Joint Research Group of Electron Paramagnetic Resonance

The joint group consists of the EPR Division of the Regional Laboratory and the Research Group of Catalysis and Solid State Chemistry I of the Faculty of Chemistry, Jagiellonian University.

Research topics:

• valence and coordination states of transition metal ions in the bulk and on the surface of oxides, zeolites and polymer catalysts
• structure and reactivity of intermediate species formed upon interaction of a catalyst with reactant molecules
• development of isotopically labelled probe molecules for structural investigations
• studies of the mechanism of surface reactions
• elaboration of EPR standards for quantitative measurements

Research equipment:

• EPR spectrometer ELEXSYS E-500-10/12 (Bruker) with a Unix workstation
• Variable temperature unit (77-420 K)
• UV-source for in situ irradiation (BUV-1) and goniometer
• Magnetometer
• Frequency-meter
• Computer programs for data acquisition, processing and spectra simulation.

International collaboration:

• Université Pierre et Marie Curie (Prof. M. Che), 4 Place Jussieu, 75-252 Paris, France;
• Universita di Torino, Istituto di Chimica Fisica, Facolta di Scienze (Prof. E. Giamello), Corso M. d'Azeglio 48, 10125 Torino, Italy;
• Leipziger Universität, Sektion Chemie (Prof. G. Wendt), Talstrasse 35, Leipzig 7010, Germany;
• University of Detroit, Dept. of Chemistry (Prof. Sh. Schlick), 4001 W. McNichols Road, Detroit, Michigan 48221-9987, USA.

Contact:

Selected publications:

• K. Dyrek, A. Rokosz, A. Madej, E. Bidzinska, Quantitative EPR Studies of Transition Metal Ions in Oxide, Aluminosilicate and Polymer Matrices, Applied Magnetic Resonance, 10, 1996, 319.
• K. Dyrek, M. Che, EPR as a Tool to Investigate Transition Metal Chemistry on Oxide Surfaces, Chem. Rev., 97, 1997, 305.
• K. Dyrek, A. Adamski, Z. Sojka, EPR Study of the Mobility of Paramagnetic Species on the Surface and in the Bulk of Solids, Spectrochimica Acta Part A, 54, 1998, 2237.
• K. Dyrek, M. Labanowska, H. Rembertowicz, E. Bidzinska, Electron Paramagnetic Resonance Study of V₂O₅ Deactivation in the Course of Catalytic Oxidation of SO₂ to SO₃, Spectrochimica Acta A, 56, 2000, 309.
• J. Babinska, K. Dyrek, Z. Sojka, P. Wyszomirski, W. Zabinski, Generation of Paramagnetic Centers in Kaolinites by Thermally Activated Neutrons, Mineralogia Polonica, 31, 2000, 27.

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