[Cu(H(2)btec)(bipy)](infinity): a novel metal organic framework (MOF) as heterogeneous catalyst for the oxidation of olefins

Brown K; ZOLEZZI, S; Aguirre P.; Venegas-Yazigi, D; Paredes-Garcia, V; Baggio R.; Novak MA.; Spodine, E.

Abstract

A new extended metal-organic framework [Cu(H2btec)(bipy)] 8 (1) (H4btec= 1,2,4,5-benzenetetracarboxylic acid; bipy= 2,2'-bipyridine) has been hydrothermally synthesized. Violet crystals are formed in a monoclinic system with a space group C2/c; a = 10.1810(18) Å, b = 14.4360(18) Å, c= 12.894(3) Å, ß= 112.94(3)°. In the title compound 1 each Cu(II) centre has a distorted square planar environment, completed by two N atoms from one bipy ligand and two O atoms belonging to two dihydrogen benzene-1,2,4,5-tetracarboxylate anions (H2btec2-). The {Cu(bipy)}2+ moieties are bridged by H2btec2- anions to form an infinite one-dimensional coordination polymer with a zig-zag chain structure along the c axis. A double-chain structure is formed by hydrogen bonds between adjacent zig-zag chains. There are also p-p stacking interactions between the bipy ligands, with an average distance of 3.62 Å resulting in a two-dimensional network structure. Compound 1 was tested as a catalyst for the oxidation of cyclohexene and styrene, with tert-butyl hydroperoxide (TBHP) as oxidant. The catalytic activity (24 h and 75 °C) found for [Cu(H2btec)(bipy)] 8 shows a high value for the conversion of cyclohexene (64.5%), and a lower one for styrene (23.7%). High turnover frequency (TOF) values for the epoxide products were observed, indicating that the catalyst synthesized in this work, not only has a high activity and selectivity for epoxidation reactions but is also very efficient. This journal is © 2009 The Royal Society of Chemistry.

Más información

Título según WOS: [Cu(H(2)btec)(bipy)](infinity): a novel metal organic framework (MOF) as heterogeneous catalyst for the oxidation of olefins
Título según SCOPUS: [Cu(H2btec)(bipy)?: A novel metal organic framework (MOF) as heterogeneous catalyst for the oxidation of olefins
Título de la Revista: DALTON TRANSACTIONS
Número: 8
Editorial: ROYAL SOC CHEMISTRY
Fecha de publicación: 2009
Página de inicio: 1422
Página final: 1427
Idioma: English
URL: http://xlink.rsc.org/?DOI=b810414j
DOI:

10.1039/b810414j

Notas: ISI, SCOPUS