Quenching of fluorescence of aromatic molecules by graphene due to electron transfer

Details Quenching of fluorescence of aromatic molecules by graphene due to electron transfer Quenching of fluorescence of aromatic molecules by graphene due to electron transfer

2010-09-20

arxiv.org/abs/1009.3700v1

Physics

Condensed Matter

Materials Science

18 pages, 6 figures

Scientific paper

Investigations on the fluorescence quenching of graphene have been carried out with two organic donor molecules, pyrene butanaoic acid succinimidyl ester (PyBS, I) and oligo(p-phenylenevinylene) methyl ester (OPV-ester, II). Absorption and photoluminescence spectra of I and II recorded in mixture with increasing the concentrations of graphene showed no change in the former, but remarkable quenching of fluorescence. The property of graphene to quench fluorescence of these aromatic molecules is shown to be associated with photo-induced electron transfer, on the basis of fluorescence decay and time-resolved transient absorption spectroscopic measurements.

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