Issue 11, 2010

Inorganic–organic hybrid compounds based on the co-existence of different isomers or forms of polymolybdate

Abstract

Three novel compounds co-existing isomers or forms of polymolybdate, namely, {[Ni(γ-Mo8O26)(H2L1)2(H2O)2](γ-Mo8O26)(H2L1)}·2H2O (1), {[Co(γ-Mo8O26)(H2L1)2(H2O)2](β-Mo8O26)[Co(H2O)6]}·6H2O (2) and [CuI6L24(β-Mo8O26)(Mo6O19)] (3), where L1 = 1,1′-bis(pyridin-3-ylmethyl)-2,2′-biimidazole, L2 = 3-((1H-1,2,4-triazol-1-yl)methyl)pyridine, have been successfully synthesized. Crystal structure analysis reveals that 1 is a 1D + 1D supramolecular structure containing both γ-[Mo8O26N2] and γ-[Mo8O28] units; 2 has γ-[Mo8O26]4− as well as β-[Mo8O26]4− anions and 3 is a (3,4,6)-connected 2D network containing both β-[Mo8O26]4− and [Mo6O19]2− anions. According to quantum chemical calculations, the transformation from β-[Mo8O26]4− to [Mo6O19]2− is spontaneous in aqueous solution. Furthermore, we have investigated the optical band gap of compounds 1 and 3, with 3 showing a lower band gap (1.69 eV). Additionally, the photoluminescent property of 3 is also studied, which can be assigned to metal-to-ligand charge transfer (MLCT).

Graphical abstract: Inorganic–organic hybrid compounds based on the co-existence of different isomers or forms of polymolybdate

Supplementary files

Article information

Article type
Paper
Submitted
26 Jan 2010
Accepted
11 May 2010
First published
07 Jul 2010

CrystEngComm, 2010,12, 3684-3690

Inorganic–organic hybrid compounds based on the co-existence of different isomers or forms of polymolybdate

H. Zang, K. Tan, W. Guan, S. Li, G. Yang, K. Shao, L. Yan and Z. Su, CrystEngComm, 2010, 12, 3684 DOI: 10.1039/C001593H

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