Naslov
X-BAND EPR STUDY ON A NEW HETEROMETALLIC (Ni2+ AND Cr3+) COMPLEX

Autori
Žilić, Dijana ; Rakvin, Boris ; Jurić, Marijana ; Planinić, Pavica

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstracts-3rd International Symposium on Molecular Materials / - Toulouse, 2008, P-167

Skup
3rd International Symposium on Molecular Materials-MOLMAT 2008

Mjesto i datum
Toulouse, Francuska, 08.07.2008. - 11.07.2008

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Ni2+; Cr3+; EPR

Sažetak
A new heterometallic complex [Ni(bpy)3]2[Cr(C2O4)3]NO3&#8729; 10H2O, where bpy stands for 2, 2'-bipyridine, has been synthesized. The compound crystallizes in the monoclinic P21/c space group with a = 23.201(5), b = 13.562(5), c = 22.350(5) angstrems, betta = 87.218(5) degrees and Z = 4. A powder sample and a single crystal of the new compound have been studied by electron paramagnetic resonance (EPR) at the microwave frequency f = 9.6 GHz, at room temperature. The crystal was rotated round three arbitrary, mutually perpendicular axes and EPR spectra were recorded. In the complex investigated, two paramagnetic species are present: Ni2+ with the spin S = 1 and Cr3+ with S = 3/2. In the frequency range examined, at room temperature, Ni2+ has been EPR silent and only the transition -1/2<->1/2 for Cr3+ has been observed. By using Bruker XSophe software, a powder simulation has been obtained and from the single-crystal measurements, with the spin-Hamiltonian approach, the following parameters for Cr3+ have been deduced: g = 1.975 +/- 0.002, D = (0.80 +/-0.05) cm-1, E = (-0.028 +/- 0.002) cm-1 and rho = (9.5 +/- 0.5) degrees (rho is the angle between the magnetic z axis and the crystallographic b axis). Temperature dependence measurements (300-4 K) are in progress.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija

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