Institute of Organic Chemistry and Macromolecular Chemistry, Heinrich Heine University Düsseldorf, Universitätsstraße 1, D-40225, Düsseldorf, Germany.
Macromol Rapid Commun. 2018 Aug;39(15):e1800277. doi: 10.1002/marc.201800277. Epub 2018 Jun 20.
Polymerizable merocyanine and cyanine dye monomers are synthesized and applied in a statistical copolymerization with methylmethacrylate, giving a series of highly fluorescent poly(methyl methacrylate) (PMMA) copolymers. Photophysical properties of yellow to red merocyanine- and of pink to dark purple cyanine-containing copolymers are studied by fluorescence spectroscopy in solid state as well as in different solvents. The highest quantum yield measured in the solid state is observed for copolymers with the lowest dye content: 16% for merocyanine-based and 13% for cyanine-based copolymers, respectively. Fluorescence properties in solution show positive solvatochromism for both merocyanine monomer and copolymer. Copolymer, in comparison to monomer, is hypsochromically shifted to lower wavelengths which point toward H-aggregation of the chromophores in the copolymer matrix.
合成了可聚合的甲川和菁染料单体，并将其与甲基丙烯酸甲酯进行统计共聚，得到了一系列具有高荧光性的聚甲基丙烯酸甲酯（PMMA）共聚物。通过荧光光谱法研究了黄色到红色的甲川和粉色到深紫色的菁染料共聚物在固态以及不同溶剂中的光物理性质。在固态下测量到的最高量子产率出现在染料含量最低的共聚物中：基于甲川的共聚物为 16%，基于菁的共聚物为 13%。在溶液中的荧光性质对于甲川单体和共聚物都表现出正的溶剂化变色效应。与单体相比，共聚物的荧光波长发生蓝移，这表明在共聚物基质中发色团发生了 H-聚集。
