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首页> 外文会议>Practical holography XXV: materials and applications >Light induced anisotropy and gyrotropy in the media on the basis of azo indicators
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Light induced anisotropy and gyrotropy in the media on the basis of azo indicators

机译：基于偶氮指示剂的光在介质中的各向异性和旋向性

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摘要

Azo indicators are well known in which when changing acidity they changes their properties. It was natural to expect also their appreciable changes of their polarization properties. The results of the carried out experimental research in recording media on the basis of azo indicators- homolog of the Methyl orange introduced into the polymeric matrix are presented in this work. According to the technology developed by us, the samples for the reception of which solvents with various degree of acidity, within values pH 1.68-12.45 have been created. Samples were irradiated by the light of argon laser (488 nm) actinic for them. Measurement of light induced anisotropy was carried out on a registering recorder and can be described by means of one parameter- the effective anisotropy. As standards the samples of dyes for the reception of which neutral solvent was used have been considered. In a number of dyes the values of effective anisotropy in alkaline and acid media exceed its values concerning corresponding standards. The higher homolog -Heptyl orange and Benzyl orange which are weak or insoluble in water, become water-soluble when using solvents both with acid and alkaline reaction. The interval of appearance of light induced anisotropy has been expanded. We have used the method of the zero-ellipsometry for the research arising in the same samples light induced gyrotropy. Values of circular dichroism and circular birefringence in investigated layers in neutral media have been calculated also at various values pH. In the work the received results are discussed and analyzed.
机译：偶氮指示剂是众所周知的，其中当改变酸度时它们会改变其性能。很自然也期望它们的极化特性发生明显变化。在偶氮指示剂的基础上，在记录介质中进行实验研究的结果介绍了引入聚合物基体中的甲基橙的同系物。根据我们开发的技术，已经创建了用于接收酸度在pH 1.68-12.45之内的各种酸度的样品。用氩光（488 nm）对其进行光化辐照。光致各向异性的测量是在套准记录仪上进行的，并且可以通过一个参数-有效各向异性来描述。作为标准，已经考虑使用中性溶剂的用于接收染料的样品。在许多染料中，在碱性和酸性介质中的有效各向异性值超过了其对应标准的值。较弱或不溶于水的高级同系物-庚基橙和苄基橙，在同时使用酸和碱反应的溶剂时变为水溶性。光引起的各向异性的出现间隔已经扩大。我们已经使用零椭圆仪的方法研究了在相同样品中产生的光致回旋现象。还已经在各种pH值下计算了在中性介质中所研究的层中的圆二色性和圆双折射的值。在工作中，对收到的结果进行了讨论和分析。

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