Investigation of role of silver nanoparticles on spectroscopic properties of biologically active coumarin dyes 4PTMBC and 1IPMBC
作者： U.P. Raghavendra , Mahantesha Basanagouda , J. Thipperudrappa
DOI: 10.1016/J.SAA.2015.05.094
关键词: Chemistry 、 Electron transfer 、 Coumarin 、 Fluorescence spectroscopy 、 Absorption (chemistry) 、 Silver nanoparticle 、 Photochemistry 、 Diffusion 、 Quenching (fluorescence) 、 Fluorescence
摘要: The role of silver nanoparticles on spectroscopic properties biologically active coumarin dyes 4-p-tolyloxymethyl-benzo[h]coumarin (4PTMBC) and 1-(4-iodophenoxymethyl)-benzo[f]coumarin (1IPMBC) has been investigated using absorption fluorescence spectroscopy. Silver are synthesized by chemical reduction method the estimated size Mie theory is 12 nm. spectral changes in presence suggest their possible interaction with nanoparticles. apparent association constants Benesi-Hildebrand model. Fluorescence quenching observed both addition Stern-Volmer plots found to be nonlinear showing positive deviation. magnitudes rate parameter lifetime measurements indicate collisional static mechanisms. binding number sites for type have from data. diffusion, energy transfer electron processes mechanism discussed.
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