Journal
SCIENCE CHINA-CHEMISTRY
Volume 61, Issue 6, Pages 677-686Publisher
SCIENCE PRESS
DOI: 10.1007/s11426-017-9219-x
Keywords
reversible switching luminescence; smart luminescent material; white-light emission; conformational relaxation
Categories
Funding
- National Key RAMP
- D Program of China [2016YFB0401004]
- National Natural Science Foundation of China [51625301, 51573059, 91233116]
- National Basic Research Program of China [2015CB655003]
- Guangdong Provincial Department of Science and Technology [2016B090906003, 2016TX03C175]
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An organic compound exhibiting simultaneously reversible switch between its emission colors and luminescence mechanisms, possessing high contrast from deep blue normal fluorescence (NF) to yellow thermally activated delayed fluorescence (TADF), is reported. Based on these two complementary colors, white-light emission combining NF and TADF from a single compound can be achieved in various states. Experimental results and density functional theory calculations indicate that the controllable conformational distribution under thermal and mechanical activation is the mechanism responsible for the reversible switching behavior.
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