Zhiwu Wang, Min Yu, T. Li
Nov 7, 2013
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0
Influential Citations
11
Citations
Journal
Journal of Coordination Chemistry
Abstract
Two new complexes, {[Cd(btec)0.5(imb)(CH3OH)]·CH3OH}n (1) and {[Cd(btec)0.5(H2btec)]·(H2imb)·2H2O}n (2) (H4btec = 1,2,4,5-benzenetetracarboxylic acid, imb = 2-(1H-imidazol-1-methyl)-1H-benzimidazole), have been synthesized and characterized by elemental analysis and single-crystal X-ray diffraction. Both complexes exhibit 2-D network structures. In 1, each 1,2,4,5-benzenetetracarboxylate links four Cd2+ cations, and each Cd2+ cation connects two 1,2,4,5-benzenetetracarboxylates, to form a 2-D layer, with the imb ligands located on each side of the 2-D layer. In 2, there are two kinds of 1,2,4,5-benzenetetracarboxylates in the structure. One kind is completely deprotonated and acts as hexadentate linkers, leading to a 2-D layer. The other kind is only doubly deprotonated and decorates each side of the 2-D layer. In 2, imb is protonated, forming (H2imb)2+ cations that only cocrystallize with the negatively charged Cd coordination polymer ({[Cd(btec)0.5(H2btec)]2−}n), but does not coordinate to the Cd2+ cations. IR spectra, PXRD patterns, thermogravimetric analyses, and fluorescent properties of 1 and 2 have also been determined.