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Clustering-triggered emission strategy towards tunable multi-color persistent phosphorescence

Abstract

A clustering-triggered emission (CTE) strategy, namely the formation of heterogeneous clustered chromophores and conformation rigidification, for achieving tunable multicolor phosphorescence in single-component compounds is proposed. Nonconventional luminophores comprising of mere oxygen functionalities and free of π-bonding, i.e. D-(+)-xylose (D-Xyl), pentaerythritol (PER), D-fructose (D-Fru) and D-galactose (D-Gal), were adopted as a simple model system with explicit structure and molecular packing to address the hypothesis. Their concentrated solutions and crystals at 77 K or ambient conditions demonstrate remarkable multicolor phosphorescence afterglows in response to varying excitation wavelengths, owing to the formation of diverse oxygen clusters with sufficiently rigidified conformations. The intra- and intermolecular O…O interactions were definitely illustrated by both single crystal structure analysis and theoretical calculation. These findings shed new lights on the origin and facile achievement of tunable multicolor phosphorescence in single-component pure organics, and afford strong implications to the emission mechanism of nonconventional luminophores in turn.

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Supplementary files

Article information


Submitted
24 Dec 2019
Accepted
10 Feb 2020
First published
11 Feb 2020

This article is Open Access
All publication charges for this article have been paid for by the Royal Society of Chemistry

Chem. Sci., 2020, Accepted Manuscript
Article type
Edge Article

Clustering-triggered emission strategy towards tunable multi-color persistent phosphorescence

Q. Zhou, T. Yang, Z. Zhong, F. Kausar, Z. Wang, Y. Zhang and W. Z. Yuan, Chem. Sci., 2020, Accepted Manuscript , DOI: 10.1039/C9SC06518K

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