Issue 12, 2022

Aggregation-induced emission active thermally-activated delayed fluorescence materials possessing N-heterocycle and sulfonyl groups

Abstract

Novel thermally-activated delayed fluorescence (TADF) materials 2Cz2SB and 2Mi2SB, possessing N-heterocycle and arylsulfonyl groups, were synthesized and their photophysical properties in solution and the solid state were characterized. 2Cz2SB and 2Mi2SB exhibit typical TADF characteristics and aggregation-induced emission or crystallization-induced emission behaviour. Specifically, they display a blueshift of photoluminescence wavelength and an increase in photoluminescence quantum yield (ΦPL) in the aggregate and solid states, owing to suppression of thermal deactivation. The results of time-resolved IR analysis suggest that aggregate and solid state promoted suppression of geometrical changes in the excited state causes the observed increases in ΦPL.

Graphical abstract: Aggregation-induced emission active thermally-activated delayed fluorescence materials possessing N-heterocycle and sulfonyl groups

Supplementary files

Article information

Article type
Paper
Submitted
28 out 2021
Accepted
10 jan 2022
First published
11 jan 2022

J. Mater. Chem. C, 2022,10, 4607-4613

Aggregation-induced emission active thermally-activated delayed fluorescence materials possessing N-heterocycle and sulfonyl groups

Y. Matsui, Y. Yokoyama, T. Ogaki, K. Ishiharaguchi, A. Niwa, E. Ohta, M. Saigo, K. Miyata, K. Onda, H. Naito and H. Ikeda, J. Mater. Chem. C, 2022, 10, 4607 DOI: 10.1039/D1TC05196B

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