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Bruno SM, Valente AA, Gonçalves IS, Pillinger M. Group 6 carbonyl complexes of N,O,P-ligands as precursors of high-valent metal-oxo catalysts for olefin epoxidation. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2022.214983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Bagherzadeh M, Ataie S, Mahmoudi H, Janczak J. Synthesis, structure characterization and study of a new molybdenum Schiff base complex as an epoxidation catalyst with very high turnover numbers. INORG CHEM COMMUN 2017. [DOI: 10.1016/j.inoche.2017.07.025] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Mo(VI) Complexes Immobilized on SBA-15 as an Efficient Catalyst for 1-Octene Epoxidation. Catalysts 2017. [DOI: 10.3390/catal7070215] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
SBA-15 materials were functionalized through a post-synthetic methodology with molybdenum-Schiff bases to provide catalytic activity in epoxidation reactions. Thus, glycidoxypropyl functionalities were first attached to the surface of the mesostructured silica, followed by the reaction of the immobilized oxirane groups with 2-amino propyl pyridine. This reaction allowed the obtaining of (hydroxypropyl)-2-aminomethyl pyridine ligands, directly tethered to the surface of the mesoporous silica-based SBA-15, which resulted in excellent chelating ligands to immobilize dioxo molydenum species by a reaction with MoO2(acac)2. This investigation comprises a thorough characterization of the process for building the immobilized molybdenum-Schiff base complexes, as well as the use of the obtained materials in 1-octene oxidation in the presence of organic hydroperoxides. These materials displayed high intrinsic catalytic activity in the epoxidation of 1-octene with organic hydroperoxides under a wide variety of conditions, although both the reaction solvent as well as the nature of the organic hydroperoxide, exerted a dramatic influence on the catalytic activity of these heterogeneous oxidation catalysts. Thus, whereas nonpolar solvents provided good epoxide yields with high efficiency in the use of the oxidant, polar solvents depressed the catalytic activity of the supported Mo-Schiff bases. These results have been ascribed to the competition with the solvent, when polar, for binding to the metal sites, thus avoiding the formation of the hydroperoxo-metal cycle and the epoxidation of the olefin. The catalysts presented here show good reusability with low catalytic activity decay after the first reuse.
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Asgharpour Z, Farzaneh F, Ghiasi M, Azarkish M. Synthesis, characterization, density functional theory studies and antibacterial activity of a new Schiff base dioxomolybdenum(VI) complex with tryptophan as epoxidation catalyst. Appl Organomet Chem 2017. [DOI: 10.1002/aoc.3782] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Zeinab Asgharpour
- Department of Chemistry, Faculty of Physics and ChemistryAlzahra University PO Box 1993891176, Vanak Tehran Iran
| | - Faezeh Farzaneh
- Department of Chemistry, Faculty of Physics and ChemistryAlzahra University PO Box 1993891176, Vanak Tehran Iran
| | - Mina Ghiasi
- Department of Chemistry, Faculty of Physics and ChemistryAlzahra University PO Box 1993891176, Vanak Tehran Iran
| | - Mohammad Azarkish
- Department of ChemistryPayame Noor University (PNU) 19395‐4697 Tehran Iran
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Najafi M, Abbasi A, Masteri-Farahani M, Janczak J. Sonochemical Synthesis of a Nanosized Coordination Polymer with Catalytic Activity for Selective Epoxidation of Olefins. ChemistrySelect 2016. [DOI: 10.1002/slct.201601236] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Mahnaz Najafi
- School of Chemistry; College of Science; University of Tehran; Tehran Iran
| | - Alireza Abbasi
- School of Chemistry; College of Science; University of Tehran; Tehran Iran
| | | | - Jan Janczak
- Institute of Low Temperature and Structure Research; Polish Academy of Sciences; PO Box 1410 50-950 Wrocław Poland
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