Distyrylbenzene-based segmented conjugated polymers: Synthesis, thin film morphology and chemosensing of hydrophobic and hydrophilic nitroaromatics in aqueous media
作者:Marcela F. Almassio、Maria J. Romagnoli、Pablo G. Del Rosso、Ana Belén Schvval、Raúl O. Garay
DOI:10.1016/j.polymer.2017.02.069
日期:2017.3
Two new segmented conjugated polymers bearing distyrylbenzene chromophoric units and their model compounds were synthesized. The tendency of the model compounds to form H- and J-type aggregates in the amorphous matrix was greatly diminished by the twisted polymeric architecture. Fluorescence anisotropy measurements indicated good exciton mobilities in condensed phase. Fluorescence quenching by nitroaromatic
合成了两个带有二苯乙烯基苯发色单元的新型分段共轭聚合物及其模型化合物。扭曲的聚合物结构大大降低了模型化合物在无定形基质中形成H型和J型聚集体的趋势。荧光各向异性测量表明在凝聚相中具有良好的激子迁移率。硝基芳族水溶液的荧光猝灭作用快速,完全,选择性和可逆,表明分析物迅速扩散到薄膜中。对硝基酚的猝灭反应优于对硝基甲苯的猝灭反应。二乙氧基取代取代给电子体的能力增加对无定形形态是有害的,并且不增加对NAC的敏感性。当使用MeOH代替水时,聚合物的淬灭效率没有改变。溶解度参数距离,[R一。表示传感材料与分析物的亲和力较低时,其显示较高的响应。该观察结果可有助于荧光传感器的设计。