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首页> 外文会议>Photonics, devices, and systems V >Photoluminescence Properties of Polynaphthalisoimides and Polynapththalimides in Solutions and Thin Layers
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Photoluminescence Properties of Polynaphthalisoimides and Polynapththalimides in Solutions and Thin Layers

机译：溶液和薄层中聚萘二甲酰亚胺和聚萘甲酰亚胺的光致发光特性

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摘要

A series of polynaphthalsoimides and polynaphthalimides from 1,4,5,8-naphthalene dianhydride and 4,4'-methylene-bis(2,6-diisopropylaniline) or its hydrochloride in HMPA were synthesized in one-step high temperature polycondensation process. The different temperatures of the reaction from 125℃ to 180℃ were applied. The products were investigated using PL techniques in both solutions and thin layers. The observed changes in all investigated spectra and photochemical properties were presented. The remarkable changes in emission wavelength in photoluminescence was observed together with the increase of the reaction temperature. This work presents novel approach to the class of polymers well known to literature worldwide trying to explain of some surprising aspects of photoluminescence of these compounds. When investigated in solution, the polymer synthesized at 125℃ exhibit almost no photoluminescence. The increase of the temperature to 150℃ causes the strong increase in the photoluminescence intensity at 545 nm. When the reaction temperature increase to 180℃ the intensity of photoluminescence exhibits moderate increase at 546.5 nm, however, remarkable increase was observed for 476.5 nm and 440 nm. The photoluminescence analysis of the polymers synthesized shows that depending on reaction temperature products emitting at different wavelengths may be obtained. Investigations were repeated for thin layers of the polymers. The obtained results and their comparison with the results in solution were also presented and discussed.
机译：通过一步一步高温缩聚反应，在HMPA中合成了由1,4,5,8-萘二酐和4,4'-亚甲基-双（2,6-二异丙基苯胺）或其盐酸盐组成的一系列聚萘二甲酰亚胺和聚萘二甲酰亚胺。反应温度从125℃到180℃不等。使用PL技术在溶液和薄层中对产品进行了研究。提出了所有研究的光谱和光化学性质的观察到的变化。观察到光致发光中发射波长的显着变化以及反应温度的升高。这项工作提出了一种新颖的方法，用于解决世界范围内众所周知的聚合物类别，试图解释这些化合物的光致发光的一些令人惊讶的方面。当在溶液中研究时，在125℃下合成的聚合物几乎没有光致发光。温度升高到150℃导致545 nm处的光致发光强度大大增加。当反应温度升至180℃时，光致发光强度在546.5 nm处适度增加，但是，在476.5 nm和440 nm处观察到显着的增加。合成聚合物的光致发光分析表明，取决于反应温度，可以获得以不同波长发射的产物。重复了对聚合物薄层的研究。还介绍和讨论了获得的结果以及它们与解决方案中的结果的比较。

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