Rapid excitation quenching by host micelles. Observations from hexadecylpyridinium chloride and BRIJ-35 micellar systems containing pyrene

Journal Article · Thu Sep 04 04:00:00 EDT 1980 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100455a014· OSTI ID:6071811

Sapre, A V; Rama Rao, K V.S.; Rao, K N

A cationic surfactant hexadecylpyridinium chloride (CPC) quenches the fluorescence emission from pyrene. Below the critical micellar concentration (CMC) of CPC, the quenching rate is diffusion controlled. Above the CMC, the quenching rate becomes faster and finally becomes independent of the surfactant concentrations. The observations were interpreted on the basis of partitioning of pyrene between the aqueous and micellar phases. For pyrene solubilized in the micellar core the estimated emission lifetime of < 0.4 nanosec is in sharp departure from diffusion-controlled quenching mechanism requiring a lifetime of > 100 nanosec. Quenching of pyrene also was studied in the BRIJ-35-CPC mixed micelle system.

• OSTI ID: 6071811
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 84:18; ISSN JPCHA
• Country of Publication: United States
• Language: English

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AROMATICS
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CHEMICAL REACTIONS
COLLOIDS
CONDENSED AROMATICS
DECOMPOSITION
DISPERSIONS
EMULSIONS
ENERGY SOURCES
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PHOTOLYSIS
PYRENE
QUENCHING
RECOVERY
SODIUM COMPOUNDS
SODIUM SULFATES
SOLUBILITY
SULFATES
SULFUR COMPOUNDS
SURFACTANTS
THERMODYNAMICS
WATERFLOODING
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