A General Strategy to Enhance Donor‐Acceptor Molecules Using Solvent‐Excluding Substituents
作者:Conner A. Hoelzel、Hang Hu、Charles H. Wolstenholme、Basel A. Karim、Kyle T. Munson、Kwan Ho Jung、Han Zhang、Yu Liu、Hemant P. Yennawar、John B. Asbury、Xiaosong Li、Xin Zhang
DOI:10.1002/anie.201915744
日期:2020.3.16
β-carbonyl substituent creates a structural buffer between the donor and the surrounding solvent. Through computational and experimental analyses, it is demonstrated that the β-carbonyl simultaneously attenuates two distinct solvent-dependent quenching mechanisms. Using the β-carbonyl substituent, improvements in the photophysical properties of commonly used D-A fluorophores and their enhanced performance
尽管有机供体-受体(DA)分子广泛应用于多个领域,但由于固有的极性敏感性会抑制光化学过程,因此可能会限制更多DA分子的应用。本文介绍了一种简便的化学修饰方法,可通过添加基于β-羰基的极性取代基来减弱溶剂依赖的激发态猝灭机理。结果揭示了一种机制,其中β-羰基取代基在供体和周围溶剂之间产生结构缓冲。通过计算和实验分析,证明了β-羰基同时减弱了两种不同的溶剂依赖性猝灭机理。使用β-羰基取代基