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Z. Naturforsch. 2012, 67b, 791 – 798
doi:10.5560/ZNB.2012-0158
Assembly of Three Cadmium(II) Complexes Based on Flexible α,ω-Bis(benzimidazolyl)alkane Ligands
Jian-Chen Geng, Cui-Huan Jiao, Jin-Ming Hao, and Guang-Hua Cui
College of Chemical Engineering, Hebei United University, 46 West Xinhua Road, Tangshan 063009, Hebei, P. R. China
Reprint requests to Prof. G.-H. Cui. E-mail: tscghua@126.com
Received June 10, 2012 / published online August 20, 2012
Three flexible α, ω-bis(5,6-dimethylbenzimidazolyl)alkane ligands with different spacers were reacted with CdX2 (X = Cl, Br, I) hydrothermally, resulting in three coordination architectures, namely [CdI2(L1)]n (1), [CdBr2(L2)]n (2), and Cd2Cl4(L3)2 (3) [L1 = 1,3-bis(5,6-dimethylbenzimidazole)propane, L2 = 1,5-bis(5,6-dimethylbenzimidazole)pentane, L3 = 1,6-bis(5,6-dimethylbenzimidazole)hexane]. They have been characterized by elemental analyses, IR spectra, thermogravimetric (TG) analysis, and single-crystal X-ray diffraction. Complex 1 displays a helical chain linked by the ligands L1, and a 2D supramolecular network is constructed through π − π stacking interactions; complex 2 shows a helical chain structure with connections through two kinds of strong π − π stacking interactions into an intricate 3D supramolecular network; complex 3 contains dinuclear metallomacrocycles. The fluorescence properties of 13 have been investigated in the solid state.
Key words: α, ω-Bis(5,6-dimethylbenzimidazolyl)alkanes, Cadmium(II), Different Spacers, Fluorescence Properties
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