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Proceedings Paper

Aggregation- and crystallization-induced light emission
Author(s): Yuning Hong; Yongqiang Dong; Hui Tong; Zhen Li; Matthias Häußler; Jacky Wing Yip Lam; Ben Zhong Tang
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Paper Abstract

A group of organic chromophoric molecules including siloles, pyrans, tetraphenylethylenes and fulvenes, are designed and synthesized. Light emissions of conventional luminescent materials are often quenched by aggregate formation. These molecules, however, become stronger luminophors when aggregated although they are practically nonemissive in their dilute solutions. By varying their packing structures in the aggregation states, emission color ranging from blue to red can be achieved. The emission of fulvenes can also be controlled by changing their morphology. While they emit a faint light in the amorphous state, their crystal forms are strongly luminescent. Intermolecular interaction or restriction of intramolecular rotation in different states may be responsible for such behaviors. Thanks to such effects, the molecules can be employed as sensors for the detection of explosives, organic solvent vapors, solution pH, and biomacromolecules. Further modification of their structures by molecular engineering endeavors may generate materials that can find an array of applications in optical display systems and as biological probes.

Paper Details

Date Published: 8 February 2007
PDF: 12 pages
Proc. SPIE 6470, Organic Photonic Materials and Devices IX, 64700T (8 February 2007); doi: 10.1117/12.707609
Show Author Affiliations
Yuning Hong, The Hong Kong Univ. of Science and Technology (Hong Kong China)
Yongqiang Dong, The Hong Kong Univ. of Science and Technology (Hong Kong China)
Zhejiang Univ. (China)
Hui Tong, The Hong Kong Univ. of Science and Technology (Hong Kong China)
Zhen Li, The Hong Kong Univ. of Science and Technology (Hong Kong China)
Matthias Häußler, The Hong Kong Univ. of Science and Technology (Hong Kong China)
Jacky Wing Yip Lam, The Hong Kong Univ. of Science and Technology (Hong Kong China)
Ben Zhong Tang, The Hong Kong Univ. of Science and Technology (Hong Kong China)
Zhejiang Univ. (China)


Published in SPIE Proceedings Vol. 6470:
Organic Photonic Materials and Devices IX
James G. Grote; Francois Kajzar; Nakjoong Kim, Editor(s)

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