Cyclophanes of Perylene Tetracarboxylic Diimide with Different Substituents at Bay Positions
作者:Junqian Feng、Yuexing Zhang、Chuntao Zhao、Renjie Li、Wei Xu、Xiyou Li、Jianzhuang Jiang
DOI:10.1002/chem.200800136
日期:2008.8.8
Cyclophanes of perylene tetracarboxylic diimides (PDIs) with different substituents at the bay positions, namely four phenoxy groups at the 1,7-positions (1), four piperidinyl groups at the 1,7-positions (2), and eight phenoxy groups at the 1,6,7,12-positions (3) of the two PDI rings, have been synthesized by the condensation of perylene dianhydride with amine in a dilute solution. These novel cyclophanes
the位置具有不同取代基的per四羧酸二酰亚胺(PDI)的环戊烷,即在1,7位(1)具有四个苯氧基,在1,7位(2)具有四个哌啶基和在1,7位具有四个苯氧基通过在稀溶液中of二酐与胺的缩合反应合成了两个PDI环的1,6,7,12-位(3)。这些新颖的环烷通过(1)NMR光谱,MALDI-TOF质谱,电子吸收光谱和元素分析来表征。通过制备性TLC成功分离了在1,7位(2a和2b)被四个哌啶基取代的环烷的构象异构体。与它们的单体对应物相比,环烷的主吸收带显着转移到了较高的能量侧,这表明环烷中PDI单元之间存在显着的pi-pi相互作用。然而,发现环烷的电子吸收光谱和荧光光谱都随着PDI环的海湾位置处的侧基的数目和性质而变化。对构象异构体2a和2b的随时间变化的DFT计算很好地再现了它们的实验电子吸收光谱。电化学研究表明,与相应的单体对应物相比,环烷中PDI环的首次氧化和还原电势显着增加,这与