Abstract
Examination was made of the properties of aqueous solutions of cationic fluorosurfactants based on data for the fluorescence quenching of quinoline and acridine derivatives. The fluorosurfactant possessing a chloride counterion gave higher CMC and micellar counterion dissociation compared with those containing bromide. Micellar counterion dissociation was noted to slightly decreased with increase in NaCl but significantly to do so to less than 30 and 75 mM NaCl for C8F17CH2CH(OH)CH2NH(C2H5)2Cl and C8F17CH2CH2NC5H5 Cl, respectively. Change in 6-methoxy-N-(3-sulfopropyl)quinolinium (SPQ) fluorescence spectra with hydrogenation served as basis for determining the site of solubilization in micellar solution. Dissolved SPQ in water bulk phase underwent instant reduction with the addition of NaBH4, though SPQ in fluorosurfactant systems showed virtually no reduction owing to solubilization of SPQ in vesicles.
