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has been cited by the following article:

• TITLE: Excited State Interaction of Laser Dyes and Silver Nanoparticles in Different Media

  AUTHORS: Yusif S. El-Sayed, Mohamad Gaber

  KEYWORDS: Ag Nanoparticles; Laser Dyes; Surfactants, Fluorescence Quenching

  JOURNAL NAME: Advances in Nanoparticles, Vol.1 No.3, November 30, 2012

  ABSTRACT: 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 (KSV) 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.