• Title of article

    Ultrafast excited-state proton transfer from hydroxycoumarin-dipicolinium cyanine dyes

  • Author/Authors

    Simkovitch، نويسنده , , Ron and Kisin-Finfer، نويسنده , , Einat and Shomer، نويسنده , , Shay and Gepshtein، نويسنده , , Rinat and Shabat، نويسنده , , Doron and Huppert، نويسنده , , Dan، نويسنده ,

  • Issue Information
    روزنامه با شماره پیاپی سال 2013
  • Pages
    9
  • From page
    45
  • To page
    53
  • Abstract
    The photoprotolytic properties of a recently synthesized photoacid, hydroxycoumarin-dipicolinium salt (HCD) were studied by means of time-resolved emission techniques. We found that HCD is a super-photoacid with p K a * < − 2 and with an excited-state proton transfer to water with a rate constant of k PT = 1.4 × 10 11  s − 1 . We also found that HCD undergoes ESPT in a large number of protic solvents. The kinetic isotope effect is about two for water, methanol and ethanol.
  • Keywords
    Photoacid , Excited-state proton transfer , Near infrared cyanine dye , Ultrafast phenomena , geminate recombination , Laser induced processes
  • Journal title
    Journal of Photochemistry and Photobiology:A:Chemistry
  • Serial Year
    2013
  • Journal title
    Journal of Photochemistry and Photobiology:A:Chemistry
  • Record number

    1627482

    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=10&DC=1627482