Format

Send to

Choose Destination
See comment in PubMed Commons below
Chem Asian J. 2013 Sep;8(9):2161-6. doi: 10.1002/asia.201300331. Epub 2013 Jul 2.

A new V-shaped organic fluorescent compound integrated with crystallization-induced emission enhancement and intramolecular charge transfer.

Author information

1
Department of Polymer Science, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, PR China.

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 (f(w)), owing to ICT effect, and then increases with a high f(w), 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.

KEYWORDS:

charge transfer; donor-acceptor systems; fluorescence; oxadiazoles; sulfones

PMID:
23821372
DOI:
10.1002/asia.201300331
[Indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Wiley
    Loading ...
    Support Center