Thermal lens technique to study the effect of pH on electronic energy transfer in organic dye mixtures

Achamma Kurian, Sajan D. George, C. V. Bindhu, V. P.N. Nampoori, C. P.G. Vallabhan

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The effect of pH on the fluorescence efficiency of fluorescein is evaluated using thermal lens technique. Fluorescence efficiency increases as the sample becomes more and more alkaline. But when fluorescein is mixed with rhodamine B fluorescence quenching of fluorescein takes place with the excitation of rhodamine B. The electronic energy transfer in this mixture is investigated using Optical Parametric Oscillator as the excitation source. The effect of pH on the efficiency of energy transfer in fluorescein-rhodamine B mixture is presented.

Original languageEnglish
Pages (from-to)678-682
Number of pages5
JournalSpectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Volume67
Issue number3-4
DOIs
Publication statusPublished - 01-07-2007

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Spectroscopy

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