1
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Edwards JV, Prevost NT, Cintron MS. A Comparison of Hemostatic Activities of Zeolite-Based Formulary Finishes on Cotton Dressings. J Funct Biomater 2023; 14:jfb14050255. [PMID: 37233365 DOI: 10.3390/jfb14050255] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 04/22/2023] [Accepted: 04/26/2023] [Indexed: 05/27/2023] Open
Abstract
The need for affordable effective prehospital hemostatic dressings to control hemorrhage has led to an increased interest in new dressing design approaches. Here we consider the separate components of fabric, fiber, and procoagulant nonexothermic zeolite-based formulations on design approaches to accelerated hemostasis. The design of the fabric formulations was based on incorporation of zeolite Y as the principal procoagulant, with calcium and pectin to adhere and enhance the activity. Unbleached nonwoven cotton when combined with bleached cotton displays enhanced properties related to hemostasis. Here, we compare sodium zeolite with ammonium zeolite formulated on fabrics utilizing pectin with pad versus spray-dry-cure and varied fiber compositions. Notably, ammonium as a counterion resulted in shorter times to fibrin and clot formation comparable to the procoagulant standard. The time to fibrin formation as measured by thromboelastography was found to be within a range consistent with modulating severe hemorrhage control. The results indicate a correlation between fabric add-on and accelerated clotting as measured by both time to fibrin and clot formation. A comparison between the time to fibrin formation in calcium/pectin formulations and pectin alone revealed an enhanced clotting effect with calcium decreasing by one minute the time to fibrin formation. Infra-red spectra were employed to characterize and quantify the zeolite formulations on the dressings.
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Affiliation(s)
- J Vincent Edwards
- Southern Regional Research Center, United States Department of Agriculture (USDA), Agricultural Research Service, New Orleans, LA 70124, USA
| | - Nicolette T Prevost
- Southern Regional Research Center, United States Department of Agriculture (USDA), Agricultural Research Service, New Orleans, LA 70124, USA
| | - Michael Santiago Cintron
- Southern Regional Research Center, United States Department of Agriculture (USDA), Agricultural Research Service, New Orleans, LA 70124, USA
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2
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Gong X, Çağlayan M, Ye Y, Liu K, Gascon J, Dutta Chowdhury A. First-Generation Organic Reaction Intermediates in Zeolite Chemistry and Catalysis. Chem Rev 2022; 122:14275-14345. [PMID: 35947790 DOI: 10.1021/acs.chemrev.2c00076] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Zeolite chemistry and catalysis are expected to play a decisive role in the next decade(s) to build a more decentralized renewable feedstock-dependent sustainable society owing to the increased scrutiny over carbon emissions. Therefore, the lack of fundamental and mechanistic understanding of these processes is a critical "technical bottleneck" that must be eliminated to maximize economic value and minimize waste. We have identified, considering this objective, that the chemistry related to the first-generation reaction intermediates (i.e., carbocations, radicals, carbenes, ketenes, and carbanions) in zeolite chemistry and catalysis is highly underdeveloped or undervalued compared to other catalysis streams (e.g., homogeneous catalysis). This limitation can often be attributed to the technological restrictions to detect such "short-lived and highly reactive" intermediates at the interface (gas-solid/solid-liquid); however, the recent rise of sophisticated spectroscopic/analytical techniques (including under in situ/operando conditions) and modern data analysis methods collectively compete to unravel the impact of these organic intermediates. This comprehensive review summarizes the state-of-the-art first-generation organic reaction intermediates in zeolite chemistry and catalysis and evaluates their existing challenges and future prospects, to contribute significantly to the "circular carbon economy" initiatives.
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Affiliation(s)
- Xuan Gong
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei P. R. China
| | - Mustafa Çağlayan
- KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST), Thuwal 23955, Saudi Arabia
| | - Yiru Ye
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei P. R. China
| | - Kun Liu
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei P. R. China
| | - Jorge Gascon
- KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST), Thuwal 23955, Saudi Arabia
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3
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Abstract
A few months before the COVID-19 pandemic, Pierre Vogel and Kendall N. Houk published with a new textbook Wiley-VCH, “Organic Chemistry: Theory, Reactivity, and Mechanisms in Modern Synthesis”, with a foreword from the late Roberts H. Grubbs. The book demonstrates how catalytic processes dominate all fields of modern organic chemistry and synthesis, and how invention combines thermodynamics, kinetics, spectroscopy, quantum mechanics, and thermochemical data libraries. Here, the authors present a few case studies that should be of interest to teachers, practitioners of organic and organometallic chemistry, and the engineers of molecules. The Vogel–Houk book is both textbook and reference manual; it provides a modern way to think about chemical reactivity and a powerful toolbox to inventors of new reactions and new procedures.
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Shuvarakova EI, Bedilo AF, Kenzhin RM, Ilyina EV, Gerus YY. Synthesis and Investigation of Finely Dispersed Calcium Aluminates and Catalysts Based on Them. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2022. [DOI: 10.1134/s199079312203023x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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5
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Zhang L, Lai Q, Liu Y, Li X, Zhang W, Xu X, Fang X, Xu J, Wang X. Study on the monolayer dispersion behavior of SnO 2 on ZSM-5 for NO x-SCR by C 3H 6: the remarkable promotional effects of air plasma treatment. Phys Chem Chem Phys 2022; 24:4212-4225. [PMID: 35128555 DOI: 10.1039/d1cp05567d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Aiming to fabricate more practical catalysts for NOx-SCR with C3H6, SnO2/ZSM-5 having different SnO2 loadings was prepared and treated with DBD air plasma. The dispersion of SnO2 on the H-ZSM-5 support and their interactions were investigated with both experimental methods and DFT calculations. SnO2 displays evident monolayer dispersion behavior, getting a threshold of 0.271 mmol 100 m-2 support. Plasma treatment improves significantly the SnO2 dispersion, hence amplifying the monolayer dispersion threshold to 0.380 mmol 100 m-2. XPS and DFT calculations have testified that plasma treatment strengthens strongly the SnO2-ZSM-5 support interaction, mainly through donating electrons from Sn4+ to Al3+ in the support, thus improving the dispersion of SnO2 at the same loadings. Consequently, the catalytic performance is remarkably improved because of the generation of more abundant surface acid sites and superoxide species devoted to the reaction. The sample having a SnO2 loading near the monolayer dispersion threshold shows the optimal activity in the corresponding catalyst series, demonstrating an evident threshold effect. Over SnO2/ZSM-5, the reaction goes through a Langmuir-Hinshelwood pathway, involving the adsorption and activation of both NO and C3H6 molecules. Surface mono-dentate/bridged-nitrate and carbonate species are the main reaction intermediates.
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Affiliation(s)
- Lihong Zhang
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry, Nanchang University, Nanchang, Jiangxi 330031, China.
| | - Qiang Lai
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry, Nanchang University, Nanchang, Jiangxi 330031, China.
| | - Yaqian Liu
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry, Nanchang University, Nanchang, Jiangxi 330031, China.
| | - Xian Li
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry, Nanchang University, Nanchang, Jiangxi 330031, China.
| | - Wenqi Zhang
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry, Nanchang University, Nanchang, Jiangxi 330031, China.
| | - Xianglan Xu
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry, Nanchang University, Nanchang, Jiangxi 330031, China.
| | - Xiuzhong Fang
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry, Nanchang University, Nanchang, Jiangxi 330031, China.
| | - Junwei Xu
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry, Nanchang University, Nanchang, Jiangxi 330031, China.
| | - Xiang Wang
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry, Nanchang University, Nanchang, Jiangxi 330031, China.
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6
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Zhao X, Cheng P, Borch T, Waigi MG, Peng F, Gao Y. Humidity induces the formation of radicals and enhances photodegradation of chlorinated-PAHs on Fe(III)-montmorillonite. JOURNAL OF HAZARDOUS MATERIALS 2022; 423:127210. [PMID: 34555768 DOI: 10.1016/j.jhazmat.2021.127210] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Revised: 08/25/2021] [Accepted: 09/09/2021] [Indexed: 06/13/2023]
Abstract
Chlorinated-PAHs (ClPAHs) are widely detected in the soil surface and atmospheric particles. However, the underlying mechanisms of their photodegradation are not well understood. In the present study, the formation of radicals on ClPAHs-contaminated clay minerals was quantitatively monitored via electron paramagnetic resonance (EPR) spectroscopy, and the impact of relative humidity (RH) was systematically explored. ClPAHs removal (> 75%) was attributed to electron transfer and •OH attack. The degradation easiness of ClPAHs follows: 2-ClNAP >2-ClANT >9-ClPHE >1-ClPYR. Light irradiation significantly improved the generation of reactive oxygen species (ROS, such as •OH and •O2-), and further generate a series of hydroxylated products of ClPAHs. Persistent free radicals (PFRs) were only detected on clay minerals contaminated with 2-ClANT and 1-ClPYR. RH 10-80%, the concentration of •OH and •O2- increased by 1.07 and 62.79 times respectively, which facilitated transformation of PFRs and ClPAHs degradation. The results of quantum chemical calculations indicate that the initial reaction of ClPAHs photodegradation is mediated by the substitution of •OH for chlorine groups. The present work implies that higher humidity may decrease the generation of PFRs on clay minerals and help mitigate the threats of PFRs and ClPAHs to human health.
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Affiliation(s)
- Xuqiang Zhao
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Pengfei Cheng
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Thomas Borch
- Department of Soil and Crop Sciences, Colorado State University, Fort Collins, CO 80523-1170, United States; Department of Chemistry; Colorado State University, Fort Collins, CO 80523, United States
| | - Michael Gatheru Waigi
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Fei Peng
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Yanzheng Gao
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China.
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7
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Lemmens V, Vos C, Bugaev AL, Vercammen J, Van Velthoven N, Gascon J, De Vos DE. Ru-Bipyridine Entrapped in the Supercages of EMC-1 Faujasite as Catalyst for the Trifluoromethylation of Arenes. ACS APPLIED MATERIALS & INTERFACES 2022; 14:971-977. [PMID: 34958546 DOI: 10.1021/acsami.1c19655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Trifluoromethyl (CF3) groups are versatile structural motifs especially in the field of agrochemicals and pharmaceuticals. However, current trifluoromethylation reactions are generally associated with stoichiometric amounts of transition metals/metal oxidants, homogeneous catalysts, high temperatures, and expensive trifluoromethylating agents. In this work, the homogeneous photocatalyst Ru(bipy)32+ is entrapped in the pores of a faujasite support (EMC-1) via a "ship-in-a-bottle" strategy. The formation of the coordination compound was confirmed by Fourier transform infrared (FTIR), UV-Vis spectroscopy, and X-ray absorption spectroscopy (XAS). Due to its high stability toward acidified environments, this single-site heterogeneous catalyst is suitable for the trifluoromethylation of synthetically interesting (hetero)arenes under visible-light irradiation at room temperature. Furthermore, the heterogeneous catalyst could efficiently be reused for at least three times with minimal catalyst leaching/deactivation.
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Affiliation(s)
- Vincent Lemmens
- Centre For Membrane Separations, Adsorption, Catalysis, and Spectroscopy for Sustainable Solutions (cMACs), KU Leuven, Leuven 3001, Belgium
| | - Christophe Vos
- Centre For Membrane Separations, Adsorption, Catalysis, and Spectroscopy for Sustainable Solutions (cMACs), KU Leuven, Leuven 3001, Belgium
| | - Aram L Bugaev
- The Smart Materials Research Institute, Southern Federal University, Rostov-on-Don 344090, Russia
| | - Jannick Vercammen
- Centre For Membrane Separations, Adsorption, Catalysis, and Spectroscopy for Sustainable Solutions (cMACs), KU Leuven, Leuven 3001, Belgium
| | - Niels Van Velthoven
- Centre For Membrane Separations, Adsorption, Catalysis, and Spectroscopy for Sustainable Solutions (cMACs), KU Leuven, Leuven 3001, Belgium
| | - Jorge Gascon
- King Abdullah University of Science and Technology (KAUST), Thuwal 23955, Saudi Arabia
| | - Dirk E De Vos
- Centre For Membrane Separations, Adsorption, Catalysis, and Spectroscopy for Sustainable Solutions (cMACs), KU Leuven, Leuven 3001, Belgium
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8
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Zheng L, Zhu W, Zhou Z, Liu K, Gao M, Tang BZ. Red-to-NIR emissive radical cations derived from simple pyrroles. MATERIALS HORIZONS 2021; 8:3082-3087. [PMID: 34505616 DOI: 10.1039/d1mh01121a] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Red-to-near-infrared (NIR) fluorophores are highly desirable in bio-imaging studies with advantages of high tissue penetration ability and less interference from auto-fluorescence. However, their preparation usually requires tedious synthetic procedures, which seriously restrict their applications. Thus, the direct preparation of red-to-NIR fluorophores from easily available substrates is highly desirable. Compared with the conventional closed-shell fluorophores, radical cations feature a large red-shift absorption, but only very few of them are fluorescent and they suffer from high instability. Herein, we proposed a convenient strategy for the preparation of red-to-NIR fluorophores through air oxidation of electron-rich 2,5-dimethylpyrroles to in situ generate red-to-NIR emissive radical cations, which can be stabilized by adsorption on silica gel-coated thin layer chromatography (TLC) plates or encapsulated in cucurbit[7]uril (CB[7]). The radical cations derived from pyrroles were verified using electron paramagnetic resonance (EPR) spectroscopy, theoretical calculations and one-electron oxidation experiments. Moreover, the pyrrole-derived radical cations encapsulated in CB[7] can be used for mitochondrial imaging in living cells with high specificity and in vivo imaging with long-term stability. The easily available pyrrole-derived radical cations with red-to-NIR emission are thus promising for biomedical applications.
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Affiliation(s)
- Lihua Zheng
- National Engineering Research Center for Tissue Restoration and Reconstruction, Key Laboratory of Biomedical Engineering of Guangdong Province, Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education, Innovation Center for Tissue Restoration and Reconstruction, School of Biomedical Science and Engineering, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510006, China.
| | - Wenchao Zhu
- National Engineering Research Center for Tissue Restoration and Reconstruction, Key Laboratory of Biomedical Engineering of Guangdong Province, Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education, Innovation Center for Tissue Restoration and Reconstruction, School of Biomedical Science and Engineering, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510006, China.
| | - Zikai Zhou
- National Engineering Research Center for Tissue Restoration and Reconstruction, Key Laboratory of Biomedical Engineering of Guangdong Province, Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education, Innovation Center for Tissue Restoration and Reconstruction, School of Biomedical Science and Engineering, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510006, China.
| | - Kai Liu
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China.
| | - Meng Gao
- National Engineering Research Center for Tissue Restoration and Reconstruction, Key Laboratory of Biomedical Engineering of Guangdong Province, Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education, Innovation Center for Tissue Restoration and Reconstruction, School of Biomedical Science and Engineering, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510006, China.
| | - Ben Zhong Tang
- AIE institute, State Key Laboratory of Luminescent Materials and Devices, Center for Aggregation-Induced Emission, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, Guangzhou International Campus, South China University of Technology, Guangzhou 510640, China
- Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction and Institute for Advanced Study, The Hong Kong University of Science and Technology, Hong Kong 999077, China
- Shenzhen Institute of Aggregate Science and Technology, School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen 518172, China.
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9
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Raman G. Study of the Relationship between Synthesis Descriptors and the Type of Zeolite Phase Formed in ZSM‐43 Synthesis by Using Machine Learning. ChemistrySelect 2021. [DOI: 10.1002/slct.202102890] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ganesan Raman
- Reliance Research & Development Center Reliance Corporate Park, Reliance Industries Limited Thane-Belapur Road, Ghansoli Navi Mumbai India 400701
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10
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Yurpalov VL, Neponiashchii AA, Drozdov VA, Antonicheva NV, Buluchevskiy EA, Lavrenov AV. The deactivation of acidic sites of NiMo/B 2 O 3 -Al 2 O 3 catalysts during vegetable oil hydrodeoxygenation studied by EPR spectroscopy. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2021; 59:600-607. [PMID: 33368711 DOI: 10.1002/mrc.5126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 12/18/2020] [Accepted: 12/22/2020] [Indexed: 06/12/2023]
Abstract
This paper presents the study results of NiMo/B2 O3 -Al2 O3 (0-30% wt. of B2 O3 ) catalysts for vegetable oil hydrodeoxygenation before and after catalytic tests by different electron paramagnetic resonance (EPR) methodologies. For the initial catalysts, the concentration of Brønsted acidic sites (BAS) determined by probe EPR with perylene increases linearly with an increase in the modifier (B2 O3 ) content in the samples. It was found that the isomerization activity of the catalysts increases with increasing the concentration of determined BAS. As for the spent catalysts, linear correlation of paramagnetic species concentration with the content of carbon deposits (determined by thermogravimetric analysis [TGA]/differential thermal analysis [DTA]) was found. The main reasons for the NiMo/B2 O3 -Al2 O3 catalysts deactivation over the formation of carbon deposits related to the participation of acidic sites (both Lewis and Brønsted) in the polycondensation of hydrocarbons via radical species are also proposed.
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Affiliation(s)
- Vyacheslav L Yurpalov
- Center of New Chemical Technologies BIC, Boreskov Institute of Catalysis, Omsk, Russia
| | | | - Vladimir A Drozdov
- Center of New Chemical Technologies BIC, Boreskov Institute of Catalysis, Omsk, Russia
| | - Nina V Antonicheva
- Center of New Chemical Technologies BIC, Boreskov Institute of Catalysis, Omsk, Russia
| | | | - Aleksandr V Lavrenov
- Center of New Chemical Technologies BIC, Boreskov Institute of Catalysis, Omsk, Russia
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11
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Lai Q, Liu Y, Zhang L, Li X, Qiu Z, Xu X, Fang X, Xu J, Wang X. Expounding the monolayer dispersion threshold effect of SnO2/Beta catalysts on the selective catalytic reduction of NOx (NOx-SCR) by C3H6. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2021.111464] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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12
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López‐de‐Luzuriaga JM, Monge M, Moreno S, Olmos ME, Rodríguez‐Castillo M. Rational Assembly of Metallophilic Gold(I)–Lead(II) and Gold(I)–Gold(I) Puzzle Pieces. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202010095] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- José M. López‐de‐Luzuriaga
- Departamento de Química Centro de Investigación en Síntesis Química (CISQ) Universidad de La Rioja Complejo Científico-Tecnológico 26006 Logroño Spain
| | - Miguel Monge
- Departamento de Química Centro de Investigación en Síntesis Química (CISQ) Universidad de La Rioja Complejo Científico-Tecnológico 26006 Logroño Spain
| | - Sonia Moreno
- Departamento de Química Centro de Investigación en Síntesis Química (CISQ) Universidad de La Rioja Complejo Científico-Tecnológico 26006 Logroño Spain
| | - M. Elena Olmos
- Departamento de Química Centro de Investigación en Síntesis Química (CISQ) Universidad de La Rioja Complejo Científico-Tecnológico 26006 Logroño Spain
| | - María Rodríguez‐Castillo
- Departamento de Química Centro de Investigación en Síntesis Química (CISQ) Universidad de La Rioja Complejo Científico-Tecnológico 26006 Logroño Spain
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13
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López‐de‐Luzuriaga JM, Monge M, Moreno S, Olmos ME, Rodríguez‐Castillo M. Rational Assembly of Metallophilic Gold(I)–Lead(II) and Gold(I)–Gold(I) Puzzle Pieces. Angew Chem Int Ed Engl 2020; 60:640-644. [DOI: 10.1002/anie.202010095] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Indexed: 11/08/2022]
Affiliation(s)
- José M. López‐de‐Luzuriaga
- Departamento de Química Centro de Investigación en Síntesis Química (CISQ) Universidad de La Rioja Complejo Científico-Tecnológico 26006 Logroño Spain
| | - Miguel Monge
- Departamento de Química Centro de Investigación en Síntesis Química (CISQ) Universidad de La Rioja Complejo Científico-Tecnológico 26006 Logroño Spain
| | - Sonia Moreno
- Departamento de Química Centro de Investigación en Síntesis Química (CISQ) Universidad de La Rioja Complejo Científico-Tecnológico 26006 Logroño Spain
| | - M. Elena Olmos
- Departamento de Química Centro de Investigación en Síntesis Química (CISQ) Universidad de La Rioja Complejo Científico-Tecnológico 26006 Logroño Spain
| | - María Rodríguez‐Castillo
- Departamento de Química Centro de Investigación en Síntesis Química (CISQ) Universidad de La Rioja Complejo Científico-Tecnológico 26006 Logroño Spain
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14
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Yurpalov VL, Stepanova LN, Drozdov VA, Belskaya OB. The application of 1,3,5-trinitrobenzene as a spin probe for the surface basic sites study of MgAl double oxides by EPR spectroscopy. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124733] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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15
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Hureau M, Moissette A, Gaillard J. Determination of Electronic Recombination Free Energy in Zeolites: Effects of the Charge Balancing Cation and Confinement. Chemphyschem 2020; 21:1280-1288. [DOI: 10.1002/cphc.202000250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 04/17/2020] [Indexed: 11/06/2022]
Affiliation(s)
- Matthieu Hureau
- LASIRE, Bât. C5 Faculté des Sciences et TechnologiesUniversité de Lille 59655 Villeneuve d'Ascq cedex France
| | - Alain Moissette
- LASIRE, Bât. C5 Faculté des Sciences et TechnologiesUniversité de Lille 59655 Villeneuve d'Ascq cedex France
| | - Jérémy Gaillard
- LASIRE, Bât. C5 Faculté des Sciences et TechnologiesUniversité de Lille 59655 Villeneuve d'Ascq cedex France
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16
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Duplouy L, Moissette A, Hureau M, De Waele V, Daou TJ, Batonneau-Gener I. Effect of zeolite morphology on charge separated states: ZSM-5-type nanocrystals, nanosheets and nanosponges. Phys Chem Chem Phys 2020; 22:12015-12027. [PMID: 32421132 DOI: 10.1039/d0cp01701a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
In the present work, we investigate the electron transfer occurring in the porous void of three MFI-type zeolite (ZSM-5) nanomaterials (nanocrystals, nanosheets and nanosponges) after adsorption and photoexcitation of t-stilbene (t-St). ZSM-5 nanosheets are constituted of lamellar stacking of several nanosheets (20-40 nm) where each nanosheet has a thickness of 2 nm. Nanosponges are composed of ZSM-5 nanocrystals (2-3 nm) separated by mesoporous holes of 5.8 nm facilitating the synthesis of hierachical materials. While the nanosheets show microporosity similar to that observed for the ZSM-5 nanocrystals, the absorption isotherms of the nanosponges show the existence of secondary micropores. After photoirradiation of t-St, UV-vis absorption spectroscopy shows the formation of charge separated states (radical cation and charge transfer complex) in the nanocrystals and in the nanosheets whereas no ionized species is detected in the nanosponges. The radical cation (RC) is stabilized in the nanosheets while it evolves very rapidly towards a Charge Transfer Complex (CTC) in the nanocrocrystals. The particular morphology of the nanosheets and nanosponges is put forward to explain this result since all host materials are of the MFI-type. To investigate ultra-short phenomena in the three nanomaterials, the UV-vis transient spectra were recorded between 2 and 450 μs after photoexcitation by nanosecond laser pulses. In the nanocrystals and nanosheets only the RC is detected whereas CTC formation is not observed. Photoexcitation of t-St in the nanosponges also leads to the formation of a RC but it recombines completely within 70 μs. This suggests the preferential location of t-St in the secondary micropores with pores larger than the micropores of the MFI-type framework and possibly in the mesopores of the nanosponges.
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Affiliation(s)
- Lucie Duplouy
- LASIRE, Bât. C5, Faculté des Sciences et Technologies, Université de Lille, 59655 Villeneuve d'Ascq Cedex, France.
| | - Alain Moissette
- LASIRE, Bât. C5, Faculté des Sciences et Technologies, Université de Lille, 59655 Villeneuve d'Ascq Cedex, France.
| | - Matthieu Hureau
- LASIRE, Bât. C5, Faculté des Sciences et Technologies, Université de Lille, 59655 Villeneuve d'Ascq Cedex, France.
| | - Vincent De Waele
- LASIRE, Bât. C5, Faculté des Sciences et Technologies, Université de Lille, 59655 Villeneuve d'Ascq Cedex, France.
| | - T Jean Daou
- Université de Haute Alsace (UHA), CNRS, IS2M (Institut de Science des Matériaux de Mulhouse), UMR 7361, F-68100 Mulhouse, France and Université de Strasbourg, France
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17
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Tang B, Zhao J, Xu JF, Zhang X. Tuning the stability of organic radicals: from covalent approaches to non-covalent approaches. Chem Sci 2020; 11:1192-1204. [PMID: 34123243 PMCID: PMC8148027 DOI: 10.1039/c9sc06143f] [Citation(s) in RCA: 85] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Accepted: 12/26/2019] [Indexed: 12/22/2022] Open
Abstract
Organic radicals are important species with single electrons. Because of their open-shell structure, they are widely used in functional materials, such as spin probes, magnetic materials and optoelectronic materials. Owing to the high reactivity of single electrons, they often serve as a key intermediate in organic synthesis. Therefore, tuning the stability of radicals is crucial for their functions. Herein, we summarize covalent and non-covalent approaches to tune the stability of organic radicals through steric effects and tuning the delocalization of spin density. Covalent approaches can tune the stability of radicals effectively and non-covalent approaches benefit from dynamicity and reversibility. It is anticipated that the further development of covalent and non-covalent approaches, as well as the interplay between them, may push the fields forward by enriching new radical materials and radical mediated reactions.
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Affiliation(s)
- Bohan Tang
- Key Laboratory of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University Beijing 100084 China
| | - Jiantao Zhao
- Key Laboratory of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University Beijing 100084 China
| | - Jiang-Fei Xu
- Key Laboratory of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University Beijing 100084 China
| | - Xi Zhang
- Key Laboratory of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University Beijing 100084 China
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18
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Talsi VP, Belskaya OB, Yurpalov VL. The composition of transformation products of 2,4,6-trinitrobenzoic acid in the aqueous-phase hydrogenation over Pd/C catalysts. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2020; 58:84-96. [PMID: 31361050 DOI: 10.1002/mrc.4931] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 07/23/2019] [Accepted: 07/24/2019] [Indexed: 06/10/2023]
Abstract
Due to a detailed analysis of NMR spectra of the reaction solutions with different composition obtained by the aqueous-phase catalytic (Pd/C) hydrogenation of 2,4,6-trinitrobenzoic acid, the intermediate compounds were identified and a more substantiated mechanism was proposed for the formation of the main reaction products-1,3,5-triaminobenzene and cyclohexane-1,3,5-trione trioxime. The condensation of the 1,3,5-triaminobenzene molecules produced by a complete hydrogenation of 2,4,6-trinitrobenzoic acid was shown to result in the formation of a paramagnetic heterocyclic compound.
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Affiliation(s)
- Valentin P Talsi
- Center of New Chemical Technologies of the Federal Research Center Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Omsk, Russia
| | - Olga B Belskaya
- Center of New Chemical Technologies of the Federal Research Center Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Omsk, Russia
- Department of Chemical Technology, Omsk State Technical University, Omsk, Russia
| | - Vyacheslav L Yurpalov
- Center of New Chemical Technologies of the Federal Research Center Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Omsk, Russia
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19
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Moissette A, Hureau M, Moreau M, Cornard JP. Pore selectivity and electron transfers in HZSM-5 single crystals: a Raman microspectroscopy mapping and confocal fluorescence imaging combined study. Phys Chem Chem Phys 2020; 22:12745-12756. [DOI: 10.1039/d0cp02018d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Electron transfers at the single particle level in HZSM-5 zeolite are followed by combining Raman microspectroscopy mapping and confocal fluorescence imaging. The effects of pore accessibility and guest diffusion on reactivity are investigated.
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Affiliation(s)
- A. Moissette
- LASIRE, Bât. C5
- Faculté des Sciences et Technologies
- Université de Lille
- 59655 Villeneuve d’Ascq cedex
- France
| | - M. Hureau
- LASIRE, Bât. C5
- Faculté des Sciences et Technologies
- Université de Lille
- 59655 Villeneuve d’Ascq cedex
- France
| | - M. Moreau
- LASIRE, Bât. C5
- Faculté des Sciences et Technologies
- Université de Lille
- 59655 Villeneuve d’Ascq cedex
- France
| | - J. P. Cornard
- LASIRE, Bât. C5
- Faculté des Sciences et Technologies
- Université de Lille
- 59655 Villeneuve d’Ascq cedex
- France
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20
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Assignment of the electronic transition of phenothiazine radical cation in the visible region– a resonance Raman spectroscopy and theoretical calculation investigation. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.04.053] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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21
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Hessou EP, Ponce-Vargas M, Mensah JB, Tielens F, Santos JC, Badawi M. Dibenzyl Disulfide Adsorption on Cationic Exchanged Faujasites: A DFT Study. NANOMATERIALS 2019; 9:nano9050715. [PMID: 31071952 PMCID: PMC6566968 DOI: 10.3390/nano9050715] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2019] [Revised: 04/26/2019] [Accepted: 04/30/2019] [Indexed: 11/29/2022]
Abstract
Although dibenzyl disulfide (DBDS) is used as a mineral oil stabilizer, its presence in electrical transformer oil is associated as one of the major causes of copper corrosion and subsequent formation of copper sulfide. In order to prevent these undesirable processes, MY zeolites (with M = Li, Na, K, Cs, Cu or Ag) are proposed to adsorb molecularly DBDS. In this study, different MY zeolites are investigated at the DFT+D level in order to assess their ability in DBDS adsorption. It was found that CsY, AgY and CuY exhibit the best compromise between high interaction energies and limited S-S bond activation, thus emerging as optimal adsorbents for DBDS.
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Affiliation(s)
- Etienne Paul Hessou
- Laboratoire de Physique et Chimie Théoriques, Faculté des Sciences et Technologies, CNRS, Université de Lorraine, Boulevard des Aiguillettes, 54500 Vandoeuvre-lès-Nancy, France.
- Laboratoire de Chimie Théorique et de Spectroscopie Moléculaire, Université d'Abomey-Calavi, 03 BP 3409 Cotonou, Benin.
| | - Miguel Ponce-Vargas
- Institut de Chimie Moléculaire de Reims, Université de Reims Champagne-Ardenne, 51687 Reims, France.
| | - Jean-Baptiste Mensah
- Laboratoire de Chimie Théorique et de Spectroscopie Moléculaire, Université d'Abomey-Calavi, 03 BP 3409 Cotonou, Benin.
| | - Frederik Tielens
- Chemistry (ALGC), Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussel, Belgium.
| | - Juan Carlos Santos
- Laboratorio de Corrosión, Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, Av. República 330, 8370186 Santiago, Chile.
| | - Michael Badawi
- Laboratoire de Physique et Chimie Théoriques, Faculté des Sciences et Technologies, CNRS, Université de Lorraine, Boulevard des Aiguillettes, 54500 Vandoeuvre-lès-Nancy, France.
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22
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Rhodes CJ. Reactive Radicals on Reactive Surfaces: Heterogeneous Processes in Catalysis and Environmental Pollution Control. PROGRESS IN REACTION KINETICS AND MECHANISM 2019. [DOI: 10.3184/007967405779134038] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Many reactions that occur on solid surfaces are mediated by free radicals. A review is presented of both mechanistic and practical investigations in relation to catalysis and environmental applications. The review begins with actual imaging of surface adsorbed reactive radicals using scanning tunnelling microscopy (STM), and then discusses a range of examples, mainly as underpinned by electron spin resonance (ESR) measurements. Included are surface defects and their reactions, studies of the redox behaviour of zeolites, and the use of radicals adsorbed in zeolites as molecular surface probes of diffusion and reactivity within these important materials. Photocatalysis, mainly using TiO2-based materials, is reviewed both from the fundamental perspective and in terms of some practical examples relating to pollution control. Other reactive oxide surfaces are considered, including silica, and the nature of paramagnetic centres that may be induced thereon by a variety of activation procedures. Evidence is presented for the formation of radical species during heterogeneous reactions on metal surfaces. Finally, the role of free radical generation in creating and modifying polymer and nanomolecular systems is discussed, and the health implications of the ability of some solids such as quartz to generate reactive oxygen radicals in contact with biological media.
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23
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Crémoux T, Batonneau-Gener I, Moissette A, Paillaud JL, Hureau M, Ligner E, Morais C, Laforge S, Marichal C, Nouali H. Influence of framework Si/Al ratio and topology on electron transfers in zeolites. Phys Chem Chem Phys 2019; 21:14892-14903. [DOI: 10.1039/c9cp01166h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
From experimental results on H-ZSM-5 and H-*BEA zeolites, it is shown that the stability of radical cations and of charge transfer complexes (CTC) is highly dependent on the distance between Brønsted sites and strong Lewis sites or Brønsted Strong Lewis Pairs (BSLPs).
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Affiliation(s)
- T. Crémoux
- LASIR
- Université de Lille
- Villeneuve d’Ascq 59655
- France
| | | | - A. Moissette
- LASIR
- Université de Lille
- Villeneuve d’Ascq 59655
- France
| | - J.-L. Paillaud
- Université de Haute Alsace
- CNRS
- IS2M UMR 7361
- F-68100 Mulhouse
- France
| | - M. Hureau
- LASIR
- Université de Lille
- Villeneuve d’Ascq 59655
- France
| | - E. Ligner
- Université de Haute Alsace
- CNRS
- IS2M UMR 7361
- F-68100 Mulhouse
- France
| | - C. Morais
- IC2MP
- Université de Poitiers
- Poitiers 86073
- France
| | - S. Laforge
- IC2MP
- Université de Poitiers
- Poitiers 86073
- France
| | - C. Marichal
- Université de Haute Alsace
- CNRS
- IS2M UMR 7361
- F-68100 Mulhouse
- France
| | - H. Nouali
- Université de Haute Alsace
- CNRS
- IS2M UMR 7361
- F-68100 Mulhouse
- France
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24
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Cremoux T, Batonneau-Gener I, Moissette A, Paillaud JL, Hureau M, Ligner E, Morais C, Laforge S, Marichal C, Nouali H. Influence of hierarchization on electron transfers in structured MFI-type zeolites. Phys Chem Chem Phys 2018; 20:26903-26917. [PMID: 30346020 DOI: 10.1039/c8cp03485k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
H-ZSM-5 zeolite (Si/Al = 19.3) was hydrothermally synthesized. Alkaline and/or acid post-synthesis treatments were carried out to give rise to an interconnected mesoporous volume. The desilication treatment parameters have been tuned (temperature, organic base addition) to obtain a series of samples with increasing mesoporous volume and a constant number of acid sites. The physico-chemical properties of the resulting materials were fully characterized by many techniques (NMR, BET, PXRD, and pyridine thermal desorption followed by infrared spectroscopy). To assess the effect of post-treatments on sample reactivity, the charge separation processes between the zeolite framework and adsorbed trans-stilbene (t-St) molecule were investigated by UV-visible diffuse reflectance. The spectra obtained after t-St adsorption show clear differences depending on the applied post-treatments. It appears that the desilication treatments performed without acidic washing highly stabilize the radical cation resulting from the t-St spontaneous ionization. In contrast, by applying acidic washing after desilication, the ionization process becomes significantly weaker. The results show that the proportion of strong Lewis acid sites in the vicinity of Brønsted sites named Brønsted Strong Lewis Pairs (BSLP), are responsible for the amount of radical cations observed in the different samples. More precisely, it exists an optimal proportion of BSLP to achieve a high ionization rate. On the basis of the experimental results a mechanism for the formation of the t-St radical cation and the charge transfer complex (CTC) is proposed.
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Affiliation(s)
- T Cremoux
- LASIR, Université de Lille 1, Villeneuve d'Ascq 59655, France.
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25
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Shuvarakova EI, Bedilo AF, Chesnokov VV, Kenzhin RM. Dehydrochlorination of 1-Chlorobutane Over Nanocrystalline MgO: The Role of Electron-Acceptor Sites. Top Catal 2018. [DOI: 10.1007/s11244-018-1000-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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26
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Ogawa S, Wakayama T, Watanabe H, Hayashi K, Ogata S, Oaki Y, Hasegawa M, Imai H. Enhanced Quantum Yield of Fluorophores in Confined Spaces of Supermicroporous Silicas. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2018. [DOI: 10.1246/bcsj.20170291] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Shumpei Ogawa
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522
| | - Takuya Wakayama
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522
| | - Hiroto Watanabe
- Tokyo Metropolitan Industrial Technology Research Institute, 2-4-10 Aomi, Koto-ku, Tokyo 135-0064
| | - Kosei Hayashi
- Tokyo Metropolitan Industrial Technology Research Institute, 2-4-10 Aomi, Koto-ku, Tokyo 135-0064
| | - Shuhei Ogata
- College of Science and Engineering, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5258
| | - Yuya Oaki
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522
| | - Miki Hasegawa
- College of Science and Engineering, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5258
| | - Hiroaki Imai
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522
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27
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Li T, Tan G, Cheng C, Zhao Y, Zhang L, Wang X. Syntheses, structures and theoretical calculations of stable triarylarsine radical cations. Chem Commun (Camb) 2018; 54:1493-1496. [DOI: 10.1039/c7cc09544a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two stable triarylarsine radical cation salts have been synthesized and fully characterized by X-ray crystallography and EPR spectroscopy.
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Affiliation(s)
- Tao Li
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
- Nanjing 210023
| | - Gengwen Tan
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
- Nanjing 210023
| | - Cheng Cheng
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
- Nanjing 210023
| | - Yue Zhao
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
- Nanjing 210023
| | - Li Zhang
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
- Nanjing 210023
| | - Xinping Wang
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
- Nanjing 210023
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28
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Snyder BER, Bols ML, Schoonheydt RA, Sels BF, Solomon EI. Iron and Copper Active Sites in Zeolites and Their Correlation to Metalloenzymes. Chem Rev 2017; 118:2718-2768. [DOI: 10.1021/acs.chemrev.7b00344] [Citation(s) in RCA: 193] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Benjamin E. R. Snyder
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Max L. Bols
- Department of Microbial and Molecular Systems, Centre for Surface Chemistry and Catalysis, KU Leuven—University of Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Robert A. Schoonheydt
- Department of Microbial and Molecular Systems, Centre for Surface Chemistry and Catalysis, KU Leuven—University of Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Bert F. Sels
- Department of Microbial and Molecular Systems, Centre for Surface Chemistry and Catalysis, KU Leuven—University of Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Edward I. Solomon
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
- Photon Science, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, United States
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29
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Wang L, Li J, Zhang L, Fang Y, Chen C, Zhao Y, Song Y, Deng L, Tan G, Wang X, Power PP. Isolable Borane-Based Diradical and Triradical Fused by a Diamagnetic Transition Metal Ion. J Am Chem Soc 2017; 139:17723-17726. [PMID: 29185742 DOI: 10.1021/jacs.7b10141] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Complex Fe(bpyB)3 (1, bpyB = 5,5'-bis(dimesitylboranyl)-2,2'-bipyridine) and its reduced species [(18-c-6)K(THF)2]·[Fe(bpyB)3] (2) were synthesized. Their solid state and electronic structures were investigated by single crystal X-ray crystallography, electron paramagnetic resonance and UV-vis spectroscopy, and SQUID measurements. In 1 two bpyB radical anions are fused by a diamagnetic FeII ion, whereas in 2 all three bpyB ligands are in the radical state. Complex 1 possesses an open-shell singlet ground state with a singlet-triplet gap of 0.18 kcal mol-1 and 2 features an open-shell doublet ground state with a doublet-quartet gap of 1.4 kcal mol-1, as determined by SQUID measurements. The unpaired-electrons in 1 and 2 mainly delocalize over the boron atoms and the bipyrdine moieties with negligible spin density at the iron center. Complex 2 represents the first isolable example of boron-based triradicals.
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Affiliation(s)
- Lei Wang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210023, China
| | - Jing Li
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210023, China
| | - Li Zhang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210023, China
| | - Yong Fang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210023, China
| | - Chao Chen
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210023, China
| | - Yue Zhao
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210023, China
| | - You Song
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210023, China
| | - Liang Deng
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , 345 Lingling Road, Shanghai 200032, China
| | - Gengwen Tan
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210023, China
| | - Xinping Wang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210023, China
| | - Philip P Power
- Department of Chemistry, University of California, Davis , Davis, California 95616, United States
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30
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Photo-catalytic degradation of binding media of ultramarine blue containing paint layers: A new perspective on the phenomenon of “ultramarine disease” in paintings. Polym Degrad Stab 2017. [DOI: 10.1016/j.polymdegradstab.2017.08.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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31
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Li P, Liu Y, Cao J, Tao M, Zhang W. Tuning the Catalytic Activity of Tertiary-Amine Functionalized Polyacrylonitrile Fibers by Adjusting the Surface Microenvironment. ChemCatChem 2017. [DOI: 10.1002/cctc.201700515] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Pengyu Li
- Department of Chemistry; School of Science; Collaborative Innovation Center of Chemical Science and Engineering; Tianjin University; Tianjin 300072 P.R. China
| | - Yuanyuan Liu
- Department of Chemistry; School of Science; Collaborative Innovation Center of Chemical Science and Engineering; Tianjin University; Tianjin 300072 P.R. China
| | - Jian Cao
- Department of Chemistry; School of Science; Collaborative Innovation Center of Chemical Science and Engineering; Tianjin University; Tianjin 300072 P.R. China
| | - Minli Tao
- Department of Chemistry; School of Science; Collaborative Innovation Center of Chemical Science and Engineering; Tianjin University; Tianjin 300072 P.R. China
| | - Wenqin Zhang
- Department of Chemistry; School of Science; Collaborative Innovation Center of Chemical Science and Engineering; Tianjin University; Tianjin 300072 P.R. China
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32
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Valencia D. Elucidating the structure of light absorbing styrene carbocation species formed within zeolites. Phys Chem Chem Phys 2017; 19:15050-15058. [PMID: 28561105 DOI: 10.1039/c7cp02344h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Styrene derivatives can form carbocation species upon contact with zeolites. In this study, structures of a series of styrene derivatives with substituents in the para position, which have been obtained experimentally, were elucidated using theoretical calculations. Styrene with F, Cl, Br, methyl (Me) and methoxy (MeO) groups was studied by means of (TD)-DFT calculations. Electronic structure changes depending on the substituents, Br and MeO, showed smaller HOMO-LUMO gaps in the series. Theoretical excitation energies of two dimeric species were found to match very well with absorption bands reported experimentally. Ternary and secondary carbocation dimeric species were found to be responsible for the absorption of light in the visible region. Both structures were studied using aromaticity indexes as well as atoms-in-molecules theory to understand the changes in electron delocalization to produce non-typical light absorbing compounds. Aromatic rings with all the substituents lose aromaticity to reinforce charge transfer within the molecule, stabilizing the adjacent carbocation species. The results are attractive to interpret the electronic spectra of such compounds formed within zeolites and for a better understanding of the electronic structure as well as the reaction mechanisms of the carbocation species.
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Affiliation(s)
- Diego Valencia
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
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33
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Le Person A, Moissette A, Hureau M, Cornard JP, Moncomble A, Kokaislova A, Falantin C. Sorption of 3-hydroxyflavone within channel type zeolites: the effect of confinement on copper(ii) complexation. Phys Chem Chem Phys 2016; 18:26107-26116. [PMID: 27711415 DOI: 10.1039/c6cp03839e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The confinement effect on the complexation process of Cu(ii) by 3-hydroxyflavone (3HF) was investigated by studying 3HF incorporation in channel-type copper-containing ZSM-5 and mordenite (MOR) zeolites characterized by different pore diameters. Complementary electronic and vibrational spectroscopy techniques point out two distinct behaviors upon 3HF sorption and subsequent complexation depending on the channel diameter in CuZSM-5 and CuMOR. To determine the influence of the internal environment on the interaction between the copper cation and the guest molecule, and to predict the structure of the complexes formed within the narrow-pore ZSM-5 and in the larger pore mordenite, the vibrational spectra of the complexes were calculated using quantum chemical calculations at the DFT level. From the calculations, it is derived that the Cu(3HF)+ chelate is formed in CuMOR indicating a weak interaction with the pore walls. In contrast, due to high confinement in CuZSM-5, interactions between copper cations and the narrower pore walls are assumed to take place in addition to 3HF metal complexation. To emphasize the fact that zeolites act as a solid solvent, 3HF complexation was also investigated in methanol solution. In such liquid media, a stable complex Cu(3HF)2 of 1 : 2 stoichiometry resulting in a double chelation with the metal cation was found to coexist with a minor species [Cu(3HF)(MeOH)2]+ of 1 : 1 stoichiometry. These two complexes show striking analogy with those observed in CuZSM-5 and CuMOR, respectively. Thus, it appears clearly that zeolites can constitute an ideal tool to control and orientate molecular reactivity for the guest in the isolated state.
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Affiliation(s)
- A Le Person
- LASIR, UMR-CNRS 8516, Université de Lille, Sciences et Technologies, Bât. C5, Villeneuve d'Ascq cedex, France.
| | - A Moissette
- LASIR, UMR-CNRS 8516, Université de Lille, Sciences et Technologies, Bât. C5, Villeneuve d'Ascq cedex, France.
| | - M Hureau
- LASIR, UMR-CNRS 8516, Université de Lille, Sciences et Technologies, Bât. C5, Villeneuve d'Ascq cedex, France.
| | - J P Cornard
- LASIR, UMR-CNRS 8516, Université de Lille, Sciences et Technologies, Bât. C5, Villeneuve d'Ascq cedex, France.
| | - A Moncomble
- LASIR, UMR-CNRS 8516, Université de Lille, Sciences et Technologies, Bât. C5, Villeneuve d'Ascq cedex, France.
| | - A Kokaislova
- LASIR, UMR-CNRS 8516, Université de Lille, Sciences et Technologies, Bât. C5, Villeneuve d'Ascq cedex, France. and Department of Analytical Chemistry, Institute of Chemical Technology, Technická 5, 166 28 Praha 6 - Dejvice, Czech Republic
| | - C Falantin
- LASIR, UMR-CNRS 8516, Université de Lille, Sciences et Technologies, Bât. C5, Villeneuve d'Ascq cedex, France.
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D’Auria M, Pellegrino F, Viggiani L. The diastereoselectivity of the Paternò-Büchi reaction between 2,3-dihydrofuran and aromatic carbonyl compounds in organized medium. J Photochem Photobiol A Chem 2016. [DOI: 10.1016/j.jphotochem.2016.05.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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35
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Kazakova AN, Nenajdenko CG, Vasilyev AV. Oxidative dimerization of 2-chloro-3,3,3-trifluoro- 1-(4-methoxyphenyl)propene in the system PbO2–CF3SO3H. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2016. [DOI: 10.1134/s1070428016040230] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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36
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Kameda T, Azumi E, Fukushima A, Tang N, Matsuki A, Kamiya Y, Toriba A, Hayakawa K. Mineral dust aerosols promote the formation of toxic nitropolycyclic aromatic compounds. Sci Rep 2016; 6:24427. [PMID: 27075250 PMCID: PMC4830986 DOI: 10.1038/srep24427] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Accepted: 03/30/2016] [Indexed: 01/06/2023] Open
Abstract
Atmospheric nitrated polycyclic aromatic hydrocarbons (NPAHs), which have been shown to have adverse health effects such as carcinogenicity, are formed in part through nitration reactions of their parent polycyclic aromatic hydrocarbons (PAHs) in the atmosphere. However, little is known about heterogeneous nitration rates of PAHs by gaseous NO2 on natural mineral substrates, such as desert dust aerosols. Herein by employing kinetic experiments using a flow reactor and surface analysis by Fourier transform infrared spectroscopy with pyridine adsorption, we demonstrate that the reaction is accelerated on acidic surfaces of mineral dust, particularly on those of clay minerals. In support of this finding, we show that levels of ambient particle-associated NPAHs in Beijing, China, significantly increased during heavy dust storms. These results suggest that mineral dust surface reactions are an unrecognized source of toxic organic chemicals in the atmosphere and that they enhance the toxicity of mineral dust aerosols in urban environments.
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Affiliation(s)
- Takayuki Kameda
- Graduate School of Energy Science, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto 606-8501, Japan
| | - Eri Azumi
- Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
| | - Aki Fukushima
- Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
| | - Ning Tang
- Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
| | - Atsushi Matsuki
- Institute of Nature and Environmental Technology, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
| | - Yuta Kamiya
- Graduate School of Energy Science, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto 606-8501, Japan
| | - Akira Toriba
- Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
| | - Kazuichi Hayakawa
- Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
- Institute of Nature and Environmental Technology, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
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37
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Shi J, Wang Y, Yang W, Tang Y, Xie Z. Recent advances of pore system construction in zeolite-catalyzed chemical industry processes. Chem Soc Rev 2015; 44:8877-903. [PMID: 26567526 DOI: 10.1039/c5cs00626k] [Citation(s) in RCA: 155] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The kaleidoscopic applications of zeolite catalysts (zeo-catalysts) in petrochemical processes has been considered as one of the major accomplishments in recent decades. About twenty types of zeolite have been industrially applied so far, and their versatile porous architectures have contributed their most essential features to affect the catalytic efficiency. This review depicts the evolution of pore models in zeolite catalysts accompanied by the increase in industrial and environmental demands. The indispensable roles of modulating pore models are outlined for zeo-catalysts for the enhancement of their catalytic performances in various industrial processes. The zeolites and related industrial processes discussed range from the uni-modal micropore system of zeolite Y (12-ring micropore, 12-R) in fluid catalytic cracking (FCC), zeolite ZSM-5 (10-R) in xylene isomerization and SAPO-34 (8-R) in olefin production to the multi-modal micropore system of MCM-22 (10-R and 12-R pocket) in aromatic alkylation and the hierarchical pores in FCC and catalytic cracking of C4 olefins. The rational construction of pore models, especially hierarchical features, is highlighted with a careful classification from an industrial perspective accompanied by a detailed analysis of the theoretical mechanisms.
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Affiliation(s)
- Jing Shi
- SINOPEC Shanghai Research Institute of Petrochemical Technology, Shanghai 201208, China
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38
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Ramanathan D, Pitchumani K. Copper(I)-Y Zeolite-Catalyzed Regio- and Stereoselective [2 + 2 + 2] Cyclotrimerization Cascade: An Atom- and Step-Economical Synthesis of Pyrimido[1,6-a]quinoline. J Org Chem 2015; 80:10299-308. [PMID: 26390020 DOI: 10.1021/acs.joc.5b01896] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
An elegant copper(I)-Y zeolite-catalyzed tandem process, involving ketenimine-based termolecular [2 + 2 + 2]/[NC + CC + NC] cycloaddition, using sulfonyl azide, alkyne, and quinoline, to prepare pyrimido[1,6-a]quinolines is reported. In this straightforward, highly atom- and step-economical protocol, copper(I) promotes for azide-alkyne [3 + 2] cycloaddition which is followed by ring-rearrangement/ketenimine formation/regio- and stereoselective [2 + 2 + 2] termolecular cycloaddition and dehydrogenation cascade to yield selectively the E-isomer of pyrimido[1,6-a]quinoline.
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Affiliation(s)
- Devenderan Ramanathan
- School of Chemistry and ‡Centre for Green Chemistry Processes, School of Chemistry, Madurai Kamaraj University , Madurai 625 021, India
| | - Kasi Pitchumani
- School of Chemistry and ‡Centre for Green Chemistry Processes, School of Chemistry, Madurai Kamaraj University , Madurai 625 021, India
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39
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Wang C, Bai S, Xiong Y. Recent advances in surface and interface engineering for electrocatalysis. CHINESE JOURNAL OF CATALYSIS 2015. [DOI: 10.1016/s1872-2067(15)60911-1] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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40
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Ramamurthy V, Mondal B. Supramolecular photochemistry concepts highlighted with select examples. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2015. [DOI: 10.1016/j.jphotochemrev.2015.04.002] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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41
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Hara M, Nakajima K, Kamata K. Recent progress in the development of solid catalysts for biomass conversion into high value-added chemicals. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2015; 16:034903. [PMID: 27877800 PMCID: PMC5099837 DOI: 10.1088/1468-6996/16/3/034903] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Revised: 04/14/2015] [Accepted: 04/14/2015] [Indexed: 05/15/2023]
Abstract
In recent decades, the substitution of non-renewable fossil resources by renewable biomass as a sustainable feedstock has been extensively investigated for the manufacture of high value-added products such as biofuels, commodity chemicals, and new bio-based materials such as bioplastics. Numerous solid catalyst systems for the effective conversion of biomass feedstocks into value-added chemicals and fuels have been developed. Solid catalysts are classified into four main groups with respect to their structures and substrate activation properties: (a) micro- and mesoporous materials, (b) metal oxides, (c) supported metal catalysts, and (d) sulfonated polymers. This review article focuses on the activation of substrates and/or reagents on the basis of groups (a)-(d), and the corresponding reaction mechanisms. In addition, recent progress in chemocatalytic processes for the production of five industrially important products (5-hydroxymethylfurfural, lactic acid, glyceraldehyde, 1,3-dihydroxyacetone, and furan-2,5-dicarboxylic acid) as bio-based plastic monomers and their intermediates is comprehensively summarized.
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Affiliation(s)
- Michikazu Hara
- Materials and Structures Laboratory, Tokyo Institute of Technology, Nagatsuta-cho 4259, Midori-ku, Yokohama 226-8503, Japan
- Frontier Research Center, Tokyo Institute of Technology, Nagatsuta-cho 4259, Midori-ku, Yokohama 226-8503, Japan
- Japan Science and Technology Agency (JST), Advanced Low Carbon Technology Research and Development Program (ALCA), 4-1-8 Honcho, Kawaguchi 332-0012, Japan
| | - Kiyotaka Nakajima
- Materials and Structures Laboratory, Tokyo Institute of Technology, Nagatsuta-cho 4259, Midori-ku, Yokohama 226-8503, Japan
- JST, Precursory Research for Embryonic Science and Technology (PRESTO), 4-1-8 Honcho, Kawaguchi 332-0012, Japan
| | - Keigo Kamata
- Materials and Structures Laboratory, Tokyo Institute of Technology, Nagatsuta-cho 4259, Midori-ku, Yokohama 226-8503, Japan
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42
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Yun JH, Lobo RF. Effects of temperature pretreatment on propane cracking over H-SSZ-13 zeolites. Catal Sci Technol 2015. [DOI: 10.1039/c4cy00731j] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The effect of thermal treatment of SSZ-13 on catalytic activity has been investigated by using monomolecular propane conversion as a probe reaction.
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Affiliation(s)
- J. H. Yun
- Center for Catalytic Science and Technology
- Department of Chemical & Biomolecular Engineering
- University of Delaware
- Newark
- USA
| | - R. F. Lobo
- Center for Catalytic Science and Technology
- Department of Chemical & Biomolecular Engineering
- University of Delaware
- Newark
- USA
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43
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Wang JF, Wang D, Zeng H, Zhou ZF. Preparation and oxygen storage of cadmium-modified zeolites with superior electron transfer capacities. RSC Adv 2015. [DOI: 10.1039/c5ra14615a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An electron-rich cadmium-modified zeolite prepared by the incorporation of cadmium vapor into the channels of a dehydrodrated HZSM-5, shows superior oxygen storage property.
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Affiliation(s)
- Jing-Feng Wang
- School of Materials Science and Engineering
- Shanghai University
- Shanghai 200444
- People's Republic of China
| | - Dan Wang
- School of Materials Science and Engineering
- Shanghai University
- Shanghai 200444
- People's Republic of China
| | - Hui Zeng
- School of Materials Science and Engineering
- Shanghai University
- Shanghai 200444
- People's Republic of China
| | - Zhong-Fu Zhou
- School of Materials Science and Engineering
- Shanghai University
- Shanghai 200444
- People's Republic of China
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44
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Chibac AL, Buruiana T, Melinte V, Mangalagiu I, Buruiana EC. Tuning the size and the photocatalytic performance of gold nanoparticles in situ generated in photopolymerizable glycomonomers. RSC Adv 2015. [DOI: 10.1039/c5ra14695j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Polymer nanocomposites containing Au NPs in situ photogenerated during the UV-curing process were prepared starting from methacrylated glycomonomers with α-d-glucofuranose or d-mannitol structural units, other mono(di)methacrylates and AuCl3.
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Affiliation(s)
- Andreea L. Chibac
- Department of Organic Chemistry
- “Al. I. Cuza” University of Iasi
- 700506 Iasi
- Romania
- Petru Poni Institute of Macromolecular Chemistry
| | - Tinca Buruiana
- Petru Poni Institute of Macromolecular Chemistry
- 700487 Iasi
- Romania
| | - Violeta Melinte
- Petru Poni Institute of Macromolecular Chemistry
- 700487 Iasi
- Romania
| | - Ionel Mangalagiu
- Department of Organic Chemistry
- “Al. I. Cuza” University of Iasi
- 700506 Iasi
- Romania
| | - Emil C. Buruiana
- Petru Poni Institute of Macromolecular Chemistry
- 700487 Iasi
- Romania
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45
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Narayanaswamy Venkatesan P, Dharmalingam S. Effect of zeolite on SPEEK /zeolite hybrid membrane as electrolyte for microbial fuel cell applications. RSC Adv 2015. [DOI: 10.1039/c5ra14701h] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A zeolite (H-faujasite) incorporated SPEEK membrane was demonstrated as an effective proton exchange membrane for Microbial Fuel Cell (MFC) application.
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46
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Yamamoto H, Ohkubo K, Akimoto S, Fukuzumi S, Tsuda A. Control of reaction pathways in the photochemical reaction of a quinone with tetramethylethylene by metal binding. Org Biomol Chem 2014; 12:7004-17. [PMID: 24947667 DOI: 10.1039/c4ob00659c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The present study reports a novel supramolecular photochemical reaction that focuses on the direct electronic interactions between a host reaction substrate and guest metal salts. The reaction pathways in the photochemical reactions of quinone derivatives bearing a methoxy group and a long oligoether sidearm QEn (n = 0 and 3) with tetramethylethylene (TME) are changed upon noncovalent complexations of the host reactant with alkali and alkaline earth metal ions and a transition metal salt. The photochemical reaction of QEn with TME provides a mixture of [2 + 2] cycloadducts 1aEn and 1bEn, hydroquinone H2QEn, and monoallyl ether adducts of hydroquinones 2aEn and 2bEn. The photochemical reaction proceeds by the photoinduced electron transfer mechanism, where photoirradiation brings about formation of a radical ion pair [QEn˙(-), TME˙(+)] as the primary intermediate. We found that the yields and selectivity of these photoproducts are changed upon electronic interactions of QEn˙(-) with the metal salts. The photochemical reaction in the absence of metal salts provides H2QEn as its major product, whereas QE3, having the long sidearm, dominantly produces 2aE3 at the expense of 1aE3, 1bE3, and H2QE3 when it forms a size-favorable host-guest complex with divalent Ca(2+). In contrast, QEn selectively provides oxetanes 1aEn and 1bEn in the presence of Pd(OAc)2, which can form complexes with the quinone through metal-olefin and coordination interactions in the ground and photoexcited states of the quinone.
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Affiliation(s)
- Hiroaki Yamamoto
- Department of Chemistry, Graduate School of Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan.
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47
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Equbal A, Srinivasan S, Ramachandran C, Sathyamurthy N. Encapsulation of paramagnetic diatomic molecules B 2 , O 2 and Ge 2 inside C 60. Chem Phys Lett 2014. [DOI: 10.1016/j.cplett.2014.07.031] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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48
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Douhal A, Alarcos N, Cohen B. Photodynamics of a Proton-Transfer Dye in Solutions and Confined Within NaX and NaY Zeolites. J Phys Chem B 2014; 118:19431-19443. [PMID: 25060093 DOI: 10.1021/jp505591k] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report on steady-state, picosecond and femtosecond time-resolved emission studies of 2-(2'-hydroxyphenyl)benzoxazole (HBO) in solutions and interacting with NaX and NaY zeolites. In solutions, an ultrafast (less than 150 fs) excited-state intramolecular proton-transfer (ESIPT) reaction takes place in syn-enol form, and leads to keto-type tautomer. We also observed a torsional motion in the keto form (~20 ps in dichloromethane, DCM). For NaX and NaY DCM suspensions, anionic forms interacting with the zeolites at S0 and S1 states are generated. They show two fluorescence lifetimes in both zeolites (720 ps and 2.4 ns for NaY and 960 ps and 2.7 ns for NaX), while those of the enol bonded to the zeolite framework and of the free keto forms are ~100 and 250 ps, respectively. The ultrafast dynamics of the anion in alkaline solutions reveals two deactivation pathways: an intramolecular charge transfer (ICT, 1.2 ps) and a twisting motion, affected by the viscosity of the solvent (12 and 20 ps for MeOH and ethylene glycol). When HBO is interacting with NaX and NaY the twisting motion is cancelled, while the ICT becomes slower as a result of a combination of several environment effects. HBO anions within the faujasite framework show also a ~ 30 ps decay associated to a non-fluorescent (n, π*) state. Our results demonstrate how intermolecular H-bonds, the confinement and the electrostatic interactions of HBO with the used materials, affect its ground as well as its excited state properties. Our findings add new knowledge on the interactions of silica-based nanomaterials containing the H-bonding guests.
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49
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Shi XL, Xing X, Lin H, Zhang W. Synthesis of Polyacrylonitrile Fiber-Supported Poly(ammonium methanesulfonate)s as Active and Recyclable Heterogeneous Brønsted Acid Catalysts. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400048] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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50
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Li Y, Yu J. New stories of zeolite structures: their descriptions, determinations, predictions, and evaluations. Chem Rev 2014; 114:7268-316. [PMID: 24844459 DOI: 10.1021/cr500010r] [Citation(s) in RCA: 269] [Impact Index Per Article: 26.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Yi Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University , Qianjin Street 2699, Changchun 130012, China
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