Multi-functional bis(alkynyl)gold(III) N^C complexes with distinct mechanochromic luminescence and electroluminescence properties

Ben Yiu-Wing WONG, Hok-Lai WONG, Yi-Chun WONG, Ka Man Vonika AU, Mei-Yee CHAN, Vivian Wing-Wah YAM

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Abstract

A new class of donor-acceptor type luminescent bis(alkynyl)gold(iii) N^C complexes has been synthesized and characterized. These gold(iii) complexes not only exhibit high photoluminescence quantum yields of up to 0.81, but also interesting mechanochromic luminescence behaviors that are reversible. Upon grinding, a dramatic luminescence color change from green to red can be observed in solid samples of the gold(iii) complexes, and the mechanochromic luminescence can be readily tuned via a judicious selection of substituents on the pyridine ring. In addition, solution-processable OLEDs based on this class of complexes with EQE values of up to 4.0% have been realized, representing the first demonstration of bis(alkynyl)gold(iii) N^C complexes as emissive materials in solution-processable OLEDs. Copyright © 2017 The Royal Society of Chemistry.

Original languageEnglish
Pages (from-to)6936-6946
JournalChemical Science
Volume8
Issue number10
Early online dateAug 2017
DOIs
Publication statusPublished - Oct 2017

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Electroluminescence
Gold
Luminescence
Organic light emitting diodes (OLED)
Quantum yield
Photoluminescence
Demonstrations
Color

Citation

Wong, B. Y.-W., Wong, H.-L., Wong, Y.-C., Au, V. K.-M., Chan, M.-Y., & Yam, V. W.-W. (2017). Multi-functional bis(alkynyl)gold(III) N^C complexes with distinct mechanochromic luminescence and electroluminescence properties. Chemical Science, 8(10), 6936-6946. doi: 10.1039/c7sc02410j