Environmental effects on vibronic band intensities in pyrene monomer fluorescence and their application in studies of micellar systems

Journal Article · Tue Mar 29 23:00:00 EST 1977 · J. Am. Chem. Soc.; (United States)

DOI:https://doi.org/10.1021/ja00449a004· OSTI ID:7313691

Kalyanasundaram, K; Thomas, J K

The fluorescence intensities for various vibronic fine structures in the pyrene monomer fluorescence show strong solvent dependence. In the presence of polar solvents, there is a significant enhancement in the intensity of the 0--0 vibronic band at the expense of other bands. This strong perturbation in the vibronic band intensities is more dependent on the solvent dipole moment than on the bulk solvent dielectric constant. This suggests the operation of some specific solute--solvent dipole--dipole interaction mechanism. The strong perturbation of the vibronic band intensities has been used as a probe to accurately determine critical micelle concentrations and also to investigate the extent of water penetration in micellar systems.

• Research Organization: Univ. of Notre Dame, IN
• OSTI ID: 7313691
• Journal Information: J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 99:7; ISSN JACSA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
400500* -- Photochemistry
AROMATICS
CONDENSED AROMATICS
ENERGY LEVELS
EXCITED STATES
FLUORESCENCE
HYDROCARBONS
LUMINESCENCE
MICELLAR SYSTEMS
ORGANIC COMPOUNDS
PYRENE
VIBRATIONAL STATES