Comparative study of stimulated proton-transfer luminescence of three chromones

Journal Article · Thu Apr 04 00:00:00 EST 1991 · Journal of Physical Chemistry; (United States)

DOI:https://doi.org/10.1021/j100160a010· OSTI ID:5636916

Parthenopoulos, D A; Kasha, M ^[1]; McMorrow, D ^[2]

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1. Florida State Univ., Tallahassee (United States)
2. Naval Research Lab., Washington, DC (United States)

The contrasting behavior of three related chromones with respect to amplified spontaneous emission (ASE) and laser action as intramolecular proton-transfer laser systems at room temperature is investigated. The intramolecular proton-transfer laser is considered a chemical laser in which the excited tautomer species is produced by a chemical reaction after photon-pumping activating a four-level laser system. The three chromones studied are 2-methyl-3-hydroxychromone, 2-phenyl-3-hydroxychromone (3-hydroxyflavone), and the natural product fisetin (3,3{prime},4{prime},7-tetrahydroxyflavone), each of which exhibits good proton-transfer fluorescences in the 500-nm region, with respective quantum yields of 0.29 (MCH), 0.36 (MCH), and 0.16 (dioxane). Low-temperature spectroscopic study and picosecond transient absorption spectroscopy reveals that fluorescence quenching from molecular aggregation and transient parasitic S{sub n}{prime} {l arrow} S{sub 1}{prime} absorption of the tautomer both contribute to nonobservability of ASE and lasing action in the 2-methyl-3-hydroxychromone, in contrast to excellent ASE/lasing characteristics of the 3-hydroxyflavone and fisetin under comparable conditions.

• DOE Contract Number: FG05-87ER60517
• OSTI ID: 5636916
• Journal Information: Journal of Physical Chemistry; (United States), Vol. 95:7; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
PYRONES
CHEMICAL REACTIONS
LUMINESCENCE
ABSORPTION SPECTROSCOPY
AGGLOMERATION
ALCOHOLS
AROMATICS
EXCITED STATES
FLAVONES
FLUORESCENCE
ISOMERIZATION
KETONES
LASER RADIATION
PHENOLS
PROTON TRANSPORT
TEMPERATURE EFFECTS
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
TIME RESOLUTION
TRANSIENTS
CHARGED-PARTICLE TRANSPORT
ELECTROMAGNETIC RADIATION
ENERGY LEVELS
FLAVENOIDS
HETEROCYCLIC COMPOUNDS
HYDROXY COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PYRANS
RADIATION TRANSPORT
RADIATIONS
RESOLUTION
SPECTROSCOPY
TEMPERATURE RANGE
TIMING PROPERTIES
400201* - Chemical & Physicochemical Properties