Prof. Dr. Ortwin Brede


Curriculum vitae

In 1966 Ortwin Brede received the Diploma in Chemistry from the Karl Marx University of Leipzig and in 1969 the Dr. rer. nat. from the Humboldt University, Berlin. From 1966 till 1969 he was Ph.D. student at the Institute of Organic Chemistry of the German Academy of Science under supervision of Profs. Ernst Schmitz and Alfred Rieche. Since 1991 he worked as scientist and later on as group leader in the Academy of Sciences of GDR, Institute of Isotopes and Radiation Reseach, Leipzig. In 1984 he got the title Dr. sc.nat. and in 1989 Facultas Docendi , lateron converted into Habilitation. From 1992 till 1996 he was supported by the Max Planck Society as a leader of the Interdisciplinary Research Group of Time-Resolved Spectroscopy at the University of Leipzig. Since 1993 he has a professorship of Physical Chemistry at the University of Leipzig. In April 2007 he retired.

His research interests are

  • radiation-induced primary processes in alkanes and alkyl chlorides,
  • electron and energy transfer reaction in non-polar media,
  • photochemical and radiation-chemical generation of thiyl radicals, study of subsequent processes of biological importance,
  • elementary processes of antioxidant action in low and high molecular as well as biological systems.

Recent Topic

Mechanism, kinetics and energetics of the free electron transfer (FET):

In the electron transfer from substituted aromatic donors to radical cations of alkanes or alkyl chlorides, two products are formed such as donor radical cations and radical dissociation products, in comparable amounts. This unusual effect is explained by an unhindered (free) electron transfer taking place in the first encounter of the reactants where the bending motions of the donor substituents are recognized in the momentum state of twist. Hence metastabele donor radical cations and dissociative ones are formed resulting in the observed products. This FET phenomenon is the first observation of the reflection of femtosecond dynamics in a bimolecular process. It is conditioned by the non-polarity of the solvent (no solvatation), high free energy of the reaction and the instantaneous electron transfer where the donor is in dynamic motion. 

letzte Änderung: 01.04.2015


Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie
04103 Leipzig

Telefon: +49 (0) 341 235 2683 / 2713