Optical manipulation of electron photodetachment in aqueous halide solutions: verification of atom-electron contact pairs via pump-repump probe spectroscopy

• Antragsteller: Privatdozent Dr. Hristo Iglev
• Fachliche Zuordnung: Physikalische Chemie von Molekülen, Flüssigkeiten und Grenzflächen, Biophysikalische Chemie
• Förderung: Förderung von 2009 bis 2012
• Projektkennung: Deutsche Forschungsgemeinschaft (DFG) - Projektnummer 93427420

• Erstellungsjahr: 2012

Zusammenfassung der Projektergebnisse

In conclusion, in the present project we performed series of pump-probe and pumprepump-probe investigations on Cl–, Br–, I–, OH– dissolved in water and different alcohols, as well as on neat water. Our investigation sheds light on the electron photodetachment mechanism providing quantitative information on the involved recombination processes. Our data represent an experimental verification for the formation of the predicted donor-electron pairs. Furthermore, we find a novel fast recombination mechanism after electron photodetachment of aqueous hydroxide and neat water. The results demonstrate the potential of the pump-repump-probe spectroscopy to elucidate the mechanism of ultrafast ET reactions in more detail.

Projektbezogene Publikationen (Auswahl)

• “Femtosecond electron detachment of aqueous bromide studied by two and three pulse spectroscopy”, Phys. Chem. Chem. Phys. 11, 10939–10944 (2009)
  M. K. Fischer, A. Laubereau, H. Iglev
  
• “The solvated electron dynamics in aqueous bromide studied by three-pulse spectroscopy”, Ultrafast Phenomena XVI, Springer Series in Chem. Physics 92, Eds. P. Corcum, S. De Silvestri, K. A. Nelson, E. Riedle and R.W. Schoenlein (2009) 625–627
  M. K. Fischer, H. Iglev, A. Laubereau
  
• “Untersuchungen der Ladungstrennug in wässrigen Elekrtolyten mit Zweiund Drei-Impuls Femtosekunden-Soektroskopie” (PhD Thesis, TUM 2009)
  M. K. Fischer
  
• “Electron detachment from anions in aqueous solutions studied by two and three pulse spectroscopy”, Pure and Applied Chemistry 82, 1919–1927 (2010)
  Hristo Iglev, Martin K. Fischer, Alfred Laubereau
  
• "Novel geminate recombination channel after indirect photoionization of water”, J. Chem. Phys. 134, 214507 (2011)
  Martin K. Fischer, Hubert Rossmadl, Hristo Iglev
  
• "Ultrafast geminate recombination after photodetachment of aqueous hydroxide", J. Am Chem. Soc. 133, 790–795 (2011)
  Hristo Iglev, Martin K. Fischer, Alexander Gliserin, Alfred Laubereau
  
• “Mechanism for Indirect Photo-Ionization of Water Studied by Pump-Repump-Probe Spectroscopy”, Ultrafast Phenomena XVII, Oxford University Press, 469–471 (2011)
  H. Iglev, M.K. Fischer, A. Laubereau
  
• “Ultrafast electron transfer processes studied by pump-repump-probe spectroscopy”, J. Biophotonics 4, 178–183 (2011)
  M. K. Fischer, A. Gliserin, A. Laubereau, H. Iglev
  
• ”Ultrafast dynamics in H-bonded systems studied by time-resolved spectroscopy” (Habilitation, TUM 2011)
  H. Iglev