Solvent dependence of electron-transfer sensitized photolysis of onium salts

1996 ◽  
Vol 100 (7) ◽  
pp. 1191-1198 ◽  
Author(s):  
Gerd Eckert ◽  
Martin Goez ◽  
Beate Maiwald ◽  
Uwe Müller
Keyword(s):  
Electron Transfer ◽  
Solvent Dependence ◽  
Onium Salts

Electron transfer sensitized photolysis of 'onium salts

1988 ◽  
Vol 66 (2) ◽  
pp. 319-324 ◽  
Author(s):  
R. J. DeVoe ◽  
M. R. V. Sahyun ◽  
Einhard Schmidt ◽  
N. Serpone ◽  
D. K. Sharma
Keyword(s):  
Electron Transfer ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash ◽  
Quantitative Model ◽  
Intersystem Crossing ◽  
Single Electron Transfer ◽  
Onium Salts ◽  
Encounter Complex ◽  
Back Electron Transfer

We have studied the anthracene-sensitized photolyses of both diphenyliodonium and triphenylsulphonium salts in solution using both steady-state and laser flash photolysis techniques. Photoproducts, namely, phenylated anthracenes along with iodobenzene or diphenylsulphide, respectively, are obtained from both salts with quantum efficiencies of ca. 0.1 at 375 nm. We infer the intermediacy of diphenyliodo and triphenylsulphur radicals formed by single electron transfer from the singlet-excited anthracene. We have developed a quantitative model of this chemistry, and identify the principal sources of inefficiency as back electron transfer, which occurs at nearly the theoretically limiting rate, intersystem crossing from the initially formed sensitizer–'onium salt encounter complex, and in-cage radical recombination.

ChemInform Abstract: Intramolecular Photochemical Electron Transfer. Part 5. Solvent Dependence of Electron Transfer in a Porphyrin-Amide-Quinone Molecule.

ChemInform ◽  
1989 ◽  
Vol 20 (36) ◽  
Author(s):  
J. A. SCHMIDT ◽  
J.-Y. LIU ◽  
J. R. BOLTON ◽  
M. D. ARCHER ◽  
V. P. Y. GADZEKPO
Keyword(s):  
Electron Transfer ◽  
Solvent Dependence
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