화학공학소재연구정보센터
Chemical Engineering Journal, Vol.173, No.2, 651-658, 2011
Oxovanadium(IV) salophen complex covalently anchored to multi-wall carbon nanotubes (MWNTs) as heterogeneous catalyst for oxidation of cyclooctene
The chemical modification of multi-wall carbon nanotubes (MWNTs) is an emerging area in material science. In the present study, hydroxyl functionalized oxovanadium(IV) Schiff-base; (N,N-bis(4-hydroxysalicylidene)phenylene-1,2-diamine)oxovanadium(IV), [VO((OH)(2)-salophen)]; has been covalently anchored on modified MWNTs. The new modified MWNTs ([VO((OH)(2)-salophen)]@MWNTs]) have been characterized by transmission electron microscopy (TEM), atomic absorption spectroscopic (AAS) analysis, X-ray diffraction (XRD), Diffuse reflectance (DRS) UV-vis, FT-IR spectroscopy and elemental analysis. The analytical data indicated a composition corresponding to the mononuclear complex of tetradentate Schiff-base ligand. The characterization of the data showed the absence of extraneous complex, retention of MWNTs and covalently anchored on modified MWNTs. Liquid-phase oxidation of cyclooctene with molecular oxygen to a mixture of cyclooctene-1-one, cyclooctene-1-ol and cyclooctene epoxide in CH3CN have been reported using oxovanadium(IV) Schiff-base complex covalently anchored on modified MWNTs as catalysts. (C) 2011 Elsevier B.V. All rights reserved.