Proton-transfer spectroscopy of 3-hydroxyflavone in an isolated-site crystal matrix

Journal Article · Fri Jun 01 00:00:00 EDT 1984 · Proc. Natl. Acad. Sci. U.S.A.; (United States)

DOI:https://doi.org/10.1073/pnas.81.11.3375· OSTI ID:6303271

McMorrow, D; Kasha, M

The isolated-site low-temperature crystal matrix (dilute solutions in heptane and in octane) (Shpol'skii matrix) is shown to be operative for the spectroscopic study of 3-hydroxyflavone luminescence. The observed luminescence is demonstrated to be unique proton-transfer fluorescence from the excited tautomer. A separate study at higher concentrations of aggregated molecule luminescence and excitation spectra distinguishes these for 3-hydroxyflavone from isolated-molecule spectra. The application of the Shpol'skii matrix low-temperature spectroscopy technique is suggested for other large heteroaromatic molecules, such as biomolecules containing polar groups that impart low solubility in nonaqueous solvents. 24 references, 4 figures.

• Research Organization: Florida State Univ., Tallahassee
• DOE Contract Number: AS05-78EV05855
• OSTI ID: 6303271
• Journal Information: Proc. Natl. Acad. Sci. U.S.A.; (United States), Journal Name: Proc. Natl. Acad. Sci. U.S.A.; (United States) Vol. 81:11; ISSN PNASA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
CHEMICAL REACTIONS
DATA
EMISSION SPECTROSCOPY
EXPERIMENTAL DATA
FLAVENOIDS
FLAVONES
FLUORESCENCE SPECTROSCOPY
HYDROGEN TRANSFER
INFORMATION
ISOMERIZATION
LOW TEMPERATURE
LUMINESCENCE
MATRIX ISOLATION
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
SPECTROSCOPY