title: Fluorescence Quenching of Perylene DBPI Dye by Colloidal Low-Dimensional Gold Nanoparticles.
abstract: The interaction of a perylene DBPI dye [N,N-bis(2,5-di-tert-butylphenyl)-3,4:9,10-perylenebis(dicarboximide)] with aqueous colloidal gold nanoparticles (AuNPs) was studied using steady state fluorescence quenching measurements. The Stern-Volmer quenching rate constant (Ksv) was calculated as ~2.2 × 10(8) and ~1.072 × 10(9) M(-1) in ethanol and ethylene glycol respectively. From fluorescence quenching data, the static quenching and energy transfer play a significant role in the fluorescence quenching of DBPI with AuNPs. The apparent association constant (Kapp) was calculated as ~1.4 × 10(9) (EtOH)and ~3.7 × 10(9) M(-1) (ethylene). Due to AuNPs interaction with DBPI, the average aggregated colloidal AuNPs size is increased from ~53.39 nm (before interaction) to ~94.12 nm (after interaction).
authors.affiliation: Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah, 21589, Saudi Arabia.
authors.forename: Samy A
authors.initials: SA
authors.lastname: El-Daly
authors.forename: Mohammed M
authors.initials: MM
authors.lastname: Rahman
authors.forename: Kalid A
authors.initials: KA
authors.lastname: Alamry
authors.forename: Abdullah M
authors.initials: AM
authors.lastname: Asiri
mesh_terms: D004735:Energy Transfer; D005456:Fluorescent Dyes / Q000737:chemistry*; D017979:Gold Colloid / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D010569:Perylene / Q000737:chemistry*; D013050:Spectrometry, Fluorescence / Q000379:methods*
chemical_list: D005456:Fluorescent Dyes; D017979:Gold Colloid; D010569:Perylene