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Magneto-structural correlations in oxalate-bridged Sr(II)Cr(III) coordination polymers: structure, magnetization, X-band, and high-field ESR studies

Androš Dubraja, Lidija; Jurić, Marijana; Popović, Jasminka; Pajić, Damir; Krupskaya, Yulia; Kataev, Vladislav; Bűchner, Bernd; Žilić, Dijana (2018) Magneto-structural correlations in oxalate-bridged Sr(II)Cr(III) coordination polymers: structure, magnetization, X-band, and high-field ESR studies. Dalton Transactions, 47 (11). pp. 3992-4000. ISSN 1477-9226

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Abstract

The results of high-field electron spin resonance (HF-ESR) spectroscopy on the title 1D coordination polymers at frequencies up to 415 GHz, supported by X-ray diffraction, thermal, magnetic susceptibility, and X-band (10 GHz) ESR studies, are presented. The heterometallic compounds {;SrCr2(phen)2(C2O4)4};·H2O (SrCrPhen) and {;SrCr2(bpy)2(C2O4)4(H2O)};·5H2O (SrCrBpy) (phen = 1, 10-phenanthroline, bpy = 2, 2′-bipyridine) were synthesized. Structural analysis revealed double oxalate-bridged zigzag Sr–Cr chains while magnetic susceptibility studies showed paramagnetic behaviour of the complexes. HF-ESR spectroscopy data were analysed with a relevant spin-Hamiltonian, yielding the g, D and E parameters of the Cr(III) ions. Both complexes showed small magnetic easy-axis type anisotropy with |D| ∼ 1 K ; SrCrBpy has uniaxial anisotropy while SrCrPhen has biaxial anisotropy. HF-ESR studies have enabled us to establish rational magneto-structural correlations and revealed significant differences between very similar crystal structures. Additionally, the ability of SrCrPhen and SrCrBpy to be single-source precursors for the formation of Sr–Cr oxides was investigated.

Item Type: Article
Uncontrolled Keywords: High field ESR ; Magnetic anisotropy ; Zero-field splitting
Subjects: NATURAL SCIENCES > Physics
NATURAL SCIENCES > Chemistry
Divisions: Division of Materials Chemistry
Division of Materials Physics
Division of Physical Chemistry
Projects:
Project titleProject leaderProject codeProject type
Multiferični i magnetoelektrični sustavi-FerMaElDamir PajićUIP-2014-09-8276HRZZ
Istraživanje molekulskih magneta (polinuklearnih kompleksa prijelaznih metala) HF-EPR spektroskopijom -Dijana ŽilićPD-02.03/164HRZZ
Temeljni problemi renesansnog novoplatonizma i hrvatski renesansni filozofi-Erna Banić-Pajnić191-1911112-1108MZOS
Novi metal-organsi sustavi s oksalatnim i kinoidnim ligandima s podešenim svojstvima pogodnim za primjenu-NMOSBOQLWTPSFPKrešimir MolčanovIP-2014-09-4079HRZZ
Depositing User: Dijana Žilić
Date Deposited: 22 Mar 2018 10:37
Last Modified: 22 Mar 2018 10:37
URI: http://fulir.irb.hr/id/eprint/4002
DOI: 10.1039/C7DT04655C

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