Utilization of a ligand containing 2,2 '-bipyridyl and tetrazolate groups to construct a 2D Co(II) coordination polymer: spin canting and metamagnetism

作者：Tsai Jia Dong; Yang Chen I^*

来源：Dalton Transactions, 2014, 43(41): 15576-15582.

DOI：10.1039/c4dt01793e

The use of anions of 6,6'-bis(1H-tetrazol-5-yl)-2,2'-bipyridine (H(2)btzbp) as chelating ligands in preparing a coordination polymer is described. The synthesis, X-ray crystal structure and magnetic properties of a new Co(II) coordination polymer, [Co(btzbp)](n) (1), are reported. The in situ [2 + 3] cycloaddition reaction of 6,6'-dicyano-2,2'-bipyridine with sodium azide in the presence of Co(ClO4)(2) under hydrothermal conditions afforded compound 1. Structural characterization revealed that 1 features a distorted two-dimensional (2D) grid layer generated by both tetrazolate and 2,2'-bipyridyl bridges of the btzbp(2)-ligand. Variable temperature and field magnetic susceptibility measurements indicate that compound 1 exhibits spin canting with T-N = 4.0 K and metamagnetism with H-c = 300 G.

• 出版日期2014