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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >How does the urea dynamics differ from water dynamics inside the reverse micelle?
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How does the urea dynamics differ from water dynamics inside the reverse micelle?

机译：尿素动力学与反胶束内部的水动力学有何不同？

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摘要

In this study, the urea dynamics inside AOT reverse micelle (RM) has been monitored without intervention of water using time-resolved fluorescence techniques from the picosecond to nanosecond time regime. It has been observed that urea dynamics inside the reverse micelle is severely retarded compared to water RM due to the formation of highly networked urea cluster inside the RM. Time-resolved fluorescence anisotropy study also confirms the existence of a confined environment around the dye at higher concentrations of urea inside the reverse micelle. The dynamics of urea-water mixtures inside AOT reverse micelle has also been monitored with increasing urea concentration to get insight about the effect of urea on the overall solvation dynamics feature. It has been observed that with the increase in urea concentration, the overall dynamics becomes slower, and it infers the presence of few water or urea molecules, those strongly associated with surrounding urea and (or) water by hydrogen bonds.
机译：在这项研究中，使用皮秒至纳秒时间范围内的时间分辨荧光技术，无需用水干预即可监测AOT反胶束（RM）内部的尿素动力学。已经观察到，由于在RM内形成高度网络化的尿素簇，与水RM相比，反胶束内部的尿素动力学受到严重阻碍。时间分辨荧光各向异性研究还证实了反胶束内部较高浓度尿素下染料周围存在密闭环境。还已经通过增加尿素浓度监测AOT反胶束内部尿素-水混合物的动力学，以了解尿素对整体溶剂化动力学特征的影响。已经观察到，随着尿素浓度的增加，整体动力学变慢，并且推断存在少量水或尿素分子的存在，那些水或尿素分子通过氢键与周围的尿素和（或）水紧密结合。

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