Fluorescence characteristics of protonated form of 6-hydroxyquinoline in Nafion® film

Fluorescence characteristics of 6-hydroxyquinoline (6-HQ) have been studied at room temperature in Nafion® film by steady state and nano-second time-resolved fluorescence spectroscopy. The fluorescence spectrum exhibits single emission band corresponding to the protonated form of 6-HQ in this matrix...

Full description

Saved in:
Bibliographic Details
Published in:Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Molecular and biomolecular spectroscopy, 2003-02, Vol.59 (3), p.559-567
Main Authors: Mehata, M.S, Joshi, H.C, Tripathi, H.B
Format: Article
Language:English
Subjects:
6-Hydroxyquinoline
Cationic species
Fluorescence characteristics
Fluorocarbon Polymers - chemistry
Hydroxyquinolines - chemistry
Methanol
Nafion
Photochemistry
Protons
Spectrometry, Fluorescence
Spectrophotometry
Water
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Fluorescence characteristics of 6-hydroxyquinoline (6-HQ) have been studied at room temperature in Nafion® film by steady state and nano-second time-resolved fluorescence spectroscopy. The fluorescence spectrum exhibits single emission band corresponding to the protonated form of 6-HQ in this matrix. However, the decay fits with two or three exponential functions depending on the emission wavelength monitored. At blue edge of the emission, the decay fits to three-exponential function, whereas at longer wavelengths, the decay fits to bi-exponential function. Two tentative mechanisms have been proposed to explain the experimental data, viz. a closely lying charge transfer state (CT) or an excited state proton transfer (ESPT) process. The photophysical parameters appear to be sensitive to the change in microstructure due to swelling of the membrane by the solvents.
ISSN:1386-1425
DOI:10.1016/S1386-1425(02)00206-8