Concentration-modulated absorption spectroscopy and the triplet state: Photoinduced absorption/bleaching in erythrosin B, rose bengal and eosin y

W. Jeremy Jones, Andras Grofcsik, Miklos Kubinyi, Daniel Thomas

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The pump and probe method concentration-modulated absorption spectroscopy has been applied for studying the triplet characteristics of dyes erythrosin B, rose bengal and eosin y in ethanol solutions. Using the 514.5 and 488 nm lines of an argon ion laser for pump and probe beams, respectively, photoinduced bleaching for erythrosin B and eosin y and photoinduced absorption for rose bengal have been observed. The theory developed for describing the interactions of dye molecules of strong triplet forming ability with continuous wave pump and probe beams of Gaussian beam profiles has been tested by analysing the probe power gain or loss at different positions along the optical path of the focused collinear beams. From the gain-modulation frequency curves triplet absorption cross sections and the lifetimes of the triplet states have been determined.

Original languageEnglish
Pages (from-to)121-129
Number of pages9
JournalJournal of Molecular Structure
Volume792-793
DOIs
Publication statusPublished - Jul 3 2006

Fingerprint

Erythrosine
Rose Bengal
bleaching
Eosine Yellowish-(YS)
Bleaching
Absorption spectroscopy
atomic energy levels
Spectrum Analysis
absorption spectroscopy
Pumps
Coloring Agents
pumps
Ion Pumps
probes
Gas Lasers
Dyes
dyes
power gain
Gaussian beams
Argon

Keywords

  • Photoinduced absorption/bleaching
  • Triplet
  • Xanthene dyes

ASJC Scopus subject areas

  • Structural Biology
  • Organic Chemistry
  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Atomic and Molecular Physics, and Optics
  • Materials Science (miscellaneous)

Cite this

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AU - Jones, W. Jeremy

AU - Grofcsik, Andras

AU - Kubinyi, Miklos

AU - Thomas, Daniel

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AB - The pump and probe method concentration-modulated absorption spectroscopy has been applied for studying the triplet characteristics of dyes erythrosin B, rose bengal and eosin y in ethanol solutions. Using the 514.5 and 488 nm lines of an argon ion laser for pump and probe beams, respectively, photoinduced bleaching for erythrosin B and eosin y and photoinduced absorption for rose bengal have been observed. The theory developed for describing the interactions of dye molecules of strong triplet forming ability with continuous wave pump and probe beams of Gaussian beam profiles has been tested by analysing the probe power gain or loss at different positions along the optical path of the focused collinear beams. From the gain-modulation frequency curves triplet absorption cross sections and the lifetimes of the triplet states have been determined.

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