title: Spectroscopic studies of 1,4-dimethoxy-2,3-dimethylanthracene-9,10-dione on plasmonic silver nanoparticles.
abstract: Silver nanoparticles (Ag NPs) of different sizes from 7nm to 22nm have been prepared by simple Dirk and Charles chemical method and characterized using UV-vis spectroscopy and high resolution transmission electron microscopy (HRTEM). Fluorescence quenching of 1,4-dimethoxy-2,3-dimethylanthracene-9,10-dione (DMDMAD) by silver nanoparticles has been investigated by fluorescence spectroscopy to understand the role of quenching mechanism. Furthermore, the intensity of DMDMAD fluorescence emission peak decreases with decrease in the size of the Ag NPs. The fluorescence quenching rate constant and association constant for above system were determined using Stern-Volmer and Benesi-Hildebrand plots. The mechanism of DMDMAD fluorescence quenched by Ag NPs was discussed according to the Stern-Volmer equation. It has been observed that the quenching due to Ag NPs proceeds via dynamic quenching process. The distance between DMDMAD (donor) to Ag NPs (acceptor) and the critical energy transfer distance were estimated based on the Förster Resonance Energy Transfer (FRET) theory.
authors: Department of Physics, Mother Teresa Women's University, Kodaikanal 624 101, Tamil Nadu, India.
authors: S R
authors: SR
authors: Kavitha
authors: Department of Physics, Mother Teresa Women's University, Kodaikanal 624 101, Tamil Nadu, India. Electronic address: ums10@yahoo.com.
authors: M
authors: M
authors: Umadevi
authors: Laboratoire de Pharmaco-Chimie Radicalaire, Faculté de Pharmacie, Aix-Marseille Univ, CNRS, Institut de Chimie Radicalaire ICR, UMR 7273, 27 Boulevard Jean Moulin, 13385 Marseille Cedex 05, France.
authors: P
authors: P
authors: Vanelle
authors: Laboratoire de Pharmaco-Chimie Radicalaire, Faculté de Pharmacie, Aix-Marseille Univ, CNRS, Institut de Chimie Radicalaire ICR, UMR 7273, 27 Boulevard Jean Moulin, 13385 Marseille Cedex 05, France.
authors: T
authors: T
authors: Terme
authors: Laboratoire de Pharmaco-Chimie Radicalaire, Faculté de Pharmacie, Aix-Marseille Univ, CNRS, Institut de Chimie Radicalaire ICR, UMR 7273, 27 Boulevard Jean Moulin, 13385 Marseille Cedex 05, France.
authors: O
authors: O
authors: Khoumeri
authors: X-ray Crystallography Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500 007, India.
authors: B
authors: B
authors: Sridhar
mesh_terms: D000873:Anthracenes / Q000737:chemistry*; D031541:Fluorescence Resonance Energy Transfer; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D008958:Models, Molecular; D012834:Silver / Q000737:chemistry*; D013050:Spectrometry, Fluorescence
chemical_list: D000873:Anthracenes; D012834:Silver; C029126:9,10-dimethylanthracene
keywords: 1,4-Dimethoxy-2,3-dimethylanthracene-9,10-dione; Energy transfer; Fluorescence quenching; Optical absorption; Quantum yield; Silver nanoparticle