Photochemistry of some deoxybenzoins in micellar solutions. Cage effects, isotope effects, and magnetic field effects
Journal Article
·
· J. Am. Chem. Soc.; (United States)
The photolyses of 1,2-diphenyl-2-methyl-1-propanone (1) and its D-, /sup 13/C-, and alkyl-substituted derivatives 2 to 5 in various micellar solutions have been investigated. It was found that the extent of cage disproprotionation to yield benzaldehydes 6 and ..cap alpha..-methylstyrenes 7 is enhanced by a factor of about 10 compared to the photolyses in homogeneous organic solvents. The advantage of using micelles rather than homogeneous solutions to enhance the magnitude of magnetic isotope and magnetic field effects on cage disproportionation is demonstrated. The results are interpreted in terms of a mechanism involving the competition between hyperfine-induced intersystem crossing of a triplet radical pair (/sup 3/RP) to form a singlet radical pair (/sup 1/RP) and escape of /sup 3/RP from the micelle.
- Research Organization:
- Columbia Univ., New York, NY
- OSTI ID:
- 6461678
- Journal Information:
- J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 103:14; ISSN JACSA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Magnetic and micellar effects on photoreactions. Micellar cage and magnetic isotope effects on quantum yields. Correlation of /sup 13/C enrichment parameters with quantum yield measurements
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Micellar radical pair decay
Journal Article
·
Tue Nov 20 23:00:00 EST 1979
· J. Am. Chem. Soc.; (United States)
·
OSTI ID:5528521
Photochemistry in ultrahigh laboratory magnetic fields. Photolysis of micellar solutions of dibenzyl ketones and phenyibenzyl ketones at 145,000 G. Observation of a. delta. gH effect on the cage reaction
Journal Article
·
Thu Dec 31 23:00:00 EST 1981
· J. Phys. Chem.; (United States)
·
OSTI ID:5276264
Micellar radical pair decay
Journal Article
·
Fri Nov 30 23:00:00 EST 1990
· Journal of Chemical Physics; (USA)
·
OSTI ID:5995581
Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400302 -- Organic Chemistry-- Isotope Effects-- (-1987)
400500* -- Photochemistry
CARBON 13
CARBON ISOTOPES
CHEMICAL REACTIONS
DATA
DECOMPOSITION
DEUTERIUM
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
HYDROGEN ISOTOPES
INFORMATION
ISOTOPE EFFECTS
ISOTOPES
KETONES
LIGHT NUCLEI
MAGNETIC FIELDS
MICELLAR SYSTEMS
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
ORGANIC SOLVENTS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
SOLVENTS
STABLE ISOTOPES
400302 -- Organic Chemistry-- Isotope Effects-- (-1987)
400500* -- Photochemistry
CARBON 13
CARBON ISOTOPES
CHEMICAL REACTIONS
DATA
DECOMPOSITION
DEUTERIUM
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
HYDROGEN ISOTOPES
INFORMATION
ISOTOPE EFFECTS
ISOTOPES
KETONES
LIGHT NUCLEI
MAGNETIC FIELDS
MICELLAR SYSTEMS
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
ORGANIC SOLVENTS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
SOLVENTS
STABLE ISOTOPES