title: Dynamic quenching study of 2-amino-3-bromo-1,4-naphthoquinone by titanium dioxide nano particles in solution (methanol).
abstract: The dependence of fluorescence emission of 2-amino-3-bromo-1,4-naphthoquinone on titanium dioxide (TiO2) in methanol has been investigated. The increase in TiO2 concentration causes a decrease in the fluorescence intensity of 2-amino-3-bromo-1,4-naphthoquinone. A linear Stern-Volmer plot in this study indicates the presence of dynamic quenching. The quenching and association constants have been calculated. The quenching process is due to the electron transfer from 2-amino-3-bromo-1,4-naphthoquinone to TiO2.
authors.affiliation: Department of Laser Studies, School of Physics, Madurai Kamaraj University, Madurai 625 021, India.
authors.forename: S
authors.initials: S
authors.lastname: Pushpam
authors.forename: M
authors.initials: M
authors.lastname: Kottaisamy
authors.forename: V
authors.initials: V
authors.lastname: Ramakrishnan
mesh_terms: D000586:Amination; D000588:Amines / Q000737:chemistry*; D005453:Fluorescence; D054879:Halogenation; D000432:Methanol / Q000737:chemistry; D009285:Naphthoquinones / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D014025:Titanium / Q000737:chemistry*
chemical_list: D000588:Amines; D009285:Naphthoquinones; C009495:titanium dioxide; D014025:Titanium; C035342:1,4-naphthoquinone; D000432:Methanol
keywords: Bensi–Hilde brand equation; Dynamic quenching; Fluorescence quenching; Fluorescence quenching constant; Stern Volmer plot; Titanium dioxide nano particles