An anionic metal-organic framework based on infinite [In3(兪3-OH)2]_n inorganic chains synthesized in ionic liquid

摘要

A 3D metal-organic framework, namely, {[EMlM][In3(M3-OH)2(l,2,4,5-BTC)2丒2H2O]}_n (1) (1,2,4,5-BTC= 1,2,4,5-benzenetetracarboxylate), was synthesized by using l-ethyl-3- methylimidazolium bromide ([EMIM] Br) ionic liquid as solvent. The 7-coordinated pentagonal bipyramidal ln(1) and octahedral In(2) atoms are connected by the 兪3-OH groups to form an infinite [In3(兪3-OH)2]_n inorganic chain along the 兛-axis, which are further extended by 1,2,4,5-BTC ligands to generate the 3D anionic microporous framework of 1. The [EMIM)~+ cations occupy the ID channels acting as template and charge-balancing species. Compound 1 shows strong blue luminescence and remarkable photocatalytic degradation of methylthionine chloride.