Six-, seven- and eight-coordinated Cd(II) ions with N-heterocyclic multicarboxylic acids

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• 作者：Hong-Sheng Wang ; Wei Shi ; Jun Xia ; Hai-Bin Song ; Hong-Gen Wang ; Peng Cheng
• 关键词：2 ; 4 ; 6-Pyridinetricarboxylic acid ; 2 ; 3 ; 5 ; 6-Pyrazinetetracarboxylic acid ; Cadmium complex ; Crystal structure
• 刊名：Inorganic Chemistry Communications
• 出版年：2007
• 出版时间：August 2007
• 年：2007
• 卷：10
• 期：8
• 页码：856-859
• 全文大小：480 K

文摘

Two novel cadmium complexes [Cd₃(pta)₂(H₂O)₄]_n (1) (H₃pta = 2,4,6-pyridinetricarboxylic acid) and {[Cd(H₂pza)(H₂O)₂] · 2H₂O}_n (2) (H₄pza = 2,3,5,6-pyrazinetetracarboxylic acid) were synthesized. In both complexes, Cd(II) ions show three different coordination numbers of six and seven in 1 and eight in 2, respectively. Complex 1 displays a three-dimensional network structure and 2 shows a one-dimensional chain structure. The one-dimensional chains in 2 are vertical or parallel to each other and form a three-dimensional network structure by hydrogen bonds. In addition, 1 emits intense fluorescence on excitation of 342 nm.