作者:Parantap Sarkar、Fabien Durola、Harald Bock
DOI:10.1039/c3cc44044c
日期:——
Twofold Perkin condensation of 2,5-dibromophenylene-1,4-diacetic acid with arylglyoxylic acids followed by cyclo-dehydrobromination leads to dipyreno- and diperyleno-anthracene tetraesters and diimides. The imides show surprisingly large absorption shifts versus the esters, illustrating that electron-withdrawing substituents at the anthracene unit efficiently impart long wavelength absorption in such electron-deficient graphene nanoribbon fragments.
2,5-二溴苯并苯甲酸-1,4-二甲酸与芳基甘油酸的两步佩尔金缩合反应,随后进行环状脱溴化反应,生成了二吡咯并和二萘并蒽的四酯和二酰亚胺。这些酰亚胺与酯相比显示出意外的大吸收波长偏移,表明在蒽单元上的电子吸引取代基有效地赋予了该类电子缺乏的石墨烯纳米带片段较长的波长吸收。