Intramolecular hydrogen bonding. 2. Enormous deuterium isotope effect on the phosphorescence of 6-hydroxybenzanthrone

Journal Article · Thu Oct 28 00:00:00 EDT 1982 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100219a002· OSTI ID:6462206

Van Benthem, M H ^[1]; Gillispie, G D; Haddon, R C

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1. State Univ. of New York, Albany

The laser-excited fluorescence and phosphorescence spectra of the title compound and its hydroxy-deuterated analogue have been measured in an n-hexane Shpol'skii matrix at 10 K. The deuterium substitution has only a minor effect on the fluorescence intensity and the fluorescence and phosphorescence vibronic patterns but leads to a greater than order of magnitude increase in the phosphorescence quantum yield. The phosphorescence lifetimes have been measured to be 19 ms for the normal isotopic species and 300 ms for the deuterated form. This probably represents the largest deuterium isotope effect yet observed in aromatic molecule photophysics.

• OSTI ID: 6462206
• Journal Information: J. Phys. Chem.; (United States), Vol. 86:22
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
DEUTERIUM
ISOTOPE EFFECTS
AROMATICS
EXPERIMENTAL DATA
FLUORESCENCE
HYDROXY COMPOUNDS
PHOSPHORESCENCE
SPECTRA
DATA
HYDROGEN ISOTOPES
INFORMATION
ISOTOPES
LIGHT NUCLEI
LUMINESCENCE
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
STABLE ISOTOPES
400302* - Organic Chemistry- Isotope Effects- (-1987)