Abstract
The interaction of a perylene derivative namely N,N-bis(2,5-di-tert-butylphenyl)-3,4:9,10-perylenebis (dicarboximide) (DBPI) with colloidal silver nanoparticles (AgNPs) was studied in ethanol and ethylene glycol using steady state fluorescence quenching measurements. The Stern-Volmer quenching rate constant (K-5v) was calculated as 4.03 x 10(9) and 29.14 x 10(9) M-1 in ethanol and ethylene glycol, respectively. From fluorescence quenching data, static quenching and energy transfer play a major role in the fluorescence quenching of DBPI by AgNPs. The apparent association constant (k(app)) was calculated as 1.26 x 10(8) M-1 in EtOH and 1.83 x 10(9) M-1 in ethylene glycol. Due to potential AgNPs interaction with DBPI, the average AgNPs size is increased slightly from similar to 371 nm (As-prepared) to 48.9 nm. (C) 2013 Elsevier B.V. All rights reserved