Author(s)

Yusif S. El-Sayed, Mohamad Gaber

Department of Chemistry, Faculty of Science, Tanta University, Tanta, Egypt.
Department of Chemistry, Faculty of Science, Tanta University, Tanta, Egypt; Deanery of Academic Services, Basic Science Department, Taibah University, Madina, Saudi Arabia.

Quenching the fluorescence of the dyes 3-(4’-dimethylaminophenyl)-1-(1H-pyrrol-2-yl)prop-2-en-1-one (DMAPrP), 3- (4’-dimethylaminophenyl)-1-(2-furanyl)prop-2-en-1-one (DMAFP) and 3-(4’-dimethylaminophenyl)-1-(2-thienyl)prop- 2-en-1-one (DMATP) has been investigated in the presence of silver cation and silver nanoparticles in different media. The results of the quenching experiments were analyzed using Stern-Volmer equation. Quenching the fluorescence of the dyes decreased with increasing medium viscosity. The Stern-Volmer constant (K_SV) values in the absence and presence of ethylene glycol show that the quenching efficiencies decrease as the medium viscosity increases indicating that the quenching process is a diffusion-controlled process, and this is consistent with a dynamic-type quenching.

Ag Nanoparticles; Laser Dyes; Surfactants, Fluorescence Quenching

El-Sayed, Y. and Gaber, M. (2012) Excited State Interaction of Laser Dyes and Silver Nanoparticles in Different Media. Advances in Nanoparticles, 1, 54-60. doi: 10.4236/anp.2012.13008.