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Xiao Q, Jiang Y, Yuan W, Chen J, Li H, Zheng H. Styrene epoxidation catalyzed by polyoxometalate/quaternary ammonium phase transfer catalysts: the effect of cation size and catalyst deactivation mechanism. Chin J Chem Eng 2022. [DOI: 10.1016/j.cjche.2022.04.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Sorption and Magnetic Properties of Oxalato-Based Trimetallic Open Framework Stabilized by Charge-Assisted Hydrogen Bonds. Int J Mol Sci 2022; 23:ijms23031556. [PMID: 35163480 PMCID: PMC8835875 DOI: 10.3390/ijms23031556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 01/19/2022] [Accepted: 01/27/2022] [Indexed: 11/26/2022] Open
Abstract
We report a new structure of {[Co(bpy)2(ox)][{Cu2(bpy)2(ox)}Fe(ox)3]}n·8.5nH2O NCU-1 presenting a rare ladder topology among oxalate-based coordination polymers with anionic chains composed of alternately arranged [Cu2(bpy)2(ox)]2+ and [Fe(ox)3]3− moieties. Along the a axis, they are separated by Co(III) units to give porous material with voids of 963.7 Å3 (16.9% of cell volume). The stability of this structure is assured by a network of stacking interactions and charge-assisted C-H…O hydrogen bonds formed between adjacent chains, adjacent cobalt(III) units, and alternately arranged cobalt(III) and chain motifs. The soaking experiment with acetonitrile and bromobenzene showed that water molecules (8.5 water molecules dispersed over 15 positions) are bonded tightly, despite partial occupancy. Water adsorption experiments are described by a D’arcy and Watt model being the sum of Langmuir and Dubinin–Serpinski isotherms. The amount of primary adsorption sites calculated from this model is equal 8.2 mol H2O/mol, being very close to the value obtained from the XRD experiments and indicates that water was adsorbed mainly on the primary sites. The antiferromagnetic properties could be only approximately described with the simple CuII-ox-CuII dimer using H = −J·S1·S2, thus, considering non-trivial topology of the whole Cu-Fe chain, we developed our own general approach, based on the semiclassical model (SC) and molecular field (MF) model, to describe precisely the magnetic superexchange interactions in NCU-1. We established that Cu(II)-Cu(II) coupling dominates over multiple Cu(II)-Fe(III) interactions, with JCuCu = −275(29) and JCuFe = −3.8(1.6) cm−1 and discussed the obtained values against the literature data.
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Li L, Zhang Y, Wang X, Xu N, Li XH, Wang XL. Various amide derivatives induced Keggin-type SiW12O404−-based cobalt complexes: assembly, structure, electrochemical sensing and dye adsorption properties. CrystEngComm 2022. [DOI: 10.1039/d1ce01619a] [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
Three new [SiW12O40]4−-based complexes assembled from three amide derivative ligands displayed excellent electrochemical sensing activities for BrO3−, NO2− and Cr(vi) ions and showed good adsorption capacities for methylene blue and neutral red dyes.
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Affiliation(s)
- Lei Li
- College of Chemistry and Materials Engineering, Bohai University, Jinzhou, 121013, P. R. China
| | - Yue Zhang
- College of Chemistry and Materials Engineering, Bohai University, Jinzhou, 121013, P. R. China
| | - Xiang Wang
- College of Chemistry and Materials Engineering, Bohai University, Jinzhou, 121013, P. R. China
| | - Na Xu
- College of Chemistry and Materials Engineering, Bohai University, Jinzhou, 121013, P. R. China
| | - Xiao-Hui Li
- College of Chemistry and Materials Engineering, Bohai University, Jinzhou, 121013, P. R. China
| | - Xiu-Li Wang
- College of Chemistry and Materials Engineering, Bohai University, Jinzhou, 121013, P. R. China
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Zhang TT, Zhao ZQ, Tian G, Cui XB. Two new polyoxoniobosilicate-based compounds: Syntheses, structures, characterizations and their catalytic properties for epoxidation and water oxidation. J SOLID STATE CHEM 2021. [DOI: 10.1016/j.jssc.2021.122029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Wang X, Li Y, Zhang T, Ma S, Wang X. Assembly, structures and properties of polyoxometalate-based supramolecular complexes involving in situ transformation of single-branch N-donor cyano ligands. CrystEngComm 2021. [DOI: 10.1039/d1ce00298h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
A series of polyoxometalate-based supramolecular complexes were prepared with in situ transformation of single-branch N-donor cyano ligands, exhibiting diverse structures and good electrocatalytic and photocatalytic properties.
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Affiliation(s)
- Xiang Wang
- Liaoning Professional Technology Innovation Center of Liaoning Province for Conversion Materials of Solar Cell
- College of Chemistry and Materials Engineering
- Bohai University
- Jinzhou 121000
- P. R. China
| | - Yunhui Li
- Liaoning Professional Technology Innovation Center of Liaoning Province for Conversion Materials of Solar Cell
- College of Chemistry and Materials Engineering
- Bohai University
- Jinzhou 121000
- P. R. China
| | - Tong Zhang
- Liaoning Professional Technology Innovation Center of Liaoning Province for Conversion Materials of Solar Cell
- College of Chemistry and Materials Engineering
- Bohai University
- Jinzhou 121000
- P. R. China
| | - Sijia Ma
- Liaoning Professional Technology Innovation Center of Liaoning Province for Conversion Materials of Solar Cell
- College of Chemistry and Materials Engineering
- Bohai University
- Jinzhou 121000
- P. R. China
| | - Xiuli Wang
- Liaoning Professional Technology Innovation Center of Liaoning Province for Conversion Materials of Solar Cell
- College of Chemistry and Materials Engineering
- Bohai University
- Jinzhou 121000
- P. R. China
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Chang W, Qi B, Song YF. Step-by-Step Assembly of 2D Confined Chiral Space Endowing Achiral Clusters with Asymmetric Catalytic Activity for Epoxidation of Allylic Alcohols. ACS APPLIED MATERIALS & INTERFACES 2020; 12:36389-36397. [PMID: 32666786 DOI: 10.1021/acsami.0c10207] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Endowing achiral polyoxometalates (POMs) with asymmetric catalytic properties is always an intriguing but challenging topic because of their high catalytic activities yet highly symmetrical molecular structures. In this work, a novel strategy was proposed to fabricate a series of two-dimensional chiral POM catalysts. Following the steps of exfoliation, covalent modification, and reassembly, the achiral POMs were orderly confined into the chiral interstitial domains of chiral ionic liquid (CIL)-modified layered double hydroxide materials with a decreased molecular symmetry. The chirality of POM molecules was induced by the l- or d-pyrrolidine-type CILs, and their asymmetric catalytic activity was enhanced by the confinement effect. Compared with the reported chiral POM-based catalysts [e.g., 8 turnover frequency (TOF) and 79% enantiomeric excess (ee) for chiral POM-based metal-organic frameworks], the constructed chiral POM catalysts showed a significantly higher TOF and enantioselectivity (up to 240 TOF and 93% ee) for the asymmetric epoxidation of allylic alcohols. The facilitated mass transfer in the IL channels and the increased binding efficiency between the chiral catalytic sites and reactants render this strategy highly promising for constructing efficient chiral catalysts from the catalytically active while achiral building blocks.
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Affiliation(s)
- Wen Chang
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Bo Qi
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Yu-Fei Song
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China
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Zhang TT, Hu YY, Zhang X, Cui XB. New compounds of polyoxometalates and cadmium mixed-organic-ligand complexes. J SOLID STATE CHEM 2020. [DOI: 10.1016/j.jssc.2019.121168] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Chi J, Fan M, Su Z, Li X, Sun J, Zhou C, Hu X. Octamolybdate-based hybrid constructed by flexible bis-triazole ligands: synthesis, photocatalytic and electrochemical properties. NEW J CHEM 2020. [DOI: 10.1039/d0nj00169d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel polyoxometalate-based organic–inorganic hybrid compound was synthesized via a facile in situ hydrothermal reaction. 1 exhibits selective photocatalytic degradation of dyes and the great property to electrocatalytically reduce H2O2 and NaNO2.
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Affiliation(s)
- Jiaqi Chi
- School of Chemistry and Environmental Engineering
- Changchun University of Science and Technology
- Changchun
- China
- Jilin Provincial Science and Technology Innovation Center of Optical Materials and Chemistry
| | - Mingyue Fan
- School of Chemistry and Environmental Engineering
- Changchun University of Science and Technology
- Changchun
- China
- Jilin Provincial Science and Technology Innovation Center of Optical Materials and Chemistry
| | - Zhongmin Su
- School of Chemistry and Environmental Engineering
- Changchun University of Science and Technology
- Changchun
- China
- Jilin Provincial Science and Technology Innovation Center of Optical Materials and Chemistry
| | - Xiao Li
- School of Chemistry and Environmental Engineering
- Changchun University of Science and Technology
- Changchun
- China
- Jilin Provincial Science and Technology Innovation Center of Optical Materials and Chemistry
| | - Jing Sun
- School of Chemistry and Environmental Engineering
- Changchun University of Science and Technology
- Changchun
- China
- Jilin Provincial Science and Technology Innovation Center of Optical Materials and Chemistry
| | - Chen Zhou
- School of Chemistry and Environmental Engineering
- Changchun University of Science and Technology
- Changchun
- China
- Jilin Provincial Science and Technology Innovation Center of Optical Materials and Chemistry
| | - Xiaoli Hu
- School of Chemistry and Environmental Engineering
- Changchun University of Science and Technology
- Changchun
- China
- Jilin Provincial Science and Technology Innovation Center of Optical Materials and Chemistry
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Abstract
Epoxides are important industrial intermediates applied in a variety of industrial processes. During the production of epoxides, catalysts have played an irreplaceable and unique role. In this review, the historic progress of molybdenum-based catalysts in alkene epoxidation are covered and an outlook on future challenge discussed. Efficient catalysts are demonstrated including soluble molybdenum complexes, polyoxometalates catalysts, molybdenum-containing metal organic frameworks, silica supported molybdenum-based catalysts, polymer supported molybdenum-based catalysts, magnetic molybdenum-based catalysts, hierarchical molybdenum-based catalysts, graphene-based molybdenum containing catalysts, photocatalyzed epoxidation catalysts, and some other systems. The effects of different solvents and oxidants are discussed and the mechanisms of epoxidation are summarized. The challenges and perspectives to further enhance the catalytic performances in alkenes epoxidation are presented.
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Tian AX, Fu YB, Cui HT, Ying J, Yang ML, Yang Y, Wang XL. A series of metal–organic loops templated by [SiMo12O40]4− and [β-Mo8O26]4− anions using double chelating ligands: amperometric sensing and selective photocatalytic properties. NEW J CHEM 2019. [DOI: 10.1039/c9nj02224d] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
By changing the POM anions and TM ions, a series of compounds with multi-nuclear loops was formed.
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Affiliation(s)
- Ai-xiang Tian
- Department of Chemistry
- Bohai University
- Jinzhou
- P. R. China
| | - Yu-bo Fu
- Department of Chemistry
- Bohai University
- Jinzhou
- P. R. China
| | - Hong-tao Cui
- Department of Chemistry
- Bohai University
- Jinzhou
- P. R. China
| | - Jun Ying
- Department of Chemistry
- Bohai University
- Jinzhou
- P. R. China
| | - Meng-le Yang
- Department of Chemistry
- Bohai University
- Jinzhou
- P. R. China
| | - Yan Yang
- Department of Chemistry
- Bohai University
- Jinzhou
- P. R. China
| | - Xiu-li Wang
- Department of Chemistry
- Bohai University
- Jinzhou
- P. R. China
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Li FC, Tan LK, Li XL, Kong HJ, Ge LM, Yue LY, Han LF. Syntheses, structures and catalytic properties of Evans–Showell-type polyoxometalate-based 3D metal–organic complexes constructed from the semi-rigid bis(pyridylformyl)piperazine ligand and transition metals. Dalton Trans 2019; 48:5831-5841. [DOI: 10.1039/c9dt00499h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two 3D Evans–Showell-type POM-based different transition metals–bis-pyrazine–bis-amide complexes act as heterogeneous catalysts for the oxidation of benzyl alcohol.
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Affiliation(s)
- Feng-Cai Li
- Henan Provincial Key Laboratory of Surface and Interface Science
- Zhengzhou University of Light Industry
- Zhengzhou 450002
- PR China
| | - Li-Kun Tan
- Henan Provincial Key Laboratory of Surface and Interface Science
- Zhengzhou University of Light Industry
- Zhengzhou 450002
- PR China
| | - Xi-Li Li
- Henan Provincial Key Laboratory of Surface and Interface Science
- Zhengzhou University of Light Industry
- Zhengzhou 450002
- PR China
| | - Hua-Jie Kong
- Henan Provincial Key Laboratory of Surface and Interface Science
- Zhengzhou University of Light Industry
- Zhengzhou 450002
- PR China
| | - Li-Ming Ge
- Henan Provincial Key Laboratory of Surface and Interface Science
- Zhengzhou University of Light Industry
- Zhengzhou 450002
- PR China
| | - Ling-Yu Yue
- Henan Provincial Key Laboratory of Surface and Interface Science
- Zhengzhou University of Light Industry
- Zhengzhou 450002
- PR China
| | - Li-Feng Han
- Henan Provincial Key Laboratory of Surface and Interface Science
- Zhengzhou University of Light Industry
- Zhengzhou 450002
- PR China
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