Article ID Journal Published Year Pages File Type
1404603 Journal of Molecular Structure 2006 9 Pages PDF
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.

Related Topics
Physical Sciences and Engineering Chemistry Organic Chemistry
Authors
, , , ,