Excited-State Reactions

  • Joseph R. Lakowicz


In the preceding chapters we saw many examples of excited-state reactions. By an excited-state reaction we mean a molecular process which changes the structure of the excited-state fluorophore, and which occurs subsequent to excitation. Such reactions occur because light absorption frequently changes the electron distribution within a fluorophore, which in turn changes its chemical or physical properties. The best-known example of an excited-state reaction is that of phenol, which in neutral solution can lose the phenolic proton in the excited state. Deprotonation occurs more readily in the excited state because the electrons on the phenolic hydroxyl groups are shifted into the phenol ring, making this hydroxyl group more acidic.


Excited State Decay Time Phase Angle Proton Transfer Excited State Intramolecular Proton Transfer 
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Copyright information

© Springer Science+Business Media New York 1999

Authors and Affiliations

  • Joseph R. Lakowicz
    • 1
  1. 1.University of Maryland School of MedicineBaltimoreUSA

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