Dual Charge-Transfer Emission in Chalcone-Based Donor-π-Acceptor System and the Modulation of Down-Conversion of Triplet Exciton with the Polarity of the Medium.

• Tác giả: Shrestha Banerjee, Pramit Kumar Chowdhury, Sujit Kumar Ghosh, Shubhangi Majumdar, Soham Mukherjee, Andrew J Musser, Pradip Pattanayak, Pradipta Purkayastha, Piyush Singh
• Ngôn ngữ: eng
• Ký hiệu phân loại: 949.5074 *Greece
• Thông tin xuất bản: Germany : Chemistry (Weinheim an der Bergstrasse, Germany) , 2025
• Bộ sưu tập: NCBI
• ID: 177713

Tóm tắt

Thermally activated delayed fluorescence (TADF) has recently emerged as a promising process with significant potential to advance organic light-emitting diodes (OLEDs) for display applications. The donor-acceptor system is a well-known molecular arrangement exhibiting TADF properties. However, our investigation into the chalcone-based donor-π-acceptor (D-π-A) system (SKG1) reveals that the en-one bridging unit in chalcone plays a crucial role in the reverse intersystem crossing (rISC) process and may be responsible for the existence of two conformational isomers. In stark contrast with the conventional endothermic TADF process, the designed molecule follows a down-converted cold rISC pathway that also from a higher-lying triplet (T