Synthesis, structure, and magnetic property of one novel entangled cobaltii-organic compound

Document Type

Article

Publication Date

7-15-2011

Abstract

One novel entangled cobalt compound, {[Co3(nbta) 2(4,4′-bpy) 2 (H2O)2](H 2O) 2}n (1, H3nbta = 5-nitro-1,2,3-benzenetricarboxylic acid, 4,4′-bpy = 4,4′-bipyridyl), was prepared and characterized by X-ray diffraction, magnetism, elemental analysis, XPS, TGA and IR spectroscopy. The crystal of 1 crystallizes in monoclinic, space group Pc with a = 13.0717(16), b = 11.4167(14), c = 15.9342(19) Å, β = 90.5190(10)°, V = 2377.9(5) Å3, Z = 2, C48H 36Co3N8O20, Mr = 1221.64, Dc = 1.706 g/cm3, F(000) = 1242 and μ(MoKα) = 1.128 mm-1. The final R = 0.0497 and wR = 0.1461 for 4185 observed reflections with I > 2sigma;(I) and R = 0.0721 and wR = 0.1619 for all data. X-ray diffraction analyses revealed that Co(1) is linked by the nbta3- ligands to form the ladder shape along the c axis, which is further extended into two-dimensional networks via the joint of Co(2) along the a axis. Moreover, these two dimensional motifs are interconnected by the 4,4′-bpy bridges to form a complicated 3-D polymeric framework. Magnetic measurements revealed that compound 1 shows strong antiferromagnetic property.

Publication Source (Journal or Book title)

Jiegou Huaxue

First Page

995

Last Page

1000

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