Immobilization of Keggin polyoxovanadoniobate in crystalline solids to produce effective heterogeneous catalysts towards selective oxidation of benzyl-alkanes

Two ionic organic-inorganic hybrid compounds, [Cu (C N H ) ] [Cu (C N H ) (H O) ] [PNb O V V O ]·(OH) ·11H O (1) and [Co (C N H ) ] [Co (C N H ) (H O) ] [H PNb O V V O ]·20H O (2), based on P-centered dicapped polyoxoniobates and organometallic cations were isolated and structurally characterized by...

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Published in:Dalton transactions : an international journal of inorganic chemistry 2017, Vol.46 (25), p.8245-8251
Main Authors: Hu, Jufang, Dong, Jing, Huang, Xianqiang, Chi, Yingnan, Lin, Zhengguo, Li, Jikun, Yang, Song, Ma, Hongwei, Hu, Changwen
Format: Article
Language:English
Subjects:
Catalysis
Cations
Cobalt compounds
Crystal structure
Ketones
Metalorganic compounds
Oxidation
Strategy
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Summary:Two ionic organic-inorganic hybrid compounds, [Cu (C N H ) ] [Cu (C N H ) (H O) ] [PNb O V V O ]·(OH) ·11H O (1) and [Co (C N H ) ] [Co (C N H ) (H O) ] [H PNb O V V O ]·20H O (2), based on P-centered dicapped polyoxoniobates and organometallic cations were isolated and structurally characterized by routine techniques. The trivalent cobalt complex-containing compound exhibits a looser arrangement compared with its divalent copper complex-containing counterpart, with a space volume of 34.9% for the former and 17.0% for the latter. The two compounds were proved to be effective in facilitating the oxidation of benzyl-alkanes to ketone products in a heterogeneous manner, evidencing the feasiblity of the strategy of self-immobilization of catalytically active, readily soluble PNb O (VO) species in crystalline solids.
ISSN:1477-9226
1477-9234
DOI:10.1039/c7dt01122a