Abstract

A chiral pyran derivative containing two cholesteryl groups (1) is synthesized, and its optical properties are investigated. Whereas the isolated molecule of 1 is virtually nonluminescent in dilute solutions, it becomes highly emissive with a 2 orders of magnitude increase in fluorescence quantum yield upon aggregation in poor solvents or in solid state, showing a novel phenomenon of aggregation-induced emission (AIE). The color and efficiency of the AIE of 1 can be tuned by varying the morphology of its aggregates: photoluminescence of its aggregates formed in a tetrahydrofuran/water mixture progressively red-shifts (green --> yellow --> red) with increasing water content of the mixture, with the crystalline aggregates emitting bluer lights in higher efficiencies than their amorphous counterparts.

Keywords

Quantum yieldPhotoluminescenceFluorescencePyranMoleculePhotochemistryAmorphous solidTetrahydrofuranMaterials scienceChemistryCrystallographyOrganic chemistryOpticsOptoelectronics

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Publication Info

Year
2007
Type
article
Volume
111
Issue
8
Pages
2000-2007
Citations
232
Access
Closed

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Cite This

Hui Tong, Yuning Hong, Yongqiang Dong et al. (2007). Color-Tunable, Aggregation-Induced Emission of a Butterfly-Shaped Molecule Comprising a Pyran Skeleton and Two Cholesteryl Wings. The Journal of Physical Chemistry B , 111 (8) , 2000-2007. https://doi.org/10.1021/jp067374k

Identifiers

DOI
10.1021/jp067374k
PMID
17269819

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Data completeness: 77%