Synthesis and Spectroscopic Investigation of a Series of Push–Pull Boron Dipyrromethenes (BODIPYs)
作者:Sunting Xuan、Ning Zhao、Xiangyi Ke、Zehua Zhou、Frank R. Fronczek、Karl M. Kadish、Kevin M. Smith、M. Graça H. Vicente
DOI:10.1021/acs.joc.6b02941
日期:2017.3.3
A series of push–pull BODIPYs bearing multiple electron-donating and electron-acceptor groups were synthesized regioselectively from 2,3,5,6,8-pentachloro-BODIPY, and characterized by NMR spectroscopy, HRMS, and X-ray crystallography. The influence of the push–pull substituents on the spectroscopic and electrochemical properties of BODIPYs was investigated. Bathochromic shifts were observed for both
以2,3,5,6,8-五氯-BODIPY为原料,区域选择性地合成了一系列带有多个给电子基团和受电子基团的推拉BODIPY,并通过NMR光谱、HRMS和X射线晶体学进行了表征。研究了推拉取代基对 BODIPY 光谱和电化学性质的影响。引入推拉部分后,在不同溶剂中观察到吸光度(高达 37 nm)和发射(高达 60 nm)的红移。DFT 计算与光谱和循环伏安研究一致,表明安装推拉部分后 HOMO-LUMO 能隙减小。在 2 和 6 位上带有噻吩基的BODIPY 7在吸收 (635–653 nm) 和发射 (706–707 nm) 方面表现出最大的 λ max,但荧光量子产率也最低。所有 BODIPY 在黑暗中均无毒 (IC 50 > 200 μM),并对人 HEp2 细胞显示出低光毒性 (IC 50 > 100 μM,1.5 J/cm 2 )。尽管荧光量子产率相对较低,但推拉式 BODIPYS