title: A surfactant type fluorescence probe for detecting micellar growth.
abstract: We report on the detection of micellar growth in anionic, cationic, and catanionic surfactant systems using a novel surfactant type fluorescence probe, sodium 12-(N-dansyl)amino-dodecanate (12-DAN-ADA). The fluorescent group was incorporated in the tail of the surfactant which tethers the fluorescent group deep inside the apolar micellar cores. The fluorescence anisotropy of 12-DAN-ADA was found to be very sensitive for directly detecting the micellar growth in micelles containing oppositely charged surfactants, including cationic CTAB systems and mixed systems of oppositely charged surfactants (DEAB/SDS); in regard to the like charged SDS micellar systems, the sensitivity can be greatly enhanced by addition of a water soluble quencher which quenches the background fluorescence from the equilibrium population of free 12-DAN-ADA.
authors.affiliation: Beijing National Laboratory for Molecular Sciences (BNLMS) (State Key Laboratory for Structural Chemistry of Unstable and Stable Species), College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, PR China.
authors.forename: Lining
authors.initials: L
authors.lastname: Gao
authors.forename: Li
authors.initials: L
authors.lastname: Zhao
authors.forename: Xi
authors.initials: X
authors.lastname: Huang
authors.forename: Baocai
authors.initials: B
authors.lastname: Xu
authors.forename: Yun
authors.initials: Y
authors.lastname: Yan
authors.forename: Jianbin
authors.initials: J
authors.lastname: Huang
mesh_terms: D005456:Fluorescent Dyes / Q000737:chemistry*; D008823:Micelles; D015335:Molecular Probes / Q000737:chemistry*; D013501:Surface-Active Agents / Q000737:chemistry*
chemical_list: D005456:Fluorescent Dyes; D008823:Micelles; D015335:Molecular Probes; D013501:Surface-Active Agents