Issue 25, 2010
From the journal:

Dalton Transactions

Synthesis and characterisation of Mn(ii), Co(ii) and Cd(ii) coordination polymers of 1,2,4-triazole-3, 5-dicarboxylic acid†

Qi Ma,ab   Miaoli Zhu,*ac   Liping Lu,*a   Sisi Fenga  and  Tianwei Wangc  

* Corresponding authors

a Institute of Molecular Science, Key Laboratory of Chemical Biology and Molecular Engineering of the Education Ministry, Shanxi University, Taiyuan, Shanxi, People's Republic of China
E-mail: miaoli@sxu.edu.cn, luliping@sxu.edu.cn

b College of Chemistry and Chemical Engineering, Shanxi Datong University, Datong, Shanxi, People's Republic of China

c State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing, P. R. China

Abstract

Three new coordination polymers ([Mn3(dctrz)2(H2O)8]n (1), [Co(Hdctrz)(H2O)3]n (2) and [Cd(Hdctrz)(H2O)2]n (3), H3dctrz, 1-H-1,2,4-triazole-3,5-dicarboxylic acid) based on the self-assembly of Mn2+, Co2+ and Cd2+ ions with H3dctrz have been synthesized and characterized by single crystal X-ray diffraction analysis. Variable temperature magnetic studies are investigated for complexes 1 and 2. Complex 1 is assembled into a one-dimensional molecular chain via trinuclear units formed from two dctrz anion bridges and eight coordination waters. In 2, the central Co2+ cations with six-coordinated octahedron geometry are bridged by Hdctrz anions to form one-dimensional zigzag chain structures. Complex 3 displays a 2D rhombus grid-like architecture with a (4, 4) topology, achieved through Hdctrz anion bridges. Both complexes 1 and 2 exhibit S = 5/2 (Mn2+) and S = 3/2 (Co2+) spin Heisenberg chains with alternating and regular magnetic sequences. Variable temperature (1.8–300 K) magnetic studies indicate weak antiferromagnetic coupling between the metal centres in complexes 1 and 2.

Graphical abstract: Synthesis and characterisation of Mn(ii), Co(ii) and Cd(ii) coordination polymers of 1,2,4-triazole-3, 5-dicarboxylic acid

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Article information

DOI
https://doi.org/10.1039/C000940G
Article type
Paper
Submitted
15 Jan 2010
Accepted
23 Apr 2010
First published
26 May 2010

Dalton Trans., 2010,39, 5877-5884

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Synthesis and characterisation of Mn(II), Co(II) and Cd(II) coordination polymers of 1,2,4-triazole-3, 5-dicarboxylic acid

Q. Ma, M. Zhu, L. Lu, S. Feng and T. Wang, Dalton Trans., 2010, 39, 5877 DOI: 10.1039/C000940G

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