engleski

Low temperature electron-spin relaxation in molecular solid exhibiting frozen-in disorder

In the multidisciplinary quest for understanding of glasses, the study of molecular glasses provides an adequate experimental framework to investigate dynamics in states characterized by frozen-in disorder. The advantage of applying electron paramagnetic resonance (EPR) spectroscopy is in the sensitivity of the electron-spin coupling with the disorder modes in the observed system. Since radiation chemistry of saccharides has been developed for numerous reasons, radiation-induced defects in sugar compounds are well described for number of sugar species. Therefore, we made use of such paramagnetic defects to study the coupling of the electron spin with the excitations of the lattice exhibiting glassy state. The results of continuous-wave and pulsed X-band EPR measurements (electron spin-lattice relaxation time) are to be presented along with the theoretical analysis in the context of extracting the contribution of disorder modes from the experimental data.

trehalose ; relaxation ; EPR

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