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Synthesis of azodyes and polyurethanes for use as nonlinear optical materials.

机译：偶氮染料和聚氨酯的合成，用作非线性光学材料。

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摘要

Benzothiazoles are well known for their use in high temperature applications, in particular thermally stable polymers. Here, novel difunctional nonlinear optical azobenzothiazole compounds with exceptional thermal stability have been synthesized for incorporation into cross-linked polymeric systems. A viable separation technique and thermal degradation profile has been established for the isomers (5'-nitro-6'-hydroxy-benzothiazoleazo)-[2-(N-ethyl-N-hydroxyethyl)]-aniline and (7'-nitro-6'-hydroxy-benzothiazoleazo)-[2-(N-ethyl-N-hydroxyethyl)]-aniline. The nonlinear optical response of the cross-linked polymers containing these azodyes will be studied with second-harmonic generation measurements in the future. A further objective of the research was to determine the optimum distance between nonlinear optical chromophores to maximize poling. For this study (2'methyl-4'-nitrophenylazo)-[N,N-bis(2-hydroxyethyl)]-aniline was synthesized and incorporated into side-chain polymeric systems with diisocyanate spacer groups that impart different local environments around the chromophore. The nonlinear optical response of these polymers have been studied with second-harmonic generation to identify the spacer or spacers that will provide the optimum separation and/or conformation between chromophores allowing poling efficiency to be maximized. The findings suggest that the more flexible the system the more efficient the poling process. Findings concerning the positive, negative, and specifics of the project and implications for future work are discussed.
机译：苯并噻唑以其在高温应用中的用途而众所周知，特别是热稳定的聚合物。在这里，已经合成了具有优异热稳定性的新型双官能非线性光学偶氮苯并噻唑化合物，用于掺入交联的聚合物体系中。已建立了异构体（5'-硝基-6'-羟基-苯并噻唑唑）-[2-（N-乙基-N-羟基乙基）]-苯胺和（7'-硝基-苯甲基）的可行分离技术和热降解特性6'-羟基-苯并噻唑唑）-[2-（N-乙基-N-羟乙基）]-苯胺。将来，将通过二次谐波产生测量研究包含这些偶氮染料的交联聚合物的非线性光学响应。该研究的另一个目的是确定非线性光学发色团之间的最佳距离，以最大化极化。对于本研究，合成了（2'甲基-4'-硝基苯基偶氮）-[N，N-双（2-羟乙基）]-苯胺，并将其结合到带有二异氰酸酯间隔基的侧链聚合物体系中，从而赋予发色团周围不同的局部环境。已经对这些聚合物的非线性光学响应进行了二次谐波研究，以鉴定一种或多种间隔基，这些间隔基将在生色团之间提供最佳的分离和/或构象，从而使极化效率最大化。研究结果表明，系统越灵活，轮询过程越有效。讨论了有关项目的积极，消极和特殊性的发现以及对未来工作的影响。

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  • 作者

    Hill, Isiah Jaasper, Jr.;

  • 作者单位

    Georgia Institute of Technology.;

  • 授予单位 Georgia Institute of Technology.;
  • 学科 Chemistry Organic.
  • 学位 Ph.D.
  • 年度 1998
  • 页码 80 p.
  • 总页数 80
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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