Searching for Models Exhibiting High Circularly Polarized Luminescence: Electroactive Inherently Chiral Oligothiophenes
作者:Tiziana Benincori、Giulio Appoloni、Patricia Romana Mussini、Serena Arnaboldi、Roberto Cirilli、Elsa Quartapelle Procopio、Monica Panigati、Sergio Abbate、Giuseppe Mazzeo、Giovanna Longhi
DOI:10.1002/chem.201801158
日期:2018.8.1
Two new inherently chiral oligothiophenes characterized by the atropisomeric 3,3′‐bithianaphtene scaffold functionalized with fused ring bithiophene derivatives, namely 4H‐cyclopenta[2,1‐b3:4b′]dithiophene (CPDT) and dithieno[3,3‐b:2′,3′‐d]pyrrole (DTP), were synthesized. The racemates were fully characterized and resolved into antipodes by enantioselective HPLC. The enantiomers were analyzed through
两个新的固有手性寡聚噻吩,其特征是通过稠合环联噻吩衍生物功能化的阻转异构体3,3'-联萘撑骨架,即4 H-环戊[ 2,1– b 3:4 b ']二噻吩(CPDT)和二硫代[3,3] ‐ b:2′,3′‐ d合成了]吡咯(DTP)。外消旋体已被充分表征,并通过对映选择性HPLC拆分为对映体。通过不同的手性技术分析对映异构体:采用电子圆二色性(ECD)和振动圆二色性(VCD)赋予绝对构型(AC)。实验和计算的VCD光谱的比较证实了DFT计算的构象特征。用FeCl 3氧化被两个CPDT单元官能化的化合物,并测量所得材料的ECD和CPL。测量了圆偏振发光(CPL),以验证固有的手性寡聚噻吩是否可能是用于手性光子学应用的有前途的系统。