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Title: A new V-shaped organic fluorescent compound integrated with crystallization-induced emission enhancement and intramolecularcharge transfer
Authors: Gu, Pei-Yang
Zhang, You-Hao
Liu, Gao-Yan
Ge, Jian-Feng
Xu, Qing-Feng
Zhang, Qichun
Lu, Jian-Mei
Issue Date: 2013
Source: Gu, P.-Y., Zhang, Y.-H., Liu, G.-Y., Ge, J.-F., Xu, Q.-F., Zhang, Q., et al. (2013). A New V-Shaped Organic Fluorescent Compound Integrated with Crystallization-Induced Emission Enhancement and IntramolecularCharge Transfer. Chemistry - An Asian Journal, 8(9), 2161-2166.
Series/Report no.: Chemistry - an Asian journal
Abstract: The emission behavior of a new V-shaped organic fluorescent compound (p,p′-bis(2-aryl-1,3,4-oxadiazol-5-yl)diphenyl sulfone (OZA-SO), consisting of diethylamino (donor) and sulfone (acceptor) units, has been studied in various polar solvents and with different morphologies. As expected, there is the gradual transition from the locally excited state to the intramolecular charge-transfer (ICT) state with the increasing solvent polarity. The photoluminescence intensity of OZA-SO initially decreases with a low water fraction (fw), owing to ICT effect, and then increases with a high fw, owing to crystallization-induced emission enhancement. At the same time, the fluorescence lifetime of OZA-SO increases from 0.062 ns in dimethylformamide (DMF) to 5.80 ns in a solution containing 90 % water, and then to 7.49 ns in a solution containing 60 % water. Furthermore, the solid-state emission of OZA-SO can be tuned reversibly from green to yellow by fuming/grinding or fuming/heating owing to morphological changes. This color-switchable feature of OZA-SO may have potential applications in optical-recording and temperature-sensing materials.
DOI: 10.1002/asia.201300331
Fulltext Permission: none
Fulltext Availability: No Fulltext
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