engleski

Electron paramagnetic resonance spectroscopy in material science

Electron paramagnetic or spin resonance (EPR/ESR) is a spectroscopic technique that gives insight into local properties of paramagnetic centres and microscopic picture of interactions. However, for investigation of systems with spin S > 1/2 , it is often necessary to perform non-commercial EPR spectroscopy, that uses high frequencies (higher than 100 GHz) and high magnetic fields (~ 10 T) (high-field/high-frequency EPR, HF-EPR). Here, X-band (microwave frequency around 10 GHz) as well as HF-EPR studies of few transition metal complexes (Cu2+, Cr3+, Mn2+...) are presented [1-5]. Experimentally obtained EPR spectra are simulated and analyzed using EasySpin [6], a computational package based on a commercial technical computation software Matlab. For theorethical description of investigated spin systems, spin-Hamiltonian approach are used. As a conclusion, magneto-structural correlation in the investigated complexes will be discussed. References: [1] E. Garribba and G. Micera, J. Chem. Edu. 83 (2006) 1229-1232. [2] N. Novosel, D. Žilić, D. Pajić, M. Jurić, B. Perić, K. Zadro, B. Rakvin, P. Planinić, Solid State Sci. 10 (2008) 1387-1394. [3] D. Žilić, L. Androš, Lidija, Y. Krupskaya, V. Kataeva and B. Büchner, Appl. Magn. Reson. 46 (2015) 309-321. [4] M. Jurić, K. Molčanov, D. Žilić, B. Kojić-Prodić, RSC Advances 6 (2016) 62785-62796. [5] D. Žilić, K. Molčanov, M. Jurić, J. Habjanič, B. Rakvin, Y. Krupskaya, V. Kataev, S. Wurmehl, B. Büchner, Polyhedron 126 (2017) 120-126. [6] S. Stoll and A. Schweiger, J. Magn. Reson. 178 (2006) 42–55.

EPR/ESR ; transition metal complexes ; simulation ; spin-Hamiltonian

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