Effect of Aryl-, Halogen-, and Ms-Aza-Substitution on the Luminescent Properties and Photostability of Difluoroborates of 2,2′-Dipyrrometenes
作者:Anna Yu. Kritskaya、Mikhail B. Berezin、Elena V. Antina、Anatoly I. Vyugin
DOI:10.1007/s10895-019-02403-2
日期:2019.7
to 5–20%. The stability of 2,2′-dipyrromethenes difluoroborates to oxidative destruction under the influence of UV irradiation in cyclohexane solutions was evaluated. It has been shown that symmetric aryl substitution in pyrrole cycles of dipyrromethene significantly increases the photostability of the corresponding compounds as compared to alkyl-substituted analogs and is an effective method of obtaining
合成了具有烷基,苯基和卤素取代的2,2'-二吡咯烷酮(BODIPY)和内消旋氮杂双吡咯烷酮(ms-aza-BODIPY)的硼(III)配合物。分析了所获得的配位化合物与其发光特性的结构关系。与烷基取代的类似物相比,丙烯酸化的BODIPY对与溶剂的粒子间相互作用更敏感,从而导致量子产率最多降低40%。在BODIPY分子中引入苯基取代基会使第一个吸收带发生红移,显着(32-37 nm)增加了发射光谱的斯托克斯位移,但降低了S 0 →S 1的可能性与烷基化配合物相比,电子跃迁。与BODIPY相比,用氮取代次甲基碳原子会导致ms-aza-BODIPY荧光猝灭,最高可达5-20%。评价了2,2'-吡咯并蒽二氟硼酸盐在环己烷溶液中的紫外线照射下对氧化破坏的稳定性。已经显示,与烷基取代的类似物相比,在二吡咯亚甲基的吡咯循环中的对称芳基取代显着增加了相应化合物的光稳定性,并且是获得具有实际有用性能的