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[Ni(bpy)(ox)]: a candidate in the class of Haldane gap systems (bpy = 2,2′-bipyridine, ox = oxalate)

AuthorsČernák, Juraj; Farkašová, Nela; Tomás, Milagros ; Kavečanský, V.; Čižmár, E.; Orendáč, Martin
KeywordsHaldane gap
Rietveld method
Quantum spin chain
Excitation spectrum
Chain structure
Issue Date2015
PublisherTaylor & Francis
CitationJournal of Coordination Chemistry 68(16): 2788-2797 (2015)
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.
Identifiersdoi: 10.1080/00958972.2015.1058485
e-issn: 1029-0389
issn: 0095-8972
Appears in Collections:(ISQCH) Artículos
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