Polynuclear CdII Polymers: Crystal Structures, Topologies, and the Photodegradation for Organic Dye Contaminants

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• 作者：Lu Liu ; Jie Ding ; Chao Huang ; Ming Li ; Hongwei Hou ; Yaoting Fan
• 刊名：Crystal Growth & Design
• 出版年：2014
• 出版时间：June 4, 2014
• 年：2014
• 卷：14
• 期：6
• 页码：3035-3043
• 全文大小：561K
• 年卷期：v.14,no.6(June 4, 2014)
• ISSN：1528-7505

文摘

To systematically explore the effect of polynuclear complexes on photocatalytic degradation of the organic dyes, a series of coordination complexes containing Cd^II clusters, formulated as {[Cd₃L₂(H₂O)₅]路H₂O}_n (1), {[Cd₃L₂(hbmb)(H₂O)₂]路2.5H₂O}_n (2), {[Cd₃L₂(btbb)(H₂O)₂]路2EtOH路1.5H₂O}_n (3), and {[Cd₆L₄(bipy)₂(H₂O)₆]路3H₂O}_n (4) (H₃L = 3,4-bi(4-carboxyphenyl)-benzoic acid, hbmb = 1,1鈥?(1,6-hexane)bis(2-methylbenzimidazole), btbb = 1,4-bis(2-(4-thiazolyl)benzimidazole-1-ylmethyl)benzene, 4,4鈥?bipy = 4,4鈥?bipyridine), have been designed and synthesized. Complex 1 based on trinuclear Cd^II clusters exhibits a new (3,3,6)-connected 3D framework. 2 belongs to a (3,3,8,8)-connected tfz-d topology net with pillar-layered frameworks assembled by two kinds of trinuclear Cd^II clusters. 3 is a 3D pillar-layered framework, which features a (3,8)-connected tfz-d net based upon one kind of trinuclear Cd^II cluster. 4 presents a new 3D (3,6,10)-connected framework with dinuclear and tetranuclear clusters. The photocatalytic properties of complexes 1鈥?b>4 have been studied in detail. Remarkably, 1鈥?b>4 all reveal good photocatalytic activity in MB/MO degradation. The optical energy gap calculated by the diffuse reflectivity spectra of 1鈥?b>4 are consistent with their degradation rates. Moreover, the experimental results further demonstrate that the cluster complexes containing different kinds of nuclei may exert different impact on the decomposition of disparate organic dyes.