Unusual magnetic property and theoretical analysis of 1D molecular solid [1-(4'-iodobenzyl)-4-aminopyridinium][Ni(mnt)(2)] (mnt(2-)= maleonitriledithiolate)

Ni CL; Song Y; Meng QJ

Chemical Physics Letters, Vol.419, No.4-6, 351-355, 2006

DOI10.1016/j.cplett.2005.11.103 Export Citation

Unusual magnetic property and theoretical analysis of 1D molecular solid [1-(4'-iodobenzyl)-4-aminopyridinium][Ni(mnt)(2)] (mnt(2-)= maleonitriledithiolate)

Ni CL, Song Y, Meng QJ

A novel molecular solid, [1-(4'-iodobenzyl)-4-aminopyridinium][Ni(mnt)(2)] (mnt(2-) = maleonitriledithiolate), [IBzPyNH(2)][Ni(mnt)(2)] (1), has been structurally characterized and its magnetic properties investigated. The Ni(mnt)(2)(-) anions and [IBzPyNH(2)](+) cations of 1 form completely segregated uniform stacking columns with the Ni... Ni distances 4.001 angstrom in the Ni(mnt)(2)(-) stacking column through intermolecular Ni... S,S... S, Ni... Ni or pi... pi interactions. The temperature dependences of the magnetic susceptibilities of 1 reveal that 1 exhibits antiferromagnetic interaction (J = - 13.8 cm(-1)) above 100 K and ferromagnetic interaction (J = 5.5 cm(-1)) below 100 K. The weak ferromagnetism in low temperature may result from spin canting. (c) 2005 Elsevier B.V. All rights reserved.