Dynamic heterogeneity in supercooled ortho-terphenyl studied by multidimensional deuteron NMR
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1996-10-01
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IOP Publishing
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Using deuteron NMR, we have studied molecular reorientation rates and rate exchange processes in supercooled ortho-terphenyl. We monitor the re-equilibration of differently selected subensembles through four-time stimulated echo experiments. A comparison of the two-time with the four-time echoes suggests that the characteristic time scales for reorientation and dynamical exchange are relatively similar. The four-time correlation functions were described using various multi-state rate exchange models.
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Böhmer, R.; Hinze, G.; Diezemann, G.; Geil, B.; Sillescu, H.: Dynamic heterogeneity in supercooled ortho-terphenyl studied by multidimensional deuteron NMR. In: Europhysics Letters Nr. 1, Jg. 36(1996), S. 55-60, doi: 10.1209/epl/i1996-00186-5.