How do molecular interactions affect fluorescence behavior of AIEgens in solution and aggregate states?

• 作者: Ying Yu Hao Xing Zhicong Zhou Junkai Liu Herman H.-Y.Sung Ian D.Williams Jonathan E.Halpert Zheng Zhao Ben Zhong Tang
• 来源期刊: 中国科学：化学（英文版）
• 年，卷（期）: 2022,（1）
• 所属期刊栏目: ARTICLES
• 页码范围: 135-144
• 页数: 10页
• 语种: 英文

摘要

Molecular interactions are crucial in diverse fields of protein folding,material science,nanotechnology,and life origins.Although mounting experimental research controls luminescent behavior by adjusting molecular interactions in light-emitting materials,it remains elusive to correlate microscopic molecular interactions with macroscopic luminescent behavior directly.Here,we synthesized three red luminogens with subtle structural variation and investigated the influence of molecular inter-actions on their luminescent behavior in solution and aggregate states.Our results indicate that strong n-n and D-A interactions in both dilute solution (between luminogen and solvent molecules) and aggregate (between luminogens) states cause the redshift in emission,while weak interactions (e.g.,Van der Waals,C-H…π,and C-H…F interactions) enhance the quantum yield.This work provides a thoughtful investigation into the complicated influence of various molecular interactions on luminescent behavior.