Tethering of nickel(II) Schiff-base complex onto mesoporous silica: An efficient heterogeneous catalyst for epoxidation of olefins

Polyhedron ◽  
2011 ◽  
Vol 30 (11) ◽  
pp. 1857-1864 ◽  
Author(s):  
Susmita Bhunia ◽  
Subratanath Koner
Keyword(s):  
Schiff Base ◽  
Mesoporous Silica ◽  
Heterogeneous Catalyst ◽  
Schiff Base Complex ◽  
Base Complex ◽  
Epoxidation Of Olefins ◽  
Efficient Heterogeneous Catalyst

A palladium(II) 4-hydroxysalicylidene Schiff-base complex anchored on functionalized MCM-41: An efficient heterogeneous catalyst for the epoxidation of olefins

2014 ◽  
Vol 488 ◽  
pp. 148-159 ◽  
Author(s):  
Hassan M.A. Hassan ◽  
Eman M. Saad ◽  
Mohamed S. Soltan ◽  
Mohamed A. Betiha ◽  
Ian S. Butler ◽  
...  
Keyword(s):  
Schiff Base ◽  
Heterogeneous Catalyst ◽  
Schiff Base Complex ◽  
Base Complex ◽  
Epoxidation Of Olefins ◽  
Mcm 41 ◽  
Efficient Heterogeneous Catalyst

Encapsulation of a copper(II) tetradentate Schiff base complex in zeolite NaY: an efficient heterogeneous catalyst for the synthesis of benzimidazoles

2015 ◽  
Vol 40 (3) ◽  
pp. 313-320 ◽  
Author(s):  
Akbar Mobinikhaledi ◽  
Mojgan Zendehdel ◽  
Seyed Mohammad-Bagher Hosseini-Ghazvini ◽  
Parvin Safari
Keyword(s):  
Schiff Base ◽  
Heterogeneous Catalyst ◽  
Schiff Base Complex ◽  
Base Complex ◽  
Zeolite Nay ◽  
Tetradentate Schiff Base ◽  
Efficient Heterogeneous Catalyst

Zeolite-encapsulated Ru(III) tetrahydro-Schiff base complex: An efficient heterogeneous catalyst for the hydrogenation of benzene under mild conditions

2006 ◽  
Vol 7 (12) ◽  
pp. 969-973 ◽  
Author(s):  
Ping Chen ◽  
Binbin Fan ◽  
Minggang Song ◽  
Chun Jin ◽  
Jinghong Ma ◽  
...  
Keyword(s):  
Schiff Base ◽  
Heterogeneous Catalyst ◽  
Schiff Base Complex ◽  
Base Complex ◽  
Mild Conditions ◽  
Efficient Heterogeneous Catalyst

Co-Condensation Assisted Preparation of MoVI Schiff Base Modified Mesoporous Silica Catalyst for Enhanced Epoxidation of Olefins

2016 ◽  
Vol 69 (8) ◽  
pp. 817 ◽  
Author(s):  
Jian Zhang ◽  
Pingping Jiang ◽  
Yirui Shen ◽  
Guohu Zhao ◽  
Weijie Zhang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Schiff Base ◽  
Mesoporous Silica ◽  
Heterogeneous Catalyst ◽  
Schiff Base Complex ◽  
Mesoporous Structure ◽  
Optimum Reaction ◽  
Catalyst Reusability ◽  
Adsorption Desorption ◽  
Epoxidation Of Olefins

An organic–inorganic catalyst was prepared by the reaction of p-salicylidine aminobenzoic acid with mesoporous silica modified with 3-chloropropyl groups. The hydrolysis and co-condensation of tetraethylorthosilicate (TEOS) and 3-chloropropyltrimethoxysilane (CPTES) took place during the preparation process. MoO2(acac)2 was then introduced into the mesoporous silica functionalized with a Schiff base ligand. The structural properties of the prepared catalysts were investigated by a series of techniques, such as elemental analysis, X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectra, scanning electron microscopy (SEM), transmission electron microscopy (TEM), N2 adsorption/desorption curves, and thermogravimetric analysis (TGA). The results demonstrated that the MoVI Schiff base complex was successfully tethered on the silica support, and the hexagonally ordered mesoporous structure of the SBA-15-type silica was well retained after the anchoring reaction. The heterogeneous catalyst showed good catalytic activities in the liquid-phase epoxidation of olefins with t-BuOOH as the oxygen source in 1,2-dichloroethane solvent at 80°C. Several important factors, including oxidant-to-substrate ratio, solvent, and catalyst reusability, were investigated. Under the optimum reaction conditions, using this heterogeneous catalyst for the cyclohexene epoxidation reaction, a high conversion of 97.20 % and selectivity of >99 % was achieved after 4 h, while the catalytic activity nearly remained unchanged over four runs.

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