Exploring the mechanism of aggregation-induced enhancement of luminescence in group 14 metalloles

INOR 703

Jerome L. Mullin, jmullin@une.edu1, Henry J. Tracy, tracy@usm.maine.edu2, James Ford, jford@usm.maine.edu2, and Fred Fridman, fred.fridman@maine.edu2. (1) Department of Chemistry, University of New England, 11 Hills Beach Road, Biddeford, ME 04005, (2) Department of Chemistry, University of Southern Maine, Science 161, P.O. Box 9300, Portland, ME 04104
Dramatic aggregation-induced enhancement (AIE) of luminescence has been reported in a variety of 1,1-substituted tetraphenylsilacyclopentadienes (siloles), as well as in some analogous germoles and stannoles. This AIE of luminescence, which makes the compounds attractive for potential use in optical devices (e.g., light emitting diodes or chemical sensors), has been observed in mixed solvent systems, thin films, and other phases, and stands in marked contrast to the typical behavior of most lumophores, which tend to undergo self-quenching or other deactivation mechanisms when forced to aggregate. The AIE of luminescence of a series of 1,1-dimethyl- and 1,1-diphenyl-siloles, germoles, and stannoles will be described, with emphasis on behavior in mixed solvent systems at different concentrations. Results of light-scattering experiments designed to measure aggregate size, and NMR experiments designed to elucidate the mechanism of AIE, will be presented.
 

General
7:00 PM-10:00 PM, Tuesday, 12 September 2006 Moscone Center -- Hall D, Poster

Division of Inorganic Chemistry

The 232nd ACS National Meeting, San Francisco, CA, September 10-14, 2006