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Reversible single-crystal-to-single-crystal transformation and highly selective adsorption property of three-dimensional cobalt(II) frameworks

Inorganic Chemistry, ISSN: 0020-1669, Vol: 50, Issue: 3, Page: 985-991
2011
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Article Description

A three-dimensional (3D) coordination polymer, [Co(L) (BTEC)(HO)] · 2HO [1, HL = 3,5-di(imidazol-1-yl)benzoic acid, HBTEC = 1,2,4,5- benzenetetracarboxylic acid], with tfz-d topology has been hydrothermally synthesized. The framework of 1 has high thermal stability and exhibits single-crystal-to-single-crystal (SCSC) transformations upon removing and rebinding the noncoordinated and coordinated water molecules. X-ray crystallographic analyses revealed that the coordination geometry of Co(II) changes from octahedral to square pyramid upon dehydration, accompanying the appearance of one-dimensional (1D) open channels with dimensions of 2.0 × 2.8 A. The dehydrated form [Co(L)(BTEC)] (2) exhibits highly selective adsorption of water molecules over N,CH OH, and CHChOH, which could be used as sensors for water molecules. Furthermore, the magnetic properties of 1 and 2 were investigated, showing the existence of ferromagnetic interaction between the Co(II) atoms within the trinuclear subunit. © 2011 American Chemical Society.

Bibliographic Details

Su, Zhi; Chen, Min; Okamura, Taka-aki; Chen, Man-Sheng; Chen, Shui-Sheng; Sun, Wei-Yin

American Chemical Society (ACS)

Chemistry

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