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http://dx.doi.org/10.5012/bkcs.2009.30.5.1113

Copper(II) Coordination Polymers Assembled from 2-[(Pyridin-3-ylmethyl)amino]ethanol: Structure and Magnetism  

Han, Jeong-Hyeong (Department of Chemistry Education, Kyungpook National University)
Shin, Jong-Won (Department of Chemistry, Kyungpook National University)
Min, Kil-Sik (Department of Chemistry Education, Kyungpook National University)
Publication Information
Bulletin of the Korean Chemical Society / v.30, no.5, 2009 , pp. 1113-1117 More about this Journal
Abstract
The one-dimensional coordination polymers, $[Cu^{II}(L)(NO_3)_2]_n$ (1) and {$[Cu^{II}(L)(NO_3)]{\cdot}2H_2O}_{2n} (2), were synthesized from $Cu(NO_3)_2{\cdot}3H_2O$ and 2-[(pyridin-3-ylmethyl)amino]ethanol (L, PMAE) in methanol by controlling the molar ratio of copper(II) salt. Copper(II) ion in 1 has one pyridine group of PMAE whose an aminoethanol group coordinates adjacent copper(II) ion. As the pyridine group is bonded to neighboring copper(II) ion, 1 becomes a one-dimensional chain. Contrary to 1, the structure of 2 shows that the oxygen atom of ethoxide group is bridged between two copper(II) ions, which forms a dinuclear complex. Additionally, the pyridine group of PMAE included one dinuclear unit is coordinated to the other dimeric one each other, which leads to a one-dimensional polymer. Due to the structural differences, 1 exhibits weak antiferromagnetic interaction, while 2 shows strong antiferromagnetic interaction. Due to direct spin exchange via oxygen of PMAE 2 has a much strong spin coupling than 1.
Keywords
Copper(II) complex; Ligand; Coordination polymer; Crystal structure; Magnetic properties
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