title: Heptamethine cyanine dyes with a large stokes shift and strong fluorescence: a paradigm for excited-state intramolecular charge transfer.
abstract: New heptamethine cyanine dyes with an alkylamino group at the central position were found to exhibit a large Stokes shift (>140 nm) and strong fluorescence. They were suggested to be a new paradigm for excited-state intramolecular charge transfer (ICT). The configuration change of the bridgehead amine accompanying ICT was investigated in different viscosity and pH media.
authors.affiliation: State Key Laboratory of Fine Chemicals, Dalian University of Technology, 158 Zhongshan Rd., Dalian 116012, PR China. pengxj@dlut.edu.cn
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Peng
authors.forename: Fengling
authors.initials: F
authors.lastname: Song
authors.forename: Erhu
authors.initials: E
authors.lastname: Lu
authors.forename: Yanan
authors.initials: Y
authors.lastname: Wang
authors.forename: Wei
authors.initials: W
authors.lastname: Zhou
authors.forename: Jiangli
authors.initials: J
authors.lastname: Fan
authors.forename: Yunling
authors.initials: Y
authors.lastname: Gao
mesh_terms: D015374:Biosensing Techniques / Q000379:methods; D002232:Carbocyanines / Q000737:chemistry*; D005456:Fluorescent Dyes / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D019265:Spectroscopy, Near-Infrared / Q000379:methods
chemical_list: D002232:Carbocyanines; D005456:Fluorescent Dyes