Achieving Remarkable Mechanochromism and White-Light Emission with Thermally Activated Delayed Fluorescence through the Molecular Heredity Principle

Xu, B.; Mu, Y.; Mao, Z.; Xie, Z.; Wu, H.; Zhang, Y.; Jin, C.; Chi, Z.; Liu, S.; Xu, J.; Wu, Y-C.; Lu, P-Y.; Lien, A.; Bryce, M.R.

Abstract

Achieving high contrast mechanochromism (Δλem,max > 100 nm) and white-light emission under mild conditions from a single compound with a simple structure is a great challenge. Herein, we report a novel dual-emissive compound, namely SCP, with an asymmetric molecular structure that fully inherits the photophysical properties of the parent molecules SC2 and SP2. SCP shows high contrast, linearly tunable mechanochromism and bright white-light emission arising from a combination of traditional fluorescence and thermally activated delayed fluorescence (TADF). The origin of the dual-emission for SCP was demonstrated based on the analysis of the white-emitting single crystals. In addition, a mechanism of luminochromism for SCP driven by the application of mechanical force is proposed. These observations present a rational design strategy for the development of high performance multi-functional materials for white-light emission.

Citation

Xu, B., Mu, Y., Mao, Z., Xie, Z., Wu, H., Zhang, Y., …Bryce, M. (2016). Achieving Remarkable Mechanochromism and White-Light Emission with Thermally Activated Delayed Fluorescence through the Molecular Heredity Principle. Chemical Science, 7(3), 2201-2206. https://doi.org/10.1039/c5sc04155d

• Journal Article Type: Article
• Acceptance Date: Dec 20, 2015
• Online Publication Date: Jan 11, 2016
• Publication Date: Mar 1, 2016
• Deposit Date: Feb 1, 2016
• Publicly Available Date: Feb 2, 2016
• Journal: Chemical Science
• Print ISSN: 2041-6520
• Electronic ISSN: 2041-6539
• Publisher: Royal Society of Chemistry
• Peer Reviewed: Peer Reviewed
• Volume: 7
• Issue: 3
• Pages: 2201-2206
• DOI: https://doi.org/10.1039/c5sc04155d
• Public URL: https://durham-repository.worktribe.com/output/1413732