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)

DOI:https://doi.org/10.1021/j100215a036· OSTI ID:5276264

Turro, N J ^[1]; Chung, C J; Jones, G II; Becker, W G

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1. Columbia Univ., New York, NY

Experiments are described that were carried out to determine whether the reactions of solvated triplet radical pairs in micelle cages are determined by Zeeman-induced mixing at ultrahigh magnetic fields. Dibenzyl ketone and phenyibenzyl ketones were studied as prototypes, and data are tabulated for magnetic field effects in the cage reactions of para-monosubstituted dibenzyl ketones. The noted result that the percent cage is the same at low field and at ultrahigh fields is interpreted to mean that a new mechanism, spin-orbit coupling, dominates the reversible singlet ..-->.. triplet intersystem crossing in molecules. Data are also tabulated to show the influence of applied field strength on the percent cage produced in the photolysis of 1,2-diphenyl-2-methylpropanone and some of its isotopically substituted derivatives. From the data presented, it is concluded that the extent of cage recombination of benzyl radicals and/or substituted benzyl radical pairs produced in micelle aggregates depends on the strength of the external laboratory field applied to the samples. 21 references, 1 figure, 2 tables. (BLM)

• OSTI ID: 5276264
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 86:18; ISSN JPCHA
• Country of Publication: United States
• Language: English

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
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
INFORMATION
ISOTOPE EFFECTS
ISOTOPES
KETONES
LIGHT NUCLEI
MAGNETIC FIELDS
MICELLAR SYSTEMS
MULTIPLETS
NUCLEI
NUMERICAL DATA
ORGANIC COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
RADICALS
RECOMBINATION
SOLVATION
STABLE ISOTOPES
TRIPLETS
ZEEMAN EFFECT