nanowires, in confined spaces.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Yang Liu
- Department of Materials Science and Engineering , North Carolina State University , Raleigh , North Carolina 27606 , United States
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34
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Yang L, Wu Y, Yang Y, Wen C, Wan JP. Catalyst-free synthesis of 4-acyl- NH-1,2,3-triazoles by water-mediated cycloaddition reactions of enaminones and tosyl azide. Beilstein J Org Chem 2018; 14:2348-2353. [PMID: 30254699 PMCID: PMC6142726 DOI: 10.3762/bjoc.14.210] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Accepted: 08/22/2018] [Indexed: 12/15/2022] Open
Abstract
The synthesis of 4-acyl-NH-1,2,3-triazoles has been accomplished with high efficiency through the cycloaddition reactions between N,N-dimethylenaminones and tosyl azide. This method is featured with extraordinary sustainability by employing water as the sole medium, free of any catalyst or additive, authentically mild conditions (40 °C stirring) as well as practical scalability.
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Affiliation(s)
- Lu Yang
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Yuwei Wu
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Yiming Yang
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Chengping Wen
- College of Basic Medical Sciences, Zhejiang Chinese Medical University, Hangzhou 310053, P. R. China
| | - Jie-Ping Wan
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China
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35
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Abstract
Catalyst- and chemical oxidant-free electrochemical azole C-H aminations were accomplished via cross-dehydrogenative C-H/N-H functionalization. The catalyst-free electrochemical C-H amination proved feasible on azoles with high levels of efficacy and selectivity, avoiding the use of stoichiometric oxidants under ambient conditions. Likewise, the C(sp3 )-H nitrogenation proved viable under otherwise identical conditions. The dehydrogenative C-H amination featured ample scope, including cyclic and acyclic aliphatic amines as well as anilines, and employed sustainable electricity as the sole oxidant.
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Affiliation(s)
- Youai Qiu
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstrasse 2, 37077, Göttingen, Germany
| | - Julia Struwe
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstrasse 2, 37077, Göttingen, Germany
| | - Tjark H Meyer
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstrasse 2, 37077, Göttingen, Germany
| | - João C A Oliveira
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstrasse 2, 37077, Göttingen, Germany
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstrasse 2, 37077, Göttingen, Germany
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36
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Gui HZ, Gao YN, Wei Y, Shi M. Highly Efficient and Diastereoselective Construction of Trifluoromethyl-Containing Spiro[pyrrolidin-3,2'-oxindole] by a Catalyst-free Mutually Activated [3+2] Cycloaddition Reaction. Chemistry 2018; 24:10038-10043. [PMID: 29756337 DOI: 10.1002/chem.201801971] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 05/05/2018] [Indexed: 01/24/2023]
Abstract
A catalyst-free self-catalyzed [3+2] cycloaddition reaction of isatin-derived α-(trifluoromethyl)imines with vinylpyridines is reported. The reaction offers a straightforward and atom-economical procedure for the preparation of a series of 5'-trifluoromethyl-spiro[pyrrolidin-3,2'-oxindoles] in excellent yields and diastereoselectivities. The reaction mechanism has been investigated by control experiments, DFT calculation of pKa values and the kinetic profiles, revealing that this reaction featured the mutual activation between isatin-derived α-(trifluoromethyl)imines and vinylpyridine to generate the reactive species.
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Affiliation(s)
- Hou-Ze Gui
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Meilong Road No. 130, Shanghai, 200237, China
| | - Yu-Ning Gao
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Meilong Road No. 130, Shanghai, 200237, China
| | - Yin Wei
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, University of Chinese Academy of Sciences, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Min Shi
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Meilong Road No. 130, Shanghai, 200237, China.,State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, P. R. China.,State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, University of Chinese Academy of Sciences, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
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37
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Gao Y, Zhang GN, Wang J, Bai X, Li Y, Wang Y. One-Pot Syntesis of 3-Functionalized 4-Hydroxycoumarin under Catalyst-Free Conditions. Molecules 2018; 23:E235. [PMID: 29361771 DOI: 10.3390/molecules23010235] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 01/17/2018] [Accepted: 01/19/2018] [Indexed: 12/14/2022] Open
Abstract
A concise and efficient one-pot synthesis of 3-functionalized 4-hydroxycoumarin derivatives via a three-component domino reaction of 4-hydroxycoumarin, phenylglyoxal and 3-arylaminocyclopent-2-enone or 4-arylaminofuran-2(5H)-one under catalyst-free and microwave irradiation conditions is described. This synthesis involves a group-assisted purification process, which avoids traditional recrystallization and chromatographic purification methods.
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38
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Zeng LY, Liu T, Yang J, Yang Y, Cai C, Liu S. "On-Water" Facile Synthesis of Novel Pyrazolo[3,4-b]pyridinones Possessing Anti-influenza Virus Activity. ACS Comb Sci 2017; 19:437-446. [PMID: 28581706 DOI: 10.1021/acscombsci.7b00016] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A facile and versatile "on-water" protocol for the synthesis of pyrazolo[3,4-b]pyridinones was developed by the unprecedented construction of two rings and five new bonds in one-pot. It was proved that water was an important promoter of the reaction and PEG2000 was found to improve the reaction in terms of yield. 32 Derivatives were newly synthesized and most of them were prepared in an hour. The scope and limitation indicated that electron withdrawing groups substituted on synthons, substituted benzoyl acetonitriles or aryl aldehydes, were helpful to construct the pyrazolo[3,4-b]pyridinones. The reaction media PEG2000/H2O was successfully recycled and reused at least 5 times without any obvious decrease in yield. The anti-influenza activities of the derivatives were evaluated and the screening results highlighted two derivatives, which exhibited strong inhibitory activity against H5N1 pseudovirus. These positive bioassay results implied that the library of potential anti-influenza virus agent candidates could be rapidly prepared in an eco-friendly manner, and provided a new insight into drug discovery for medicinal chemists.
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Affiliation(s)
- Li-Yan Zeng
- Guangdong
Provincial Key Laboratory of New Drug Screening, Guangzhou Key Laboratory
of Drug Research for Emerging Virus Prevention and Treatment, School
of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Teng Liu
- Guangdong
Provincial Key Laboratory of New Drug Screening, Guangzhou Key Laboratory
of Drug Research for Emerging Virus Prevention and Treatment, School
of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Jie Yang
- Guangdong
Provincial Key Laboratory of New Drug Screening, Guangzhou Key Laboratory
of Drug Research for Emerging Virus Prevention and Treatment, School
of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Yueli Yang
- Guangdong
Provincial Key Laboratory of New Drug Screening, Guangzhou Key Laboratory
of Drug Research for Emerging Virus Prevention and Treatment, School
of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Chun Cai
- Chemical
Engineering College, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Shuwen Liu
- Guangdong
Provincial Key Laboratory of New Drug Screening, Guangzhou Key Laboratory
of Drug Research for Emerging Virus Prevention and Treatment, School
of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
- State
Key Laboratory of Organ Failure Research, Guangdong Provincial Institute
of Nephrology, Southern Medical University, Guangzhou 510515, China
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39
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Oliverio M, Costanzo P, Nardi M, Calandruccio C, Salerno R, Procopio A. Tunable microwave-assisted method for the solvent-free and catalyst-free peracetylation of natural products. Beilstein J Org Chem 2016; 12:2222-2233. [PMID: 27829931 PMCID: PMC5082547 DOI: 10.3762/bjoc.12.214] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Accepted: 09/29/2016] [Indexed: 12/03/2022] Open
Abstract
Background: The peracetylation is a simple chemical modification that can be used to enhance the bioavailability of hydrophilic products and to obtain safe and stable pro-drugs. Results: A totally green, solvent-free and catalyst-free microwave (MW)-assisted method for peracetylation of natural products such as oleuropein, alpha-hederin, quercetin and rutin is presented. By simply tuning the MW heating program, polyols with chemical diverse –OH groups or thermolabile functionalities can be peracetylated to improve the biological activity without degradation of the natural starting molecules. An evaluation of the process greenness was performed. Conclusion: The method is potentially universally applicable for green acetylation of hydrophilic biological molecules, potentially easily scalable for industrial applications, including pharmaceutical, cosmetic and food industry.
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Affiliation(s)
- Manuela Oliverio
- Department of Health Science, University Magna Graecia of Catanzaro, Viale Europa, Loc. Germaneto, 88100 Catanzaro, Italy; InterRegional Center for Food Safety and Health, University Magna Graecia of Catanzaro, Viale Europa, Loc. Germaneto, 88100 Catanzaro, Italy
| | - Paola Costanzo
- Department of Health Science, University Magna Graecia of Catanzaro, Viale Europa, Loc. Germaneto, 88100 Catanzaro, Italy
| | - Monica Nardi
- Department of Chemistry, Università della Calabria, Cubo 12C, 87036-Arcavacata di Rende (CS), Italy
| | - Carla Calandruccio
- Department of Health Science, University Magna Graecia of Catanzaro, Viale Europa, Loc. Germaneto, 88100 Catanzaro, Italy
| | - Raffaele Salerno
- InterRegional Center for Food Safety and Health, University Magna Graecia of Catanzaro, Viale Europa, Loc. Germaneto, 88100 Catanzaro, Italy
| | - Antonio Procopio
- Department of Health Science, University Magna Graecia of Catanzaro, Viale Europa, Loc. Germaneto, 88100 Catanzaro, Italy; InterRegional Center for Food Safety and Health, University Magna Graecia of Catanzaro, Viale Europa, Loc. Germaneto, 88100 Catanzaro, Italy
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40
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Soo MT, Zheng K, Gao Q, Tan HH, Jagadish C, Zou J. Growth of Catalyst-Free Epitaxial InAs Nanowires on Si Wafers Using Metallic Masks. Nano Lett 2016; 16:4189-4193. [PMID: 27248817 DOI: 10.1021/acs.nanolett.6b01064] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Development of heteroepitaxy growth of catalyst-free vertical III-V nanowires on Si wafers is highly desirable for future nanoscale Si-based electronic and optoelectronic devices. In this study, a proof-of-concept approach is developed for catalyst-free heteroepitaxy growth of InAs nanowires on Si wafers. Before the growth of InAs nanowires, a Si-compatible metallic film with a thickness of several tens of nanometers was predeposited on a Si wafer and then annealed to form nanosize openings so as to obtain a metallic mask. These nano-openings exposed the surface of the Si wafer, which allowed subsequent nucleation and growth of epitaxial InAs nanowires directly on the surface of the Si wafer. The small size of the nano-openings limits the lateral growth of the nanostructures but promotes their axial growth. Through this approach, catalyst-free InAs nanowires were grown on both Si (111) and (001) wafers successfully at different growth temperatures. In particular, ultralong defect-free InAs nanowires with the wurtzite structure were grown the Si (111) wafers at 550 °C using the Ni mask. This study offers a simple, cost-effective, and scalable method to grow catalyst-free III-V nanowires on Si wafers. The simplicity of the approach opens a new avenue for the growth and integration of catalyst-free high-quality heteroepitaxial III-V nanowires on Si wafers.
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Affiliation(s)
| | | | - Qiang Gao
- Department of Electronic Materials Engineering, Research School of Physics and Engineering, The Australian National University , Canberra, Australian Capital Territory 2601, Australia
| | - H Hoe Tan
- Department of Electronic Materials Engineering, Research School of Physics and Engineering, The Australian National University , Canberra, Australian Capital Territory 2601, Australia
| | - Chennupati Jagadish
- Department of Electronic Materials Engineering, Research School of Physics and Engineering, The Australian National University , Canberra, Australian Capital Territory 2601, Australia
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41
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Dhinakaran I, Padmini V, Bhuvanesh N. Chemodivergent, One-Pot, Multi-Component Synthesis of Pyrroles and Tetrahydropyridines under Solvent- and Catalyst-Free Conditions Using the Grinding Method. ACS Comb Sci 2016; 18:236-42. [PMID: 26972275 DOI: 10.1021/acscombsci.5b00154] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A highly efficient, chemoselective synthesis of a library of polysubstituted pyrroles and tetrahydropyridines has been achieved through the one-pot, multicomponent reactions of ethyl (E)-3-(aryl/alkyl amino) acrylates, 2,2-dihydroxy-1-arylethan-1-ones, and malononitrile under solvent- and catalyst-free grinding conditions. The selective formation of pyrrole or tetrahydropyridines relied on substitution of the N-aryl of ethyl (E)-3-(4-arylamino) acrylates. These reactions presumably occurred via a domino Knoevenagel condensation and Michael addition followed by an intramolecular cyclization sequence of reactions in a single transformation.
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Affiliation(s)
- Isaivani Dhinakaran
- Department
of Organic Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai 625 021, Tamil Nadu, India
| | - Vediappen Padmini
- Department
of Organic Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai 625 021, Tamil Nadu, India
| | - Nattamai Bhuvanesh
- Department of Chemistry, Texas A&M University, College Station, Texas 77842, United States
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Potts H, Friedl M, Amaduzzi F, Tang K, Tütüncüoglu G, Matteini F, Alarcon Lladó E, McIntyre PC, Fontcuberta i Morral A. From Twinning to Pure Zincblende Catalyst-Free InAs(Sb) Nanowires. Nano Lett 2016; 16:637-643. [PMID: 26686394 DOI: 10.1021/acs.nanolett.5b04367] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
III-V nanowires are candidate building blocks for next generation electronic and optoelectronic platforms. Low bandgap semiconductors such as InAs and InSb are interesting because of their high electron mobility. Fine control of the structure, morphology, and composition are key to the control of their physical properties. In this work, we present how to grow catalyst-free InAs1-xSbx nanowires, which are stacking fault and twin defect-free over several hundreds of nanometers. We evaluate the impact of their crystal phase purity by probing their electrical properties in a transistor-like configuration and by measuring the phonon-plasmon interaction by Raman spectroscopy. We also highlight the importance of high-quality dielectric coating for the reduction of hysteresis in the electrical characteristics of the nanowire transistors. High channel carrier mobilities and reduced hysteresis open the path for high-frequency devices fabricated using InAs1-xSbx nanowires.
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Affiliation(s)
- Heidi Potts
- Laboratoire des Matériaux Semiconducteurs, École Polytechnique Fédérale de Lausanne , 1015 Lausanne, Switzerland
| | - Martin Friedl
- Laboratoire des Matériaux Semiconducteurs, École Polytechnique Fédérale de Lausanne , 1015 Lausanne, Switzerland
| | - Francesca Amaduzzi
- Laboratoire des Matériaux Semiconducteurs, École Polytechnique Fédérale de Lausanne , 1015 Lausanne, Switzerland
| | - Kechao Tang
- Department of Materials Science and Engineering, Stanford University , Stanford, California 94305, United States
| | - Gözde Tütüncüoglu
- Laboratoire des Matériaux Semiconducteurs, École Polytechnique Fédérale de Lausanne , 1015 Lausanne, Switzerland
| | - Federico Matteini
- Laboratoire des Matériaux Semiconducteurs, École Polytechnique Fédérale de Lausanne , 1015 Lausanne, Switzerland
| | - Esther Alarcon Lladó
- Laboratoire des Matériaux Semiconducteurs, École Polytechnique Fédérale de Lausanne , 1015 Lausanne, Switzerland
| | - Paul C McIntyre
- Department of Materials Science and Engineering, Stanford University , Stanford, California 94305, United States
| | - Anna Fontcuberta i Morral
- Laboratoire des Matériaux Semiconducteurs, École Polytechnique Fédérale de Lausanne , 1015 Lausanne, Switzerland
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43
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Farrell AC, Lee WJ, Senanayake P, Haddad MA, Prikhodko SV, Huffaker DL. High-Quality InAsSb Nanowires Grown by Catalyst-Free Selective-Area Metal-Organic Chemical Vapor Deposition. Nano Lett 2015; 15:6614-6619. [PMID: 26422559 DOI: 10.1021/acs.nanolett.5b02389] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We report on the first demonstration of InAs1-xSbx nanowires grown by catalyst-free selective-area metal-organic chemical vapor deposition (SA-MOCVD). Antimony composition as high as 15 % is achieved, with strong photoluminescence at all compositions. The quality of the material is assessed by comparing the photoluminescence (PL) peak full-width at half-max (fwhm) of the nanowires to that of epitaxially grown InAsSb thin films on InAs. We find that the fwhm of the nanowires is only a few meV broader than epitaxial films, and a similar trend of relatively constant fwhm for increasing antimony composition is observed. Furthermore, the PL peak energy shows a strong dependence on temperature, suggesting wave-vector conserving transitions are responsible for the observed PL in spite of lattice mismatched growth on InAs substrate. This study shows that high-quality InAsSb nanowires can be grown by SA-MOCVD on lattice mismatched substrate, resulting in material suitable for infrared detectors and high-performance nanoelectronic devices.
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Affiliation(s)
- Alan C Farrell
- Electrical Engineering Department, ‡Materials Science Department, and §California NanoSystems Institute, University of California at Los Angeles , Los Angeles, California 90095, United States
| | - Wook-Jae Lee
- Electrical Engineering Department, ‡Materials Science Department, and §California NanoSystems Institute, University of California at Los Angeles , Los Angeles, California 90095, United States
| | - Pradeep Senanayake
- Electrical Engineering Department, ‡Materials Science Department, and §California NanoSystems Institute, University of California at Los Angeles , Los Angeles, California 90095, United States
| | - Michael A Haddad
- Electrical Engineering Department, ‡Materials Science Department, and §California NanoSystems Institute, University of California at Los Angeles , Los Angeles, California 90095, United States
| | - Sergey V Prikhodko
- Electrical Engineering Department, ‡Materials Science Department, and §California NanoSystems Institute, University of California at Los Angeles , Los Angeles, California 90095, United States
| | - Diana L Huffaker
- Electrical Engineering Department, ‡Materials Science Department, and §California NanoSystems Institute, University of California at Los Angeles , Los Angeles, California 90095, United States
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Xu L, Li X, Zhan Z, Wang L, Feng S, Chai X, Lu W, Shen J, Weng Z, Sun J. Catalyst-Free, Selective Growth of ZnO Nanowires on SiO2 by Chemical Vapor Deposition for Transfer-Free Fabrication of UV Photodetectors. ACS Appl Mater Interfaces 2015; 7:20264-20271. [PMID: 26308593 DOI: 10.1021/acsami.5b05811] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Catalyst-free, selective growth of ZnO nanowires directly on the commonly used dielectric SiO2 layer is of both scientific significance and application importance, yet it is still a challenge. Here, we report a facile method to grow single-crystal ZnO nanowires on a large scale directly on SiO2/Si substrate through vapor-solid mechanism without using any predeposited metal catalyst or seed layer. We found that a rough SiO2/Si substrate surface created by the reactive ion etching is critical for ZnO growth without using catalyst. ZnO nanowire array exclusively grows in area etched by the reactive ion etching method. The advantages of this method include facile and safe roughness-assisted catalyst-free growth of ZnO nanowires on SiO2/Si substrate and the subsequent transfer-free fabrication of electronic or optoelectronic devices. The ZnO nanowire UV photodetector fabricated by a transfer-free process presented high performance in responsivity, quantum efficiency and response speed, even without any post-treatments. The strategy shown here would greatly reduce the complexity in nanodevice fabrication and give an impetus to the application of ZnO nanowires in nanoelectronics and optoelectronics.
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Affiliation(s)
- Liping Xu
- School of Electronics and Information Engineering, Changchun University of Science and Technology , 7089 Weixing Road, Changchun, Jilin 130022, People's Republic of China
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences , Chongqing, 400714, People's Republic of China
- Chongqing Key Laboratory of Multi-scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences , Chongqing 400714, People's Republic of China
| | - Xin Li
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences , Chongqing, 400714, People's Republic of China
- Chongqing Key Laboratory of Multi-scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences , Chongqing 400714, People's Republic of China
| | - Zhaoyao Zhan
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences , Chongqing, 400714, People's Republic of China
- Chongqing Key Laboratory of Multi-scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences , Chongqing 400714, People's Republic of China
| | - Liang Wang
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences , Chongqing, 400714, People's Republic of China
- Chongqing Key Laboratory of Multi-scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences , Chongqing 400714, People's Republic of China
| | - Shuanglong Feng
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences , Chongqing, 400714, People's Republic of China
- Chongqing Key Laboratory of Multi-scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences , Chongqing 400714, People's Republic of China
| | - Xiangyu Chai
- School of Electronics and Information Engineering, Changchun University of Science and Technology , 7089 Weixing Road, Changchun, Jilin 130022, People's Republic of China
| | - Wenqiang Lu
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences , Chongqing, 400714, People's Republic of China
- Chongqing Key Laboratory of Multi-scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences , Chongqing 400714, People's Republic of China
| | - Jun Shen
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences , Chongqing, 400714, People's Republic of China
- Chongqing Key Laboratory of Multi-scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences , Chongqing 400714, People's Republic of China
| | - Zhankun Weng
- School of Electronics and Information Engineering, Changchun University of Science and Technology , 7089 Weixing Road, Changchun, Jilin 130022, People's Republic of China
| | - Jie Sun
- College of Electronic Information and Control Engineering, Beijing University of Technology , 100 Ping Le Yuan, Chaoyang District, Beijing 100124, People's Republic of China
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45
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Sun J, Chen Y, Priydarshi MK, Chen Z, Bachmatiuk A, Zou Z, Chen Z, Song X, Gao Y, Rümmeli MH, Zhang Y, Liu Z. Direct Chemical Vapor Deposition-Derived Graphene Glasses Targeting Wide Ranged Applications. Nano Lett 2015; 15:5846-5854. [PMID: 26305883 DOI: 10.1021/acs.nanolett.5b01936] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Direct growth of graphene on traditional glasses is of great importance for various daily life applications. We report herein the catalyst-free atmospheric-pressure chemical vapor deposition approach to directly synthesizing large-area, uniform graphene films on solid glasses. The optical transparency and sheet resistance of such kinds of graphene glasses can be readily adjusted together with the experimentally tunable layer thickness of graphene. More significantly, these graphene glasses find a broad range of real applications by enabling the low-cost construction of heating devices, transparent electrodes, photocatalytic plates, and smart windows. With a practical scalability, the present work will stimulate various applications of transparent, electrically and thermally conductive graphene glasses in real-life scenarios.
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Affiliation(s)
| | | | | | - Zhang Chen
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institution of Ceramics, Chinese Academy of Sciences , Shanghai 200050, P. R. China
| | - Alicja Bachmatiuk
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences , M. Curie-Sklodowskiej 34, Zabrze 41-819, Poland
- IFW Dresden, Institute for Complex Materials, P.O. Box 270116, D-01171 Dresden, Germany
| | | | | | | | - Yanfeng Gao
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institution of Ceramics, Chinese Academy of Sciences , Shanghai 200050, P. R. China
| | - Mark H Rümmeli
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences , M. Curie-Sklodowskiej 34, Zabrze 41-819, Poland
- Department of Energy Science, Sungkyunkwan University , Suwon 440-746, Republic of Korea
- IBS Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS) , Daejon 305-701, Republic of Korea
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Taynton P, Yu K, Shoemaker RK, Jin Y, Qi HJ, Zhang W. Heat- or water-driven malleability in a highly recyclable covalent network polymer. Adv Mater 2014; 26:3938-42. [PMID: 24677455 DOI: 10.1002/adma.201400317] [Citation(s) in RCA: 338] [Impact Index Per Article: 33.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Revised: 02/20/2014] [Indexed: 05/19/2023]
Affiliation(s)
- Philip Taynton
- Department of Chemistry and Biochemistry, University of Colorado at Boulder, Boulder, CO, 80309-0215, USA
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47
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Li T, Gao L, Lei W, Guo L, Pan H, Yang T, Chen Y, Wang Z. InAs-mediated growth of vertical InSb nanowires on Si substrates. Nanoscale Res Lett 2013; 8:333. [PMID: 23883403 PMCID: PMC3726463 DOI: 10.1186/1556-276x-8-333] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Accepted: 07/06/2013] [Indexed: 05/31/2023]
Abstract
In this work, InSb nanowires are grown vertically on Si (111) with metal organic chemical vapor deposition using InAs as seed layer, instead of external metal catalyst. Two groups of InSb nanowires are fabricated and characterized: one group presents Indium droplets at the nanowire's free end, while the other, in contrast, ends without Indium droplet but with pyramid-shaped InSb. The indium-droplet-ended nanowires are longer than the other group of nanowires. For both groups of InSb nanowires, InAs layers play an important role in their formation by serving as a template for growing InSb nanowires. The results presented in this work suggest a useful approach to grow catalyst-free InSb nanowires on Si substrates, which is significant for their device applications.
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Affiliation(s)
- Tianfeng Li
- Department of Physics, School of Physics and Electronics, Henan University, Kaifeng 475004, People's Republic of China
- Key Laboratory of Semiconductor Material Science, Institute of semiconductors, Chinese Academy of Science, Beijing 100083, People's Republic of China
| | - Lizhen Gao
- Department of Physics, School of Physics and Electronics, Henan University, Kaifeng 475004, People's Republic of China
| | - Wen Lei
- School of Electrical, Electronic and Computer Engineering, The University of Western Australia, 35 Stirling Hwy, Crawley 6009, Australia
| | - Lijun Guo
- Department of Physics, School of Physics and Electronics, Henan University, Kaifeng 475004, People's Republic of China
| | - Huayong Pan
- Key Laboratory for the Physics and Chemistry of Nanodevices, and Department of Electronics, Peking University, Beijing 100871, China
| | - Tao Yang
- Key Laboratory of Semiconductor Material Science, Institute of semiconductors, Chinese Academy of Science, Beijing 100083, People's Republic of China
| | - Yonghai Chen
- Key Laboratory of Semiconductor Material Science, Institute of semiconductors, Chinese Academy of Science, Beijing 100083, People's Republic of China
| | - Zhanguo Wang
- Key Laboratory of Semiconductor Material Science, Institute of semiconductors, Chinese Academy of Science, Beijing 100083, People's Republic of China
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Xie ZB, Wang N, Wu MY, He T, Le ZG, Yu XQ. Catalyst-free and solvent-free Michael addition of 1,3-dicarbonyl compounds to nitroalkenes by a grinding method. Beilstein J Org Chem 2012; 8:534-8. [PMID: 22563352 PMCID: PMC3343280 DOI: 10.3762/bjoc.8.61] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2012] [Accepted: 03/15/2012] [Indexed: 11/23/2022] Open
Abstract
An environmentally benign, fast and convenient protocol has been developed for the Michael addition of 1,3-dicarbonyl compounds to β-nitroalkenes in good to excellent yields by a grinding method under catalyst- and solvent-free conditions.
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Affiliation(s)
- Zong-Bo Xie
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, China, 610064; ; Tel: (+86) 28-85415886
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Shalish I, Seryogin G, Yi W, Bao JM, Zimmler MA, Likovich E, Bell DC, Capasso F, Narayanamurti V. Epitaxial Catalyst-Free Growth of InN Nanorods on c-Plane Sapphire. Nanoscale Res Lett 2009; 4:532-537. [PMID: 20596436 PMCID: PMC2893868 DOI: 10.1007/s11671-009-9276-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2008] [Accepted: 02/09/2009] [Indexed: 05/29/2023]
Abstract
We report observation of catalyst-free hydride vapor phase epitaxy growth of InN nanorods. Characterization of the nanorods with transmission electron microscopy, and X-ray diffraction show that the nanorods are stoichiometric 2H-InN single crystals growing in the [0001] orientation. The InN rods are uniform, showing very little variation in both diameter and length. Surprisingly, the rods show clear epitaxial relations with the c-plane sapphire substrate, despite about 29% of lattice mismatch. Comparing catalyst-free with Ni-catalyzed growth, the only difference observed is in the density of nucleation sites, suggesting that Ni does not work like the typical vapor-liquid-solid catalyst, but rather functions as a nucleation promoter by catalyzing the decomposition of ammonia. No conclusive photoluminescence was observed from single nanorods, while integrating over a large area showed weak wide emissions centered at 0.78 and at 1.9 eV.
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Affiliation(s)
- I Shalish
- Harvard University, Cambridge, MA, 02138, USA
- Ben Gurion University, Beer Sheva, Israel
| | - G Seryogin
- Harvard University, Cambridge, MA, 02138, USA
| | - W Yi
- Harvard University, Cambridge, MA, 02138, USA
| | - JM Bao
- Harvard University, Cambridge, MA, 02138, USA
- University of Houston, Houston, TX, 77004, USA
| | - MA Zimmler
- Harvard University, Cambridge, MA, 02138, USA
| | - E Likovich
- Harvard University, Cambridge, MA, 02138, USA
| | - DC Bell
- Harvard University, Cambridge, MA, 02138, USA
| | - F Capasso
- Harvard University, Cambridge, MA, 02138, USA
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50
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Wang H, Zhang ZP, Wang XN, Mo Q, Wang Y, Zhu JH, Wang HB, Yang FJ, Jiang Y. Selective Growth of Vertical-aligned ZnO Nanorod Arrays on Si Substrate by Catalyst-free Thermal Evaporation. Nanoscale Res Lett 2008; 3:309. [PMCID: PMC3244890 DOI: 10.1007/s11671-008-9156-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2008] [Accepted: 08/05/2008] [Indexed: 05/29/2023]
Abstract
By thermal evaporation of pure ZnO powders, high-density vertical-aligned ZnO nanorod arrays with diameter ranged in 80–250 nm were successfully synthesized on Si substrates covered with ZnO seed layers. It was revealed that the morphology, orientation, crystal, and optical quality of the ZnO nanorod arrays highly depend on the crystal quality of ZnO seed layers, which was confirmed by the characterizations of field-emission scanning electron microscopy, X-ray diffraction, transmission electron microscopy, and photoluminescence measurements. For ZnO seed layer with wurtzite structure, the ZnO nanorods grew exactly normal to the substrate with perfect wurtzite structure, strong near-band-edge emission, and neglectable deep-level emission. The nanorods synthesized on the polycrystalline ZnO seed layer presented random orientation, wide diameter, and weak deep-level emission. This article provides a C-free and Au-free method for large-scale synthesis of vertical-aligned ZnO nanorod arrays by controlling the crystal quality of the seed layer.
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Affiliation(s)
- H Wang
- Faculty of Physics and Electronic Technology, Hubei University, Wuhan, 430062, People’s Republic of China
| | - ZP Zhang
- Faculty of Physics and Electronic Technology, Hubei University, Wuhan, 430062, People’s Republic of China
| | - XN Wang
- Faculty of Physics and Electronic Technology, Hubei University, Wuhan, 430062, People’s Republic of China
| | - Q Mo
- Faculty of Physics and Electronic Technology, Hubei University, Wuhan, 430062, People’s Republic of China
| | - Y Wang
- Faculty of Physics and Electronic Technology, Hubei University, Wuhan, 430062, People’s Republic of China
| | - JH Zhu
- Faculty of Physics and Electronic Technology, Hubei University, Wuhan, 430062, People’s Republic of China
| | - HB Wang
- Faculty of Physics and Electronic Technology, Hubei University, Wuhan, 430062, People’s Republic of China
| | - FJ Yang
- Faculty of Physics and Electronic Technology, Hubei University, Wuhan, 430062, People’s Republic of China
| | - Y Jiang
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
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