1
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Ren J, Proust A, Launay F, Villanneau R. Halide-free CO 2 cycloaddition onto styrene oxide catalysed by first row transition-metal derivatives of polyoxotungstates. Chem Commun (Camb) 2024; 60:4549-4552. [PMID: 38577743 DOI: 10.1039/d4cc00522h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/06/2024]
Abstract
Quaternary ammonium salts of metal derivatives of polyoxometalates [XW11O39M(H2O)]n- (X = P, Si; M = Cr, Mn, Co, Ni, Zn) were successfully tested instead of quaternary ammonium halides as catalysts in the cycloaddition of CO2 to styrene oxide. Remarkably, they gave very satisfactory yields of styrene carbonate at moderate temperature (80 °C).
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Affiliation(s)
- Jingjing Ren
- Institut Parisien de Chimie Moléculaire, CNRS UMR 8232, Sorbonne Université, Campus Pierre et Marie Curie, 4 Place Jussieu, Paris F-75005, France.
| | - Anna Proust
- Institut Parisien de Chimie Moléculaire, CNRS UMR 8232, Sorbonne Université, Campus Pierre et Marie Curie, 4 Place Jussieu, Paris F-75005, France.
| | - Franck Launay
- Laboratoire de Réactivité de Surface, UMR CNRS 7197, Sorbonne Université, Campus Pierre et Marie Curie, 4 Place Jussieu, Paris F-75005, France
| | - Richard Villanneau
- Institut Parisien de Chimie Moléculaire, CNRS UMR 8232, Sorbonne Université, Campus Pierre et Marie Curie, 4 Place Jussieu, Paris F-75005, France.
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2
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Yin HQ, Cui MY, Wang H, Peng YZ, Chen J, Lu TB, Zhang ZM. CO 2 Cycloaddition under Ambient Conditions over Cu-Fe Bimetallic Metal-Organic Frameworks. Inorg Chem 2023; 62:13722-13730. [PMID: 37540079 DOI: 10.1021/acs.inorgchem.3c01011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/05/2023]
Abstract
Carbon dioxide cycloaddition into fine chemicals is prospective technology to solve energy crisis and environmental issues. However, high temperature and pressure are usually required in the conventional cycloaddition reactions of CO2 with epoxides. Moreover, metal active sites play a vital role in the CO2 cycloaddition, but it is still unclear. Herein, we select the isostructural MOF-919-Cu-Fe and MOF-919-Cu-Al as models to promote the performance and clarify the effects of metal type on the CO2 cycloaddition. The MOF-919-Cu-Fe with exposed Fe and Cu Lewis acid sites reaches the CO2 cycloaddition with over 99.9% conversion and over 99.9% selectivity at room temperature and a 1 bar CO2 atmosphere, 3.0- and 52.6-fold higher than those of the MOF-919-Cu-Al with Al and Cu sites (33.8%) and the 1H-pyrazole-4-carboxylic acid, Fe, and Cu mixed system (1.9%), respectively. The proposed mechanism demonstrated that the exposed Fe3+ sites facilitate the ring opening of epoxide and CO2 activation to boost the CO2 cycloaddition reaction. This work provides a new insight to tune the catalytic sites of MOFs to achieve high performance for CO2 fixation.
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Affiliation(s)
- Hua-Qing Yin
- Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science & Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Ming-Yang Cui
- Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science & Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Hao Wang
- Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science & Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Yuan-Zhao Peng
- Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science & Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Jia Chen
- Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science & Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Tong-Bu Lu
- Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science & Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Zhi-Ming Zhang
- Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science & Engineering, Tianjin University of Technology, Tianjin 300384, China
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3
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Tumurbaatar O, Popova M, Mitova V, Shestakova P, Koseva N. Engineering of Silica Mesoporous Materials for CO 2 Adsorption. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16114179. [PMID: 37297313 DOI: 10.3390/ma16114179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2023] [Revised: 05/27/2023] [Accepted: 06/01/2023] [Indexed: 06/12/2023]
Abstract
Adsorption methods for CO2 capture are characterized by high selectivity and low energy consumption. Therefore, the engineering of solid supports for efficient CO2 adsorption attracts research attention. Modification of mesoporous silica materials with tailor-made organic molecules can greatly improve silica's performance in CO2 capture and separation. In that context, a new derivative of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, possessing an electron-rich condensed aromatic structure and also known for its anti-oxidative properties, was synthesized and applied as a modifying agent of 2D SBA-15, 3D SBA-16, and KIT-6 silicates. The physicochemical properties of the initial and modified materials were studied using nitrogen physisorption and temperature-gravimetric analysis. The adsorption capacity of CO2 was measured in a dynamic CO2 adsorption regime. The three modified materials displayed a higher capacity for CO2 adsorption than the initial ones. Among the studied sorbents, the modified mesoporous SBA-15 silica showed the highest adsorption capacity for CO2 (3.9 mmol/g). In the presence of 1 vol.% water vapor, the adsorption capacities of the modified materials were enhanced. Total CO2 desorption from the modified materials was achieved at 80 °C. The obtained silica materials displayed stable performance in five CO2 adsorption/desorption cycles. The experimental data can be appropriately described by the Yoon-Nelson kinetic model.
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Affiliation(s)
- Oyundari Tumurbaatar
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Bl. 9, 1113 Sofia, Bulgaria
| | - Margarita Popova
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Bl. 9, 1113 Sofia, Bulgaria
| | - Violeta Mitova
- Institute of Polymers, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Bl. 103A, 1113 Sofia, Bulgaria
| | - Pavletta Shestakova
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Bl. 9, 1113 Sofia, Bulgaria
| | - Neli Koseva
- Bulgarian Academy of Sciences, №1, 15 Noemvri St., 1040 Sofia, Bulgaria
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4
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Gorji ZE, Khodadadi AA, Riahi S, Repo T, Mortazavi Y, Kemell M. Functionalization of nitrogen-doped graphene quantum dot: A sustainable carbon-based catalyst for the production of cyclic carbonate from epoxide and CO 2. J Environ Sci (China) 2023; 126:408-422. [PMID: 36503768 DOI: 10.1016/j.jes.2022.04.046] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 04/17/2022] [Accepted: 04/26/2022] [Indexed: 06/17/2023]
Abstract
A series of organic compounds were successfully immobilized on an N-doped graphene quantum dot (N-GQD) to prepare a multifunctional organocatalyst for coupling reaction between CO2 and propylene oxide (PO). The simultaneous presence of halide ions in conjunction with acidic- and basic-functional groups on the surface of the nanoparticles makes them highly active for the production of propylene carbonate (PC). The effects of variables such as catalyst loading, reaction temperature, and structure of substituents are discussed. The proposed catalysts were characterized by different techniques, including Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy/energy dispersive X-ray microanalysis (FESEM/EDX), thermogravimetric analysis (TGA), elemental analysis, atomic force microscopy (AFM), and ultraviolet-visible (UV-Vis) spectroscopy. Under optimal reaction conditions, 3-bromopropionic acid (BPA) immobilized on N-GQD showed a remarkable activity, affording the highest yield of 98% at 140°C and 106 Pa without any co-catalyst or solvent. These new metal-free catalysts have the advantage of easy separation and reuse several times. Based on the experimental data, a plausible reaction mechanism is suggested, where the hydrogen bonding donors and halogen ion can activate the epoxide, and amine functional groups play a vital role in CO2 adsorption.
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Affiliation(s)
- Zahra Eshaghi Gorji
- Catalysis and Nanostructured Materials Research Laboratory, School of Chemical Engineering, College of Engineering, University of Tehran, Tehran 1417614411, Iran; Department of Chemistry, University of Helsinki, Helsinki 00014, Finland
| | - Abbas Ali Khodadadi
- Catalysis and Nanostructured Materials Research Laboratory, School of Chemical Engineering, College of Engineering, University of Tehran, Tehran 1417614411, Iran
| | - Siavash Riahi
- Institute of Petroleum Engineering, School of Chemical Engineering, College of Engineering, University of Tehran, Tehran 1439953754, Iran
| | - Timo Repo
- Department of Chemistry, University of Helsinki, Helsinki 00014, Finland.
| | - Yadollah Mortazavi
- Catalysis and Nanostructured Materials Research Laboratory, School of Chemical Engineering, College of Engineering, University of Tehran, Tehran 1417614411, Iran.
| | - Marianna Kemell
- Department of Chemistry, University of Helsinki, Helsinki 00014, Finland
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5
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Wei F, Qiu J, Zeng Y, Liu Z, Wang X, Xie G. A Novel POP-Ni Catalyst Derived from PBTP for Ambient Fixation of CO 2 into Cyclic Carbonates. MATERIALS (BASEL, SWITZERLAND) 2023; 16:2132. [PMID: 36984012 PMCID: PMC10057775 DOI: 10.3390/ma16062132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Revised: 03/02/2023] [Accepted: 03/04/2023] [Indexed: 06/18/2023]
Abstract
The immobilization of homogeneous catalysts has always been a hot issue in the field of catalysis. In this paper, in an attempt to immobilize the homogeneous [Ni(Me6Tren)X]X (X = I, Br, Cl)-type catalyst with porous organic polymer (POP), the heterogeneous catalyst PBTP-Me6Tren(Ni) (POP-Ni) was designed and constructed by quaternization of the porous bromomethyl benzene polymer (PBTP) with tri[2-(dimethylamino)ethyl]amine (Me6Tren) followed by coordination of the Ni(II) Lewis acidic center. Evaluation of the performance of the POP-Ni catalyst found it was able to catalyze the CO2 cycloaddition with epichlorohydrin in N,N-dimethylformamide (DMF), affording 97.5% yield with 99% selectivity of chloropropylene carbonate under ambient conditions (80 °C, CO2 balloon). The excellent catalytic performance of POP-Ni could be attributed to its porous properties, the intramolecular synergy between Lewis acid Ni(II) and nucleophilic Br anion, and the efficient adsorption of CO2 by the multiamines Me6Tren. In addition, POP-Ni can be conveniently recovered through simple centrifugation, and up to 91.8% yield can be obtained on the sixth run. This research provided a facile approach to multifunctional POP-supported Ni(II) catalysts and may find promising application for sustainable and green synthesis of cyclic carbonates.
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Affiliation(s)
- Fen Wei
- Guangdong Provincial Engineering Technology Research Center of Key Material for High Performance Copper Clad Laminate, School of Materials Science and Engineering, Dongguan University of Technology, Dongguan 523808, China
- School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan 523808, China
| | - Jiaxiang Qiu
- School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan 523808, China
| | - Yanbin Zeng
- School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan 523808, China
| | - Zhimeng Liu
- Guangdong Provincial Engineering Technology Research Center of Key Material for High Performance Copper Clad Laminate, School of Materials Science and Engineering, Dongguan University of Technology, Dongguan 523808, China
| | - Xiaoxia Wang
- Guangdong Provincial Engineering Technology Research Center of Key Material for High Performance Copper Clad Laminate, School of Materials Science and Engineering, Dongguan University of Technology, Dongguan 523808, China
| | - Guanqun Xie
- School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan 523808, China
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Mella C, Pecchi G, Godard C, Claver C, Márquez A, Campos CH. Immobilized Pd metal‐complex on polymeric resin with high surface areas for recyclable catalyst: Effect of the immobilization method on nature of palladium species. J Appl Polym Sci 2023. [DOI: 10.1002/app.53608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Claudio Mella
- Departamento de Polímeros, Facultad de Ciencias Químicas Universidad de Concepción Concepción Chile
| | - Gina Pecchi
- Departamento de Polímeros, Facultad de Ciencias Químicas Universidad de Concepción Concepción Chile
- Millenium Nuclei on Catalytic Processes towards Sustainable Chemistry (CSC) Santiago Chile
| | - Cyril Godard
- Department de Química Física i Inorgánica Universitat Rovira i Virgili Tarragona Spain
| | - Carmen Claver
- Department de Química Física i Inorgánica Universitat Rovira i Virgili Tarragona Spain
| | - Abdiel Márquez
- Centro de Nanociencias y Nanotecnología Universidad Nacional Autónoma de México Ensenada Baja California Mexico
| | - Cristian H. Campos
- Departamento de Polímeros, Facultad de Ciencias Químicas Universidad de Concepción Concepción Chile
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Balas M, Mayoufi A, Villanneau R, Launay F. Revisiting the Mukaiyama-type epoxidation for the conversion of styrene into styrene carbonate in the presence of O 2 and CO 2. REACT CHEM ENG 2023. [DOI: 10.1039/d2re00330a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Abstract
Alkene epoxidation using the Mukaiyama process involving O2 and a sacrificial aldehyde, as the first step of the global alkene oxidative carboxylation, does not necessarily require a metal catalyst.
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Affiliation(s)
- Matthieu Balas
- Sorbonne Université, CNRS, Campus Pierre et Marie Curie, Laboratoire de Réactivité de Surface, CNRS UMR 7197, 4 Place Jussieu, F-75005 Paris, France
- Sorbonne Université, CNRS, Campus Pierre et Marie Curie, Institut Parisien de Chimie Moléculaire, CNRS UMR 8232, 4 Place Jussieu, F-75005 Paris, France
| | - Asma Mayoufi
- Sorbonne Université, CNRS, Campus Pierre et Marie Curie, Laboratoire de Réactivité de Surface, CNRS UMR 7197, 4 Place Jussieu, F-75005 Paris, France
| | - Richard Villanneau
- Sorbonne Université, CNRS, Campus Pierre et Marie Curie, Institut Parisien de Chimie Moléculaire, CNRS UMR 8232, 4 Place Jussieu, F-75005 Paris, France
| | - Franck Launay
- Sorbonne Université, CNRS, Campus Pierre et Marie Curie, Laboratoire de Réactivité de Surface, CNRS UMR 7197, 4 Place Jussieu, F-75005 Paris, France
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8
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Pandey M, Tsunoji N, Kubota Y, Bandyopadhyay M. Amine and Sulfonic Acid Anchored Porous Silica as Recyclable Heterogeneous Catalysts for Ring‐Opening of Oxiranes. ChemistrySelect 2022. [DOI: 10.1002/slct.202201756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Madhu Pandey
- Dpartment of Basic Sciences Institute of Infrastructure, Technology Research and Management, Maninagar Ahmedabad 380026 Gujarat India
| | - Nao Tsunoji
- Graduate School of Advanced Science and Engineering Hiroshima University Higashi-Hiroshima 739-852 Japan
| | - Yoshihiro Kubota
- Department of Material Science & Chemical Engineering Yokohama National University Yokohama Japan
| | - Mahuya Bandyopadhyay
- Dpartment of Basic Sciences Institute of Infrastructure, Technology Research and Management, Maninagar Ahmedabad 380026 Gujarat India
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Ma FX, Mi FQ, Sun MJ, Huang T, Wang ZA, Zhang T, Cao R. A highly stable Zn 9-pyrazolate metal–organic framework with metallosalen ligands as a carbon dioxide cycloaddition catalyst. Inorg Chem Front 2022. [DOI: 10.1039/d1qi01555a] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A three-dimensional (3D) metal–organic framework constructed from unprecedented Zn9O2(OH)2(pyz)12 (pyz = pyrazolate) clusters and Ni(salen)-derived linkers was reported.
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Affiliation(s)
- Fa-Xue Ma
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
| | - Fu-Qi Mi
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
| | - Meng-Jiao Sun
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
- University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Tao Huang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
| | - Zi-An Wang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
| | - Teng Zhang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
- University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Rong Cao
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
- University of the Chinese Academy of Sciences, Beijing 100049, China
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Balas M, K/Bidi L, Launay F, Villanneau R. Chromium-Salophen as a Soluble or Silica-Supported Co-Catalyst for the Fixation of CO 2 Onto Styrene Oxide at Low Temperatures. Front Chem 2021; 9:765108. [PMID: 34778214 PMCID: PMC8588859 DOI: 10.3389/fchem.2021.765108] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 09/30/2021] [Indexed: 12/04/2022] Open
Abstract
Addition of a soluble or a supported CrIII-salophen complex as a co-catalyst greatly enhances the catalytic activity of Bu4NBr for the formation of styrene carbonate from styrene epoxide and CO2. Their combination with a very low co-catalyst:Bu4NBr:styrene oxide molar ratio = 1:2:112 (corresponding to 0.9 mol% of CrIII co-catalyst) led to an almost complete conversion of styrene oxide after 7 h at 80°C under an initial pressure of CO2 of 11 bar and to a selectivity in styrene carbonate of 100%. The covalent heterogenization of the complex was achieved through the formation of an amide bond with a functionalized {NH2}-SBA-15 silica support. In both conditions, the use of these CrIII catalysts allowed excellent conversion of styrene already at 50°C (69 and 47% after 24 h, respectively, in homogeneous and heterogeneous conditions). Comparison with our previous work using other metal cations from the transition metals particularly highlights the preponderant effect of the nature of the metal cation as a co-catalyst in this reaction, that may be linked to its calculated binding energy to the epoxides. Both co-catalysts were successfully reused four times without any appreciable loss of performance.
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Affiliation(s)
- Matthieu Balas
- CNRS UMR 7197, Laboratoire de Réactivité de Surface, LRS, Campus Pierre et Marie Curie, Sorbonne Université, Paris, France
- CNRS UMR 8232, Institut Parisien de Chimie Moléculaire, IPCM, Campus Pierre et Marie Curie, Sorbonne Université, Paris, France
| | - Ludivine K/Bidi
- CNRS UMR 7197, Laboratoire de Réactivité de Surface, LRS, Campus Pierre et Marie Curie, Sorbonne Université, Paris, France
- CNRS UMR 8232, Institut Parisien de Chimie Moléculaire, IPCM, Campus Pierre et Marie Curie, Sorbonne Université, Paris, France
| | - Franck Launay
- CNRS UMR 7197, Laboratoire de Réactivité de Surface, LRS, Campus Pierre et Marie Curie, Sorbonne Université, Paris, France
| | - Richard Villanneau
- CNRS UMR 8232, Institut Parisien de Chimie Moléculaire, IPCM, Campus Pierre et Marie Curie, Sorbonne Université, Paris, France
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Novoa N, Manzur C, Roisnel T, Kahlal S, Saillard JY, Carrillo D, Hamon JR. Nickel(II)-Based Building Blocks with Schiff Base Derivatives: Experimental Insights and DFT Calculations. Molecules 2021; 26:molecules26175316. [PMID: 34500754 PMCID: PMC8434171 DOI: 10.3390/molecules26175316] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 08/24/2021] [Accepted: 08/26/2021] [Indexed: 11/16/2022] Open
Abstract
We have recently reported a series of neutral square planar tridentate Schiff base (L) complexes of the general formula [(L)M(py)], showing relatively high first-order hyperpolarizabilities and NLO redox switching behavior. In the present study, new members of this family of compounds have been prepared with the objective to investigate their potential as building blocks in the on-demand construction of D-π-A push–pull systems. Namely, ternary nickel(II) building blocks of general formula [(LA/D)Ni(4-pyX)] (4–7), where LA/D stands for an electron accepting or donating dianionic O,N,O-tridentate Schiff base ligand resulting from the monocondensation of 2-aminophenol or its 4-substituted nitro derivative and β-diketones R-C(=O)CH2C(=O)CH3 (R = methyl, anisyl, ferrocenyl), and 4-pyX is 4-iodopyridine or 4-ethynylpyridine, were synthesized and isolated in 60–78% yields. Unexpectedly, the Sonogashira cross-coupling reaction between the 4-iodopyridine derivative 6 and 4-ethynylpyridine led to the formation of the bis(4-pyridyl) acetylene bridged centrosymmetric dimer [{(LD)Ni}2(µ2-py-C≡C-py)] (8). Complexes 4–8 were characterized by elemental analysis, FT-IR and NMR spectroscopy, single crystal X-ray diffraction and computational methods. In each compound, the four-coordinate Ni(II) metal ion adopts a square planar geometry with two nitrogen and two oxygen atoms as donors occupying trans positions. In 8, the Ni…Ni separation is of 13.62(14) Å. Experimental results were proved and explained theoretically exploiting Density Functional Theory calculations.
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Affiliation(s)
- Néstor Novoa
- Laboratorio de Química Inorgánica y Organometálica, Departamento de Química Analítica e Inorgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Edmundo Larenas 129, Casilla 160-C, Concepción, Chile
- Laboratorio de Química Inorgánica, Instituto de Química, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso, Avenida Universidad 330, Curauma 2371985, Valparaíso, Chile;
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)–UMR 6226, F-35000 Rennes, France; (T.R.); (S.K.); (J.-Y.S.)
- Correspondence: (N.N.); (D.C.); (J.-R.H.)
| | - Carolina Manzur
- Laboratorio de Química Inorgánica, Instituto de Química, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso, Avenida Universidad 330, Curauma 2371985, Valparaíso, Chile;
| | - Thierry Roisnel
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)–UMR 6226, F-35000 Rennes, France; (T.R.); (S.K.); (J.-Y.S.)
| | - Samia Kahlal
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)–UMR 6226, F-35000 Rennes, France; (T.R.); (S.K.); (J.-Y.S.)
| | - Jean-Yves Saillard
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)–UMR 6226, F-35000 Rennes, France; (T.R.); (S.K.); (J.-Y.S.)
| | - David Carrillo
- Laboratorio de Química Inorgánica, Instituto de Química, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso, Avenida Universidad 330, Curauma 2371985, Valparaíso, Chile;
- Correspondence: (N.N.); (D.C.); (J.-R.H.)
| | - Jean-René Hamon
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)–UMR 6226, F-35000 Rennes, France; (T.R.); (S.K.); (J.-Y.S.)
- Correspondence: (N.N.); (D.C.); (J.-R.H.)
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