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Journal of Coordination Chemistry
Year: 2008  |  Volume: 61  |  Issue: 12  |  Page No.: 1997 - 2007

Two cadmium(II) 1-D coordination polymers, lcub[Cd2(μ-Cl)4Cl2(CH3OH)(H2O)] · (H-aql)2rcubn and [Cd(μ-Cl)2(aql)]n: synthesis, crystal structures and fluorescent properties

Caoyuan Niu, Xinsheng Wan, Xianfu Zheng, Hongyun Zhang, Benlai Wu, Yunyin Niu and Hongwei Hou    

Abstract: Two Cd(II) 1-D chain coordination polymers with Cd-Cl-Cd-Cl 1-D chains as bases, one connected to protonated 8-aminoquinoline by intermolecular hydrogen bonds lcub[Cd2(μ-Cl)4(Cl)2(CH3OH)(H2O)]·(H-aql)2rcubn (1) (aql = 8-aminoquinoline) and the other to 8-aminoquinoline [Cd(μ-Cl)2(aql)]n (2), have been synthesized and structurally characterized by single-crystal X-ray analysis. 1 belongs to the monoclinic system with space group P2(1)/m and 2 belongs to the monoclinic system with space group C2/c. Fluorescent properties of aql, 1, and 2 showed that the fluorescence spectrum (λmax = 386 nm) of 1 is mainly of aql ππ* character. The fluorescence spectrum of 2 which emits blue-green light (λmax = 497 nm) mainly involves a metal-perturbed intraligand ππ* transition from strong covalent bonds. Thermal stabilities of 1 and 2 have also been studied.

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