Dynamic heterogeneity in supercooled ortho-terphenyl studied by multidimensional deuteron NMR
Dynamic heterogeneity in supercooled ortho-terphenyl studied by multidimensional deuteron NMR
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DOI：
10.1209/epl/i1996-00186-5
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发表时间：
1996-10-01
期刊：
影响因子：
--
通讯作者：
Sillescu, H
中科院分区：
文献类型：
--
作者：
Bohmer, R;Hinze, G;Sillescu, H
用氘核磁共振研究了过冷邻三联苯分子的重取向速率和速率交换过程。我们通过四次受激回波实验监测不同选择的子系综的再平衡。两次与四次回波的比较表明，重定向和动力交换的特征时间尺度是比较相似的。利用多种多状态汇率模型描述了四次相关函数。
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.