ADIABATICALLY PHOTOGENERATED THIOXANTHENIUM CATIONS - PROBES OF REACTIVITY OF NUCLEOPHILES TOWARDS EXCITED-STATE CARBOCATIONS IN AQUEOUS-SOLUTION

Authors
SHUKLA D WAN P
Citation
D. Shukla et P. Wan, ADIABATICALLY PHOTOGENERATED THIOXANTHENIUM CATIONS - PROBES OF REACTIVITY OF NUCLEOPHILES TOWARDS EXCITED-STATE CARBOCATIONS IN AQUEOUS-SOLUTION, Journal of photochemistry and photobiology. A, Chemistry, 79(1-2), 1994, pp. 55-59
Citations number
14
Categorie Soggetti
Chemistry Physical
Journal title
Journal of photochemistry and photobiology. A, Chemistry → ACNP
ISSN journal
10106030
Volume
79
Issue
1-2
Year of publication
1994
Pages
55 - 59
Database
ISI
SICI code
1010-6030(1994)79:1-2<55:APTC-P>2.0.ZU;2-F
Abstract
Photolysis of thioxanthenols 3-7 in neutral aqueous solution results i n heterolytic cleavage of the C-OH bond to generate singlet excited st ate thioxanthenium cations, which are readily observed by their charac teristic fluorescence emission. Quantum efficiencies of adiabatic phot odehydroxylation were estimated by measuring the quantum yields of flu orescence from these cations (in the range 0.0015-0.038). The reactivi ty of nucleophiles towards these cations in S1 was investigated by flu orescence quenching and product studies.