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Fluorescence enhancement and cofluorescence in complexes of terbium, dysprosium and europium with trimesic acid

✍ Scribed by B.S. Panigrahi; Susy Peter; K.S. Viswanathan; C.K. Mathews

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
726 KB
Volume
282
Category
Article
ISSN
0003-2670

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✦ Synopsis

The fluorescence of terbium, dysprosium and europium was enhanced by about two to three orders of magnitude when they were excited in the presence of trimesic acid in aqueous solutions at pH 6. The fluorescence was enhanced by a further order of magnitude when these IanthanideAtrimesate complexes were treated with trioctylphosphine oxide (TOPO) and Triton X-100. The enhancement following the addition of TOP0 is strongly pH dependent. An enhancement in the fluorescence of these rare earths with the carboxylate ligand is observed in the presence of ions such as La3+ and Gd3+, due to cofluorescence. The addition of La or Gd enhances the fluorescence of the lanthanide-trimesic acid complexes by ahnost two orders of magnitude, leading to detection limits in the sub-ng ml-' range for these rare earths.

πŸ“œ SIMILAR VOLUMES

Fluorescence enhancement of dysprosium,
Fluorescence enhancement of dysprosium, europium and terbium using sodium benzoate-trioctylphosphine oxide-Triton X-100
✍ Susy Peter; B.S. Panigrahi; K.S. Viswanathan; C.K. Mathews πŸ“‚ Article πŸ“… 1992 πŸ› Elsevier Science 🌐 English βš– 472 KB

The fluorescence of dysprosium, europium and terbium was enhanced by three to four orders of magnitude when these lanthanides were excited in the presence of sodium benzoate, trioctylphosphine oxide and Triton X-100 in aqueous solutions at pH = 5.5. In all instances the excitation wavelength was ca.