Issue 10, 2023

A high-contrast polymorphic difluoroboron luminogen with efficient RTP and TADF emissions

Abstract

A simple N,S-chelated four-coordinated difluoroboron-based emitter is reported with three polymorphs, which emit high contrast green (G), yellow (Y) and red (R) light. Interestingly, the G and R-Crystals show different thermally activated delayed fluorescence (TADF) at 530 nm and 630 nm with a remarkable emission spectral shift of up to 100 nm, while the Y-Crystal exhibits room temperature phosphorescence (RTP) at around 570 nm with a high solid-state quantum yield of 77%. Single crystal analysis and theoretical calculations reveal that different molecular conformations and packing modes lead to distinct triplet exciton conversion channels.

Graphical abstract: A high-contrast polymorphic difluoroboron luminogen with efficient RTP and TADF emissions

Supplementary files

Article information

Article type
Communication
Submitted
30 okt. 2022
Accepted
05 jan. 2023
First published
06 jan. 2023

Chem. Commun., 2023,59, 1377-1380

A high-contrast polymorphic difluoroboron luminogen with efficient RTP and TADF emissions

X. Wang, X. Wu, T. Wang, Y. Wu, H. Shu, Z. Cheng, L. Zhao, H. Tian, H. Tong and L. Wang, Chem. Commun., 2023, 59, 1377 DOI: 10.1039/D2CC05849A

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