Interaction of singlet and triplet excited states with the same quencher in micelles

✍ Scribed by Marta E. Daraio; Pedro F. Aramendía; Enrique San Román

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 407 KB
• Volume: 204
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(93)89179-l

✦ Synopsis

Time-resolved and steady state equations for successive singlet and triplet quenching by the same quencher in micelles are developed. The model assumes that: (i) the quencher can distribute between micellar and aqueous phases, (ii) the probe is completely micellized, and (iii) the distribution kinetics competes only with triplet events. The four parameters of the model: singlet quenching, triplet quenching, the quencher exit rate constant and quencher distribution equilibrium constant can be obtained from fluorescence and triplet quenching experiments, Limiting cases are analyzed and the solutions are applied to zinc phthalocyanine quenching by methyl benzoquinone in CTAC.