donor-substituted phenyleneethynylene molecules with up to three 1,4-phenylene and two acetylenic units were synthesized by Suzuki–Miyaura and Sonogashira cross-coupling reactions and further studied by absorption and emission spectra and theoretical calculations. The π-system between the N,N-dimethylamino group and terminal acetylene was systematically elongated which allowed elucidation of the fundamental structure–property
Suzuki-Miyaura和Sonogashira交叉偶联反应合成了七个具有多达三个1,4-亚苯基和两个炔属单元的模型供体取代的亚苯基亚
乙炔基分子,并通过吸收和发射光谱及理论计算进行了进一步研究。N,N-二甲基
氨基基团与末端
乙炔之间的π系统被系统地拉长,从而阐明了基本的结构与性质之间的关系。分子长度和生色团平面度等结构性因素对观察到的光谱行为至关重要。