Abstract

The conditions to prepare luminescent acrylate polymers containing the organic dyad, molecule of which combines two different emitting fragments, hydroxyl-substituted 2,4,5–triarylimidazole and 8-azomethine-7-hydroxycoumarine moieties, via photocuring have been optimized. The effect of the nature of the photocured network acrylate polymers on luminescent properties of the dyad has been investigated. The prepared aliphatic network polymers have exhibited independent fluorescence of both molecule fragments, dependent on the excitation wavelength. At the same time, the aromatic network polymers and the aliphatic network polymers containing ether links have revealed only the imidazole fragment fluorescence. The fluorescence nature has been stronger dependent on the polymer repeat unit structure and the content of the aromatic fragments in the polymer matrix than on the presence of the hydroxyl groups in the polymer. It has been shown that the emission of the imidazole fragment of the dyad in the aliphatic network polymers depends on the internode distance and conditional polarity of the medium.

中文翻译：

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光固化网络丙烯酸酯聚合物中含咪唑和香豆素片段的多重发光特性

摘要

通过光固化制备含有有机二元体的发光丙烯酸酯聚合物的条件已经得到优化，该有机二元体的分子结合了两种不同的发光片段：羟基取代的2,4,5-三芳基咪唑和8-偶氮甲碱-7-羟基香豆素部分。研究了光固化网络丙烯酸酯聚合物的性质对二元体发光性能的影响。所制备的脂肪族网络聚合物表现出两种分子片段的独立荧光，这取决于激发波长。同时，含有醚键的芳香族网络聚合物和脂肪族网络聚合物仅显示出咪唑片段荧光。与聚合物中羟基的存在相比，荧光性质更强地依赖于聚合物重复单元结构和聚合物基质中芳香族片段的含量。已经表明，脂肪族网络聚合物中二元组的咪唑片段的发射取决于介质的节间距离和条件极性。