Spectroscopic studies of 1,4-dimethoxy-2,3-dimethylanthracene-9,10-dione on plasmonic silver nanoparticles

S R Kavitha; M Umadevi; P Vanelle; T Terme; O Khoumeri; B Sridhar

doi:10.1016/j.saa.2014.06.007

Spectroscopic studies of 1,4-dimethoxy-2,3-dimethylanthracene-9,10-dione on plasmonic silver nanoparticles

Spectrochim Acta A Mol Biomol Spectrosc. 2014 Dec 10:133:472-9. doi: 10.1016/j.saa.2014.06.007. Epub 2014 Jun 14.

Authors

S R Kavitha¹, M Umadevi², P Vanelle³, T Terme³, O Khoumeri³, B Sridhar⁴

Affiliations

¹ Department of Physics, Mother Teresa Women's University, Kodaikanal 624 101, Tamil Nadu, India.
² Department of Physics, Mother Teresa Women's University, Kodaikanal 624 101, Tamil Nadu, India. Electronic address: ums10@yahoo.com.
³ 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.
⁴ X-ray Crystallography Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500 007, India.

PMID: 24973788
DOI: 10.1016/j.saa.2014.06.007

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.

Keywords: 1,4-Dimethoxy-2,3-dimethylanthracene-9,10-dione; Energy transfer; Fluorescence quenching; Optical absorption; Quantum yield; Silver nanoparticle.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Anthracenes / chemistry*
Fluorescence Resonance Energy Transfer
Metal Nanoparticles / chemistry*
Metal Nanoparticles / ultrastructure
Models, Molecular
Silver / chemistry*
Spectrometry, Fluorescence

Substances

Anthracenes
Silver
9,10-dimethylanthracene