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首页> 外文期刊>The Journal of Chemical Physics >Photoinduced molecular reorientation dynamics in confined domains of Langmuir monolayers - art. no. 244722
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Photoinduced molecular reorientation dynamics in confined domains of Langmuir monolayers - art. no. 244722

机译：在Langmuir单层膜的受限区域中的光诱导分子重新定向动力学-艺术。没有。 244722

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摘要

In a photoresponsive Langmuir monolayer comprised of smectic-C-like domains of mesogenic trans-azobenzene derivative embedded within an isotropic matrix of its cis isomer counterpart, several structurally differing circular droplets were irradiated with linearly polarized light. This report describes the structural rearrangements that occurred in these droplets upon illumination followed by Brewster angle microscopy analysis. Starting from initial well-characterized and symmetric states, final photoaligned situations were reached in which the azimuth angles of the rod-shaped elongated molecules were found to be perpendicular to the electric component of the excitation light. The dynamical aspects of the photoalignments, including their transient patterns, are captured by a theoretical model that couples a relaxational principle incorporating long-range elastic forces with a kinetic formalism presenting an anisotropic rate law. (c) 2005 American Institute of Physics.
机译：在由嵌在其顺式异构体对应物的各向同性基质内的介晶反式偶氮苯衍生物的近晶C类结构域组成的光响应Langmuir单层中，用线性偏振光照射几个结构上不同的圆形液滴。该报告描述了在照明后通过布鲁斯特角显微镜分析在这些液滴中发生的结构重排。从良好表征的初始状态和对称状态开始，达到最终的光对准状态，其中发现杆状细长分子的方位角垂直于激发光的电子分量。光对准的动力学方面，包括其瞬态模式，是由一个理论模型捕获的，该模型将包含长距离弹性力的松弛原理与呈现各向异性速率定律的动力学形式相结合。 （c）2005年美国物理研究所。

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