1,6- and 1,7-regioisomers of dinitro- and diamino-substituted perylene bisimides: synthesis, photophysical and electrochemical properties
作者:Hsing-Yang Tsai、Che-Wei Chang、Kew-Yu Chen
DOI:10.1016/j.tetlet.2013.12.041
日期:2014.1
respectively. This is the first time 1,6-regioisomers of dinitro- and diamino-substituted perylene bisimides are obtained in pure form. The photophysical and electrochemical properties of 1,6-3 and 1,7-3 were found to be almost the same. However, the regioisomers 1,6-1 and 1,7-1 exhibit significant differences in their optical characteristics. The absorption spectrum of 1,6-1 covers a larger part of the visible
二硝基的1,6-和1,7-区域异构体(1,6- 3和1,7- 3)和二氨基-取代的二萘嵌苯双酰亚胺(1,6- 1和1,7- 1)的合成。区域异构体1,6- 3和1,7- 3通过高效液相色谱法成功地分离和表征由500兆赫1 H NMR光谱。随后,1,6-还原3和1,7- 3,得到相应的diaminoperylene 1,6-双酰亚胺1和1,7- 1, 分别。这是首次以纯净形式获得二硝基和二氨基取代的per双酰亚胺的1,6-区域异构体。的1,6-光物理和电化学性能3和1,7- 3被认为是几乎相同的。然而,区域异构体1,6- 1和1,7- 1种表现出在它们的光学特性显著差异。的1,6-吸收光谱1盖相比的1,7-可见光区域的较大部分1。一旦激发,1,6- 1还显示大偶极矩的变化比的1,7- 1。为了使它们的电子结构和吸收光谱合理化,报道了这些染料的随时间变化的密度泛函理论计算。