Issue 2, 2016

Immobilization of a molybdenum complex on the surface of magnetic nanoparticles for the catalytic epoxidation of olefins

Abstract

Novel organic–inorganic hybrid heterogeneous nanocatalysts were obtained by covalent anchoring of a molybdenum(VI) complex of salicylidene 2-picoloyl hydrazine, MoO2(sal-phz)(CH3OH), (1) on the surface of magnetic nanoparticles functionalized by one of two routes: in the first method, the surface of magnetic nanoparticles is directly modified with 3-chloropropyltrimethoxysilane yielding 1A. In the second method, magnetic nanoparticles were silica-coated with tetraethoxysilane and then with 3-chloropropyltrimethoxysilane yielding the intermediate 2B. Then complex 1 was grafted on the surface of 1A or 2B through covalent interaction yielding 2A or 3B, respectively. The nanocatalysts 2A and 3B were characterized by FT-IR, XRD, SEM, TGA, EDX and vibrating sample magnetometry techniques. Nanocomposite 2A shows a much higher catalytic activity and stability in liquid phase epoxidation reactions, with t-BuOOH as the oxidant, compared to that of 3B. Additionally, the results of comparative study show that 2A is more active and reusable than the Mo complex immobilized SBA-15.

Graphical abstract: Immobilization of a molybdenum complex on the surface of magnetic nanoparticles for the catalytic epoxidation of olefins

Article information

Article type
Paper
Submitted
20 Aug 2015
Accepted
24 Nov 2015
First published
25 Nov 2015

New J. Chem., 2016,40, 1580-1586

Immobilization of a molybdenum complex on the surface of magnetic nanoparticles for the catalytic epoxidation of olefins

M. Zare, Z. Moradi-Shoeili, M. Bagherzadeh, S. Akbayrak and S. Özkar, New J. Chem., 2016, 40, 1580 DOI: 10.1039/C5NJ02218E

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