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Syntheses and photophysical properties of fluorescent 2‐aryl‐3‐hydroxy‐4‐chromenones
Author(s) -
Kauffman Joel M.,
Aziz Mohammed A.
Publication year - 1993
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570300617
Subject(s) - scintillation , chemistry , fluorescence , aryl , polystyrene , quantum yield , photochemistry , styrene , solvent , yield (engineering) , radiochemistry , detector , organic chemistry , optics , copolymer , materials science , physics , polymer , alkyl , metallurgy
The particle detectors proposed for the Super‐conducting Super Collider contain polystyrene scintillation fibers as a component. Scintillation fluors soluble in styrene are required which have improved light output and response time. New 2‐aryl‐3‐hydroxy‐4‐chromenones related to 3‐hydroxyflavone were prepared which displayed these improved properties. Improved solvent systems for chromenone formation were essential in the synthesis of two of the chromenones. One chromenone produced fluorescence emission at 560 nm with a quantum yield of 0.53 and a scintillation decay time of 5 nsec.