coupling approach. Optical properties such as quantum yields and absorption/emission spectra of the fluorophores were investigated by UV/Vis and fluorescence measurements. Aggregation induced excimer formation of the chromophores in polar solvents and in the solid state was proved by the presence of a characteristic bathochromically shifted emission band and a decrease of the emission capability. These
通过直接的Sonogashira偶联方法制备了新颖的烷氧基改性的2,7-二叔丁基-4,5,9,10-四(芳基
乙炔基)py。通过UV / Vis和荧光测量研究了荧光团的光学性质,例如量子产率和吸收/发射光谱。通过存在特征性的红移的发射带和发射能力的降低,证明了在极性溶剂中和在固态下发色团的聚集诱导的准分子形成。这些结果有力地表明意外地观察到,相邻的
芘环的受激准分子的形成不会被引入体积大的防止叔-丁基取代基。单晶X射线和计算分析揭示了molecules分子多聚
芳烃的分子堆积中相邻分子的共面排列以及π-π堆积的存在。此外,荧光,
DSC和POM测量表明,聚集行为,热特性和结晶特性会受到changing核外围附着的官能团结构变化的显着影响。