Synthesis and optoelectronic properties of phenylenevinylenequinoline macromolecules
作者:Reyes Flores-Noria、Rosa Vázquez、Eduardo Arias、Ivana Moggio、Marlene Rodríguez、Ronald F. Ziolo、Oliverio Rodríguez、Dean R. Evans、Carl Liebig
DOI:10.1039/c3nj01193c
日期:——
A series of 3, 5 and 7 quinoline terminated arylenevinylene oligomers was selectively synthesized by applying two repetitive reactions at each cycle of oligomerization: a Wittig and Pd Heck cross-coupling. Oligomers were characterized by 1H and homo-J-resolved, DEPT-135, APT, 13C NMR and MALDI-TOF spectrometry. A detailed characterization of the oligomers was performed by UV-Vis, static-dynamic fluorescence
通过在低聚的每个循环中进行两个重复反应:Wittig和Pd Heck交叉偶联,选择性地合成了一系列3、5和7喹啉封端的亚芳基亚乙烯基低聚物。低聚物的特征在于1 H和均一J分辨的DEPT-135,APT,131 H NMR和MALDI-TOF光谱。通过UV-Vis,静态动态荧光和Z-扫描光谱对寡聚物进行详细的表征。用循环伏安法测定HOMO和LUMO水平,并与理论值进行比较。五聚体可实现有效的共轭,而七聚体的分子结构显示出亚苯基亚乙烯基片段的明显扭转,破坏了共轭程度,这是通过低聚物几何结构的理论模拟得出的。此外,理论模拟表明,HOMO-LUMO前沿轨道主要位于亚苯基亚乙烯基结构中,而在喹啉中,空间分布仅位于C处。N-基团,而相邻的苯基基团没有任何明显贡献。五聚体是最荧光低聚物具有在溶液中的量子产率φ = 0.62-0.68取决于溶剂和1.07-1.28纳秒的荧光寿命,使该低聚物适合用于光电器件。