Abstract
[Ni(bpy)(ox)] (bpy = 2,2ʹ-bipyridine; ox = oxalate) was solvothermally prepared in the microcrystalline form and identified by chemical analyses and IR spectroscopy. X-ray powder diffractometry indicates its isostructural character with analogous complexes [M(bpy)(ox)], and thus, its chain-like crystal structure formed of {Ni(bpy)} building units linked by bridging oxalate anions coordinated in a bis(chelate) fashion. The temperature dependence of the magnetic susceptibility and the field dependence of the magnetization reveal that the studied compound belongs to the class of systems with a Haldane gap. The estimated magnitude of the gap Eg ≈ 13.4 cm−1 is comparable with those found in archetypal Haldane gap systems.
Graphical abstract
Acknowledgment
NF thanks National Scholarship Programme of the Slovak Republic for financial support of her research stay at the University of Zaragoza (Spain).
Disclosure statement
No potential conflict of interest was reported by the authors.