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Tricomponent Azide, Tetrazolate, and Carboxylate Cobridging Magnetic Systems: Ferromagnetic Coupling, Metamagnetism, and Single‐Chain Magnetism
Author(s) -
Li XiuBing,
Zhang JianYong,
Wang YanQin,
Song You,
Gao EnQing
Publication year - 2011
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201101477
Subject(s) - metamagnetism , ferromagnetism , crystallography , antiferromagnetism , azide , magnetism , isostructural , paramagnetism , magnetization , magnetic anisotropy , magnetic susceptibility , materials science , carboxylate , condensed matter physics , chemistry , magnetic field , crystal structure , stereochemistry , physics , organic chemistry , quantum mechanics
Three novel coordination polymers with azide and a bifunctional zwitterionic ligand bearing carboxylate and tetrazolate as bridging groups, [M(L)(N 3 )]⋅ x H 2 O [L=1‐(carboxylatomethyl)‐4‐(5‐tetrazolato)pyridinium, M=Cu ( 1 , x =2), Ni ( 2 , x =1), and Co ( 3 , x =1)], have been synthesized and characterized by X‐ray crystallography and magnetic measurements. The compounds consist of two‐dimensional coordination layers in which uniform anionic chains with the unprecedented tricomponent (μ‐azide)(μ‐tetrazolate)(μ‐carboxylate) bridges are cross‐linked by cationic 1‐methylenepyridinium spacers. The tricomponent bridges induce ferromagnetic interactions in all the compounds. Furthermore, this isostructural series of ferromagnetic‐chain‐based compounds has allowed us to observe distinct bulk properties that are dependent upon the natures of the different spin carriers: with the isotropic Cu II ion, 1 exhibits a paramagnetic phase of the ferromagnetic chains without long‐range magnetic order above 2 K; with the weakly anisotropic Ni II ions, 2 displays antiferromagnetic ordering and field‐induced metamagnetism without slow dynamic relaxation; and with Co II , which has strong magnetic anisotropy due to first‐order spin‐orbital coupling, 3 exhibits magnetic hysteresis and slow magnetization dynamics typical of single‐chain magnets.