Intermolecular Electronic Coupling of Organic Units for Efficient Persistent Room-Temperature Phosphorescence

Yang, Z.; Mao, Z.; Zhang, X.; Ou, D.; Mu, Y.; Zhang, Y.; Zhao, C.; Liu, S.; Chi, Z.; Xu, J.; Wu, Y-C.; Lu, P-Y.; Lien, A.; Bryce, M.R.

doi:10.1002/anie.201509224

Intermolecular Electronic Coupling of Organic Units for Efficient Persistent Room-Temperature Phosphorescence

Yang, Z.; Mao, Z.; Zhang, X.; Ou, D.; Mu, Y.; Zhang, Y.; Zhao, C.; Liu, S.; Chi, Z.; Xu, J.; Wu, Y-C.; Lu, P-Y.; Lien, A.; Bryce, M.R.

Authors

Z. Yang

Z. Mao

X. Zhang

D. Ou

Y. Mu

Y. Zhang

C. Zhao

S. Liu

Z. Chi

J. Xu

Y-C. Wu

P-Y. Lu

A. Lien

Professor Martin Bryce m.r.bryce@durham.ac.uk
Professor

Abstract

Although persistent room-temperature phosphorescence (RTP) emission has been observed for a few pure crystalline organic molecules, there is no consistent mechanism and no universal design strategy for organic persistent RTP (pRTP) materials. A new mechanism for pRTP is presented, based on combining the advantages of different excited-state configurations in coupled intermolecular units, which may be applicable to a wide range of organic molecules. By following this mechanism, we have developed a successful design strategy to obtain bright pRTP by utilizing a heavy halogen atom to further increase the intersystem crossing rate of the coupled units. RTP with a remarkably long lifetime of 0.28 s and a very high quantum efficiency of 5 % was thus obtained under ambient conditions. This strategy represents an important step in the understanding of organic pRTP emission.

Citation

Yang, Z., Mao, Z., Zhang, X., Ou, D., Mu, Y., Zhang, Y., …Bryce, M. (2016). Intermolecular Electronic Coupling of Organic Units for Efficient Persistent Room-Temperature Phosphorescence. Angewandte Chemie International Edition, 55(6), 2181-2185. https://doi.org/10.1002/anie.201509224

Journal Article Type	Article
Acceptance Date	Oct 2, 2015
Online Publication Date	Jan 6, 2016
Publication Date	Feb 5, 2016
Deposit Date	Feb 1, 2016
Publicly Available Date	Jan 6, 2017
Journal	Angewandte Chemie International Edition
Print ISSN	1433-7851
Electronic ISSN	1521-3773
Publisher	Wiley
Peer Reviewed	Peer Reviewed
Volume	55
Issue	6
Pages	2181-2185
DOI	https://doi.org/10.1002/anie.201509224
Keywords	Intersystem crossing, Organic materials, Phosphorescence, Photochemistry, Spin–orbit coupling.
Public URL	https://durham-repository.worktribe.com/output/1393448

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Copyright Statement
This is the peer reviewed version of the following article: Yang, Z., Mao, Z., Zhang, X., Ou, D., Mu, Y., Zhang, Y., Zhao, C., Liu, S., Chi, Z., Xu, J., Wu, Y.-C., Lu, P.-Y., Lien, A. and Bryce, M. R. (2016), Intermolecular Electronic Coupling of Organic Units for Efficient Persistent Room-Temperature Phosphorescence. Angewandte Chemie International Edition, Article first published online: 6 JAN 2016, which has been published in final form at http://dx.doi.org/10.1002/anie.201509224. This article may be used for non-commercial purposes in accordance With Wiley-VCH Terms and Conditions for self-archiving.