Dicarboxy-telechelic cooligomers with sequence structure tunable light absorption
作者:C. Kaiser、M. Behl、M. Schroeter、K. Kratz、A. Lendlein
DOI:10.1016/j.reactfunctpolym.2012.04.015
日期:2012.8
Alternating cooligomers of 5 pyrrole (P) and thiophene (T) units with a PTPTP sequence and carboxylic telechelic groups in α,α′-position are supposed to provide a low band gap and might be incorporated into degradable polymers. In this study we explored whether such new α,α′-ester linked π-conjugated alternating electron rich PTPTP cooligomers of defined size could be created following a Stille coupling
具有PTPTP序列和位于α,α'-位的羧基远螯基团的5个吡咯(P)和噻吩(T)单元的交替致冷异构体被认为可提供低带隙,并且可以掺入可降解聚合物中。在这项研究中,我们探索了是否可以通过Stille偶联合成途径来创建这种大小确定的新的α,α'-酯连接的π共轭交替富电子的PTPTP致冷低聚物。将所得的共低聚物显示在吸收光谱λ最大固态时在341 nm至379 nm之间,固态时在346 nm至410 nm之间,这可以通过用供体型烷基和烷氧基官能团的取代来调节。当引入通过去质子化或氧化的额外电荷时,可以获得吸收带到光谱的IR区域的强红移,其吸收最大值在550和650nm之间,并且进一步到850和1000nm。所制备的半导体材料可潜在地用作光声成像的染料或用于氧化监测的传感器。