Journal
ADVANCED MATERIALS
Volume 23, Issue 29, Pages 3261-+Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201101059
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Funding
- National Science Foundation of China [50603021, 20634020, 20974028]
- Fundamental Research Funds for the Central Universities
- Research Grants Council of Hong Kong [604509, 603008, 601608, HKUST2/CRF/10]
- University Grants Committee of Hong Kong [AoE/P-03/08]
- Ministry of Science and Technology of China [2009CB623605]
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The thermochromic and mechanochromic fluorescence of diphenyldibenzofulvenes is investigated. Emission is boosted and blue-shifted upon crystallization. Yellow emissive crystals of the material transform to green fluorescent crystals upon heating before melting. Reversible switching of the emission color and efficiency are achieved by repeated amorphization and crystallization of dye molecules by a pure thermal process or grinding-heating cycles.
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