Abstract

Photoinduced polymerization of Langmuir–Schaefer monolayers of four unsymmetrical hydroxyalkadiynyl N-arylcarbamate derivatives, prepared on the basis of diynes solutions with an extremely low concentration, was studied under prolonged UV irradiation. The kinetics of these diacetylene (DA) molecules films transition to the blue phase of polydiacetylenes (PDA) films, which is not characteristic of any other DA alcohol derivatives, has been studied by light absorption spectroscopy and scanning electron microscopy. The structure homogeneity of DA and PDA films was demonstrated. A continuous shift of the optical absorption band of each PDA film to the long-wavelength region of the spectrum during 60 min of UV light irradiation was found. That indicated an increase of the chains conjugation length in blue-phase PDA samples.

中文翻译：

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基于二乙炔醇衍生物的蓝相聚二乙炔薄膜中聚合物链共轭长度的光诱导增加

摘要

在长时间的紫外线照射下，研究了在极低浓度的二炔溶液的基础上制备的四种不对称羟基烷二炔基N-芳基氨基甲酸酯衍生物的Langmuir-Schaefer单分子层的光诱导聚合。这些丁二炔 (DA) 分子薄膜转变为聚丁二炔 (PDA) 薄膜蓝相的动力学，这不是任何其他 DA 醇衍生物的特征，已通过光吸收光谱和扫描电子显微镜进行了研究。证明了 DA 和 PDA 薄膜的结构均质性。在 60 分钟的紫外光照射期间，发现每个 PDA 膜的光学吸收带连续移动到光谱的长波长区域。这表明蓝相 PDA 样品中链共轭长度增加。