Heptamethine cyanine dyes with a large stokes shift and strong fluorescence: a paradigm for excited-state intramolecular charge transfer

J Am Chem Soc. 2005 Mar 30;127(12):4170-1. doi: 10.1021/ja043413z.

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.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Biosensing Techniques / methods
  • Carbocyanines / chemistry*
  • Fluorescent Dyes / chemistry*
  • Hydrogen-Ion Concentration
  • Spectroscopy, Near-Infrared / methods

Substances

  • Carbocyanines
  • Fluorescent Dyes