Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 54, Issue 21, Pages 6270-6273Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201500426
Keywords
color mixing; dual emission; mechanochromic materials; phosphorescence; tunable emission
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Funding
- National Natural Science Foundation of China [51173210, 51073177]
- Fundamental Research Funds for the Central Universities
- Natural Science Foundation of Guangdong [S2011020001190]
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Organic mechanoluminochromic materials are mechano/piezo-responsive and promising for applications in sensors, displays, and data storage devices. However, their switching range of emission is seriously impeded by only one kind of emission (either a fluorescent or phosphorescent peak) in the spectrum of single organic compounds. This study presents a design strategy for pure organic compounds with excellent room-temperature fluorescent-phosphorescent dual-emission (rFPDE) properties, which combines the effective factors of dipenylsulfone group, crystalline state, and heavy atom effect. Following the principle of color mixing, myriad emission colors with a wide range from orange to purple and across white zone in a straight line in the chromaticity diagram of the Commission Internationale de l'Eclairage (CIE) can be obtained by simply mechanical grinding the compound. The unique properties could be concentrated on a pure organic compound through this design strategy, which provides a new efficient channel for the discovery of efficient mechano-responsive organic materials.
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