Journal
APPLIED PHYSICS LETTERS
Volume 94, Issue 25, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3137166
Keywords
aggregation; organic compounds; photoluminescence; radiation quenching; rotational isomerism
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Funding
- National Science Foundation of China [20634020, 20703033]
- Ministry of Science & Technology of China [2009CB623605]
- Council of Hong Kong [603008, 602707, 602706]
- Postdoctoral Research Foundation of China [20070420228, 20081461]
- Cao Guangbiao Foundation of Zhejiang University
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Nitrogen-containing heterocyclic pyrazine luminogens with free (1) and locked (2) phenyl rings were readily prepared in high yields. The propeller-shaped luminogen 1 shows aggregation-induced emission feature, whereas the disk-shaped chromophore 2 shows conventional aggregation-caused quenching effect, offering a direct evidence to support our hypothesis that restriction of intramolecular rotation is the main cause for the AIE phenomenon.
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