Abstract
A new coordination polymer, namely, [Cd2(L)(bimid)(DMF)2]·(DMF) (1), was solvothermally prepared in the presence of the flexible tetrahedral carboxylate ligand tetrakis[(4-carboxyphenyl)oxamethyl]-methane acid (H4L) and benzimidazole (bimid) ligand. The compound possesses 2-fold interpenetrating 3D frameworks, and there are uncoordinated nitrogen atoms of imidazole groups in the framework. Topological analysis reveals that complex 1 is a classical 4-connected diamond (dia) net. Compound 1 exhibited strong blue fluorescence emission at room temperature upon excitation. Fluorescence titration shows the emission intensity of the compound 1 varied upon contacting with different solvents or analytes, exhibiting selective emission quenching responses towards Fe3+ ion and nitroaromatics which suggests that compound 1 is a dual-responsive luminescent sensor material for Fe3+ ion and nitroaromatics.
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