1. Structures and magnetic properties of two heterometallic Cu(II)–Cd(II) polymers exhibiting antiferromagnetic ordering.
- Author
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Li, Zhong-Yi, Zhang, Ran, Zhu, Peng-Yu, Zhang, Chi, Wu, Dong-Qing, and Zhai, Bin
- Subjects
COORDINATION polymers ,MAGNETIC structure ,MAGNETIC properties ,NIACIN ,METHYLMALONIC acid ,POLYMERS - Abstract
Two novel heterometallic Cu(II)–Cd(II) coordination polymers, two-dimensional (2D) [Cu
2 Cd(MMA)2 (NTA)2 (H2 O)2 ]n (1) and one-dimensional (1D) {[CuCd(MMA)2 (H2 O)6 ]·4H2 O}n (2), were synthesized with methylmalonic acid (H2 MMA) and nicotinic acid (HNTA) as mixed reactants under the conditions of 100 °C and room temperature, respectively. Complex 1 has a 2D layer structure consisting of the tetranuclear [Cu2 Cd2 ] cluster-based 1D chain unit and NTA− linker. 2 exhibits a 1D chain structure with the Cu2+ and Cd2+ ions alternately bridged by the MMA2− ligand. Magnetic studies show that the magnetic interactions for the neighboring Cu2+ ions are both antiferromagnetic within and between the [Cu2 Cd2 ] cluster of the 1D chain in 1 (Jd = −1.39(1) cm−1 and Jc = −1.77(1) cm−1 ) and there is predominantly ferromagnetic coupling in the 1D chain of 2 (J = 4.96(1) cm−1 ). Furthermore, 1 displayed antiferromagnetic ordering at lower temperature with TN = 4.0 K. [ABSTRACT FROM AUTHOR]- Published
- 2022
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