title: Two-photon absorption in aqueous micellar solutions.
abstract: Addition of the surfactant sodium dodecyl sulfate at concentrations above the critical micelle concentration increases the fluorescence quantum yield and the two-photon absorption cross-section of charged [2.2]paracyclophane chromophores containing pairs of D-pi-D chromophores. The resulting spectra in the micellar solutions are very similar to those obtained for neutral isostructural analogues in toluene. The measured etadelta values are 1300 GM for 1C and 1920 GM for 2C, which are comparable or larger to those in toluene. These results highlight possible misleading interpretation of two-photon-induced emission for evaluating the concentration of labeled substrates used in two-photon microscopy and provide guidelines for designing molecular structures with optimized two-photon action cross-sections in water.
authors.affiliation: Mitsubishi Chemical Center for Advanced Materials, Department of Materials, Institute for Polymers and Organic Solids, University of California, Santa Barbara, California 93106, USA.
authors.forename: Han Young
authors.initials: HY
authors.lastname: Woo
authors.forename: Dmitry
authors.initials: D
authors.lastname: Korystov
authors.forename: Alexander
authors.initials: A
authors.lastname: Mikhailovsky
authors.forename: Thuc-Quyen
authors.initials: TQ
authors.lastname: Nguyen
authors.forename: Guillermo C
authors.initials: GC
authors.lastname: Bazan
mesh_terms: D000085:Acetates / Q000737:chemistry; D008823:Micelles; D036641:Microscopy, Fluorescence, Multiphoton / Q000379:methods*; D015394:Molecular Structure; D010777:Photochemistry; D011083:Polycyclic Compounds / Q000737:chemistry; D012967:Sodium Dodecyl Sulfate / Q000737:chemistry; D012996:Solutions / Q000737:chemistry; D014867:Water / Q000737:chemistry
chemical_list: C445900:(2.2)paracyclophaneacetic acid; D000085:Acetates; D008823:Micelles; D011083:Polycyclic Compounds; D012996:Solutions; D014867:Water; D012967:Sodium Dodecyl Sulfate