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Mechanism for triple-state concentration quenching in xanthene dyes

Journal Article · · J. Appl. Spectrosc. (Engl. Transl.); (United States)
OSTI ID:6962467
This paper studies the mechanism for the concentration self-quenching of the triplet states in the luminophores containing the internal heavy atoms. Two xanthene dyes have been chosen as objects of the study: eosin (FlBr/sup 2 -//sub 4/) and erythrosin (FlI/sup 2 -//sub 4/). The delayed fluorescence dependences, optical density changes, and phosphorescence intensity on dye concentration in the ground state are presented at room temperature. The identical values of the rate constants for erythrosin at low concentrations indicate that the annihilation is less effective than the triplet deactivation route as compared to eosin.
OSTI ID:
6962467
Journal Information:
J. Appl. Spectrosc. (Engl. Transl.); (United States), Journal Name: J. Appl. Spectrosc. (Engl. Transl.); (United States) Vol. 44:3; ISSN JASYA
Country of Publication:
United States
Language:
English

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ABSORPTION SPECTRA
ANNIHILATION
AROMATICS
AZAARENES
BASIC INTERACTIONS
BROMINE COMPOUNDS
BROMINE FLUORIDES
CARBOXYLIC ACIDS
COMPARATIVE EVALUATIONS
DE-EXCITATION
DYES
ELECTROMAGNETIC INTERACTIONS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EOSIN
ERYTHROSINE
FLUORESCEIN
FLUORESCENCE
FLUORIDES
FLUORINE COMPOUNDS
GROUND STATES
HALIDES
HALOGEN COMPOUNDS
HETEROCYCLIC COMPOUNDS
HYDROXY ACIDS
HYDROXY COMPOUNDS
INDICATORS
INTERACTIONS
IODINE COMPOUNDS
IODINE FLUORIDES
LASER MATERIALS
LUMINESCENCE
MATERIALS
MEDIUM TEMPERATURE
MULTIPLETS
OPTICAL PROPERTIES
ORGANIC ACIDS
ORGANIC BROMINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC IODINE COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PHENOLS
PHOSPHORESCENCE
PHYSICAL PROPERTIES
POLYPHENOLS
PURINES
QUANTITY RATIO
SCINTILLATION QUENCHING
SPECTRA
TEMPERATURE EFFECTS
TRIPLETS
XANTHINES