Dye fluorescence quenching by newly synthesized silver nanoparticles

作者：Bardajee Ghasem Rezanejade^*; Hooshyar Zari; Khanjari Mohaddeseh

来源：Journal of Photochemistry and Photobiology A: Chemistry , 2014, 276: 113-121.

DOI：10.1016/j.jphotochem.2013.11.005

• Fluorescence quenching
• Dye
• Silver nanoparticle
• Energy transfer
• DiAmsar

New types of silver nanoparticles (Ag NPs) were prepared by the reduction of silver trifluoroacetate with diamine-sarcophagine (DiAmsar) in DMF solution. Nanoparticles growth, morphology, and chemical composition were determined by ultraviolet-visible spectroscopy, transmission electron microscopy, and Fourier transform infrared spectroscopy, respectively. The effect of prepared Ag NPs on the fluorescence quenching of the dyes rhodamine 6G and 4-hydroxycoumarin were investigated in different temperatures. The results of the quenching experiments were analyzed using Stern-Volmer equation. The Stern-Volmer constant values showed that the quenching efficiencies decreased as the temperature increases indicating that the quenching process was a dynamic-type quenching. Moreover, the energy transfer behavior between Ag NPs and dye molecules were interrogated using Forster/fluorescence resonance energy transfer and nanomaterial surface energy transfer models. The anti-bacterial activities of Ag NPs were assessed against the Staphylococcus aureus and Escherichia coli bacteria. Results showed that the entitled Ag NPs have excellent antibacterial properties.

• 出版日期2014-2-15