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Indexed by:期刊论文

Date of Publication:2012-07-01

Journal:INORGANIC CHEMISTRY COMMUNICATIONS

Included Journals:SCIE

Volume:21

Page Number:84-87

ISSN No.:1387-7003

Key Words:Cyanide; Crystal structure; Ferromagnetic coupling; Electrochemistry

Abstract:The reaction of tricyanometallate precursor, (Bu4N)[(Tp*)Fe(CN)(3)] (Tp* = hydrotris(3,5-dimethylpyrazol-1-yl)borate) with Co(ClO4)(2)center dot 6H(2)O in the presence of the bidentate dpa (dpa=2,2'-dipyridyl amine) ligand affords one novel cyano-bridged heterobimetallic {Fe2Co2} molecular square, [Fe-III(Tp*)(CN)(3)](2)[Co-II(dpa)(2)](2)center dot 2ClO(4)center dot 4H(2)O center dot 4CH(3)OH (1). The molecular structure was determined by single-crystal X-ray diffraction. In compound 1. Fe-III ion is coordinated by three cyanide carbon atoms and three nitrogen atoms of Tp* anions. Whereas, the Co-II ion is surrounded by two cyanide nitrogen atoms and four nitrogen atoms from two bidentate dpa ligands. Cyclic voltammetry (CV) measurements showed that complex 1 exhibited one quasi-reversible waves (0.1 V vs SCE) in the reduction process, and irreversible waves in the oxidation process. Magnetic measurements indicate that complex 1 exhibits a strong intramolecular ferromagnetic interaction between the low-spin Fe-III(S = 1/2) and high-spin Co-II(S = 3/2) ions. (C) 2012 Elsevier B.V. All rights reserved.