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Thermally Activated Delayed Fluorescence in Cu(I) Complexes Originating from Restricted Molecular Vibrations

Li, G.; Nobuyasu, R.; Zhang, B.-H.; Geng, Y.; Yao, B.; Xie, Z.-Y.; Zhu, D.-X.; Shan, G.-G.; Che, W.-L.; Yan, L.-K.; Su, Z.-M.; Dias, F.B.; Bryce, M.R.

Thermally Activated Delayed Fluorescence in Cu(I) Complexes Originating from Restricted Molecular Vibrations Thumbnail


Authors

G. Li

R. Nobuyasu

B.-H. Zhang

Y. Geng

B. Yao

Z.-Y. Xie

D.-X. Zhu

G.-G. Shan

W.-L. Che

L.-K. Yan

Z.-M. Su



Abstract

The mechanism of thermally activated delayed fluorescence (TADF) in molecules in aggregated or condensed solid states has been rarely studied and is not well understood. Nevertheless, many applications of TADF emitters are strongly affected by their luminescence properties in the aggregated state. In this study, two new isomeric tetradentate Cu(I) complexes which simultaneously show aggregation induced emission (AIE) and TADF characteristics are reported for the first time. We provide direct evidence that effectively restricting the vibrations of individual molecules is a key requisite for TADF in these two Cu(I) complexes through in-depth photophysical measurements combined with kinetic methods, single crystal analysis and theoretical calculations. These findings should stimulate new molecular engineering endeavours in the design of AIE-TADF active materials with highly emissive aggregated states.

Citation

Li, G., Nobuyasu, R., Zhang, B., Geng, Y., Yao, B., Xie, Z., …Bryce, M. (2017). Thermally Activated Delayed Fluorescence in Cu(I) Complexes Originating from Restricted Molecular Vibrations. Chemistry - A European Journal, 23(49), 11761-11766. https://doi.org/10.1002/chem.201701862

Journal Article Type Article
Acceptance Date Jul 14, 2017
Online Publication Date Aug 10, 2017
Publication Date Sep 4, 2017
Deposit Date Jul 26, 2017
Publicly Available Date Jul 26, 2017
Journal Chemistry - A European Journal
Print ISSN 0947-6539
Electronic ISSN 1521-3765
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 23
Issue 49
Pages 11761-11766
DOI https://doi.org/10.1002/chem.201701862

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Copyright Statement
© 2017 The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.





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