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Xu Q, Liang X, Xu B, Wang J, He P, Ma P, Feng J, Wang J, Niu J. 36-Nuclearity Organophosphonate-Functionalized Polyoxomolybdates: Synthesis, Characterization and Selective Catalytic Oxidation of Sulfides. Chemistry 2020; 26:14896-14902. [PMID: 32543759 DOI: 10.1002/chem.202001468] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Indexed: 01/02/2023]
Abstract
The crown-shaped 36-molybdate cluster organophosphonate-functionalized polyoxomolybdates with the highest nuclearity in organophosphonate-based polyoxometalate chemistry, (NH4 )19 Na7 H10 [Cu(H2 O)TeMo6 O21 {N(CH2 PO3 )3 }]6 ⋅31 H2 O, has been reported for the first time. The synthesized 36-molybdate cluster was characterized by routine techniques and tested as a heterogeneous catalyst for selective oxidation of sulfides with impressive catalytic and selective performances after heat treatment. High efficiency (TON=15333) was achieved in the selective oxidation of sulfides to sulfoxides, caused by the synergic effect between copper and polyoxomolybdates and the generation of the cuprous species during the heat treatment.
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Affiliation(s)
- Qiaofei Xu
- Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan, 475004, P. R. China
| | - Xinmiao Liang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan, 430071, P. R. China
| | - Baijie Xu
- Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan, 475004, P. R. China
| | - Jiawei Wang
- Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan, 475004, P. R. China
| | - Peipei He
- Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan, 475004, P. R. China
| | - Pengtao Ma
- Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan, 475004, P. R. China
| | - Jiwen Feng
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan, 430071, P. R. China
| | - Jingping Wang
- Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan, 475004, P. R. China
| | - Jingyang Niu
- Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan, 475004, P. R. China
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Healy C, Steuber FW, Wix P, Macreadie LK, Kathalikkattil AC, Schmitt W. Assembly, disassembly and reassembly: a "top-down" synthetic strategy towards hybrid, mixed-metal {Mo 10Co 6} POM clusters. Dalton Trans 2019; 48:3018-3027. [PMID: 30747935 DOI: 10.1039/c9dt00075e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Polyoxometalates (POMs) are commonly prepared using a "bottom-up" synthetic procedure. The alternative "top-down" approach of disassembling a pre-formed POM unit to generate new synthetic intermediates is promising, but relatively comparatively underused. In this paper, a rationale for the top-down method is provided, demonstrating that this approach can generate compounds that are fundamentally inaccessible from simple bottom-up assembly. We demonstrate this principle through the synthesis of a series of 10, new, mixed-metal, hybrid compounds with the general formula [TBA]2[MoVI10CoII6O30(RpPO3)6(RcCOO)2(L)x(H2O)6] (TBA = tetrabutylammonium, Rp = phosphonate moiety, Rc = carboxylate moiety, L = pyridyl ligand, and x = 2-4), including a one-dimensional polyoxometalate-based coordination polymer. We propose that these structures are generated from {MoxO3x-1} fragments that cannot be accessed from bottom-up assembly alone. The POM clusters are stabilised by three distinct classes of organic ligand - organophosphonate, carboxylate and pyridyl ligands - which can each be substituted independantly, thus providing a controlled route to ligand functionalisation.
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Affiliation(s)
- Colm Healy
- School of Chemistry and CRANN, Trinity College Dublin, College Green, Dublin 2, Ireland.
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Xu Q, Li Y, Ban R, Li Z, Han X, Ma P, Singh V, Wang J, Niu J. Polyoxotungstates incorporated organophosphonate and nickel: synthesis, characterization and efficient catalysis for epoxidation of allylic alcohols. Dalton Trans 2018; 47:13479-13486. [DOI: 10.1039/c8dt02590h] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
“Top-down” synthetic strategy was performed to incorporate nickel into the organophosphonate-based POTs showing superior catalysis for the epoxidation of allylic alcohols.
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Affiliation(s)
- Qiaofei Xu
- Henan Key Laboratory of Polyoxometalate Chemistry
- Institute of Molecular and Crystal Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
| | - Yingguang Li
- Henan Key Laboratory of Polyoxometalate Chemistry
- Institute of Molecular and Crystal Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
| | - Ran Ban
- Henan Key Laboratory of Polyoxometalate Chemistry
- Institute of Molecular and Crystal Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
| | - Zhao Li
- Henan Key Laboratory of Polyoxometalate Chemistry
- Institute of Molecular and Crystal Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
| | - Xiao Han
- Henan Key Laboratory of Polyoxometalate Chemistry
- Institute of Molecular and Crystal Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
| | - Pengtao Ma
- Henan Key Laboratory of Polyoxometalate Chemistry
- Institute of Molecular and Crystal Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
| | - Vikram Singh
- Henan Key Laboratory of Polyoxometalate Chemistry
- Institute of Molecular and Crystal Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
| | - Jingping Wang
- Henan Key Laboratory of Polyoxometalate Chemistry
- Institute of Molecular and Crystal Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
| | - Jingyang Niu
- Henan Key Laboratory of Polyoxometalate Chemistry
- Institute of Molecular and Crystal Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
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