Issue 16, 2022

White light emission generated by two stacking patterns of a single organic molecular crystal

Abstract

Dual emission by monomers and excimers is expected for single-molecule white light emitters. However, in the case of a system with an ideal excimer in a single conformation, it is very difficult to achieve their dual emission unless they have multiple chromophores in the molecule. Here, we report single-chromophore white light emission based on dual emission from the aggregation/crystallization of oxidative photocyclization condensates of diarylethene. These condensates form distinct π–π stacking by aggregation/crystallization and show structureless yellow emission due to the excited multimer in addition to blue monomer emission. Especially in the crystalline state, white light emission was observed at the International Commission on Illumination (CIE) 1931 coordinates of (0.31, 0.30). Experimental and theoretical studies have shown that white light emission is based on a balanced dual emission produced by two different stacking patterns having different overlapping areas in the crystal.

Graphical abstract: White light emission generated by two stacking patterns of a single organic molecular crystal

Supplementary files

Article information

Article type
Paper
Submitted
11 jun 2022
Accepted
19 jul 2022
First published
26 jul 2022
This article is Open Access
Creative Commons BY-NC license

Mater. Adv., 2022,3, 6466-6473

White light emission generated by two stacking patterns of a single organic molecular crystal

Y. Nakagawa, K. Kinoshita, M. Kasuno, R. Nishimura, M. Morimoto, S. Yokojima, M. Hatakeyama, Y. Sakamoto, S. Nakamura and K. Uchida, Mater. Adv., 2022, 3, 6466 DOI: 10.1039/D2MA00670G

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