Please use this identifier to cite or link to this item:
Title: Lanthanide luminescence based probe for detection of picric acid
Authors: Ananthanarayanan, R
Panda, Sitakanta
Sivaramakrishna, M
Panigrahi, B S
Keywords: Picric acid;Aromatic acid ligands;Europium;Ligand sensitization;Luminescence
Issue Date: Aug-2021
Publisher: NIScPR-CSIR, India
Abstract: Europium fluorescence is significantly enhanced through ligand sensitization using aromatic benzene mono and di carboxylic acids as ligands in aqueous solution. By optimising metal to ligand ratio and solution pH, it is established that the enhancement is maximum with isophthalic and terephthalic acid. Phosphorescence of isophthalic acid is recorded and its triplet energy level is found to be at 25633 cm-1; just above the fluorescing energy level of Eu3+. On complexation with these ligands though the europium luminescence is enhanced by orders of magnitude, the europium lifetime increased marginally. Addition of picric acid resulted in the quenching of europium luminescence in europium-isophthalic acid complex. Based on this quenching, a fluorimetric method is developed for the estimation of picric acid in aqueous solution. Picric acid in aqueous solution could be estimated down to 0.23 ppm. Common cations and anions found in natural waters did not interfere in the analysis. The precision in measurement is within 5% RSD in the entire range of measurement.
Page(s): 1041-1047
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.60A(08) [August 2021]

Files in This Item:
File Description SizeFormat 
IJCA-60A(08)1041-1047.pdf910.86 kBAdobe PDFView/Open

Items in NOPR are protected by copyright, with all rights reserved, unless otherwise indicated.