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LMU München
Fakultät für Physik


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Impressum
(c) 2002 BMO

Photoisomerizations
(Femtochemistry - Femtobiology)

Trans-cis isomerizations in molecules containing double bonds are among the most fundamental reactions in organic chemistry. Thermal isomerisations usually involve large barriers and are slow. Dynamic aspects of the isomerization can thus not be addressed. Photoisomerizazions can proceed with characteristic times given by vibrational periods, i.e. occur on the femto- to picosecond time scale.
We are interested in the various factors influencing the isomerisation dynamics. In particular, we try to separate processes occuring on the excited state surface from the ground state processes. This we achieve by comparing femtosecond fluorescence and absorption signatures. Among the systems studied are azobenzenes, retinal proteins, and thioacetamides.


Previous coworkers:  Thorben Cordes
Peter Gilch
Bjoern Heinz
Helmut Satzger
Bernhard Schmidt


Publications:  "Molecular Driving Forces for Z/E Isomerization Mediated by Heteroatoms: The Example Hemithioindigo"
Artur Nenov, Thorben Cordes, Teja T. Herzog, Wolfgang Zinth, Regina de Vivie-Riedle
The Journal of Physical Chemistry A 114, 13016-13030 (2010)
Details

"Photochromic bis(thiophen-3-yl)maleimides studied with time-resolved spectroscopy"
C. Elsner, T. Cordes, P. Dietrich, M. Zastrow, T. T. Herzog, K. Rück-Braun, W. Zinth
The Journal of Physical Chemistry A, 2009, 113 (6), pp 10331039
Details

"Accelerated and Efficient Photochemistry from Higher Excited Electronic States in Fulgide Molecules"
T. Cordes, S. Malkmus, J. DiGirolamo, W. J. Lees, A. Nenov, R. de Vivie-Riedle, M. Braun, W. Zinth
The Journal of Physical Chemistry A112 (51) (2008) 1336413371.
Details

"Charakterisierung und Ultrakurzzeitspektroskopie von neusynthetisierten Schaltfarbstoffen"
Teja Herzog
Details

"Chemical Control of Hemithioindigo-Photoisomerization Substituent-Effects on Different Molecular Parts"
T. Cordes, T. Schadendorf, K. Rück-Braun, and W. Zinth
Chemical Physics Letters 455 (2008) 197-201
Details

"The Hammett Relationship and Reactions in the Excited Electronic State: Hemithioindigo Z/E-Photoisomerization"
T. Cordes, T. Schadendorf, B. Priewisch, K. Rück-Braun, and W. Zinth
The Journal of Physical Chemistry A 112 (2008) 581-588
Details

"Slower processes of the ultrafast photo-isomerization of an azobenzene observed by IR spectroscopy"
F. O. Koller, C. Sobotta, T. E. Schrader, T. Cordes, W. J. Schreier, A. Sieg, and P. Gilch
Chemical Physics 341 (2007) 258-266
Details

"Infrared studies of small azobenzene peptides - unexpectedly slow reactions on the time range of minutes"
Florian O. Koller, Rossana Reho, Tobias E. Schrader, Luis Moroder, Josef Wachtveitl, Wolfgang Zinth
Journal of Physical Chemistry B, 111 (2007) 10481-10486
Details

"Photochemical Z &rarr E Isomerization of a Hemithioindigo/Hemistilbene omega-Amino Acid"
T. Cordes, B. Heinz, N. Regner, C. Hoppmann, T. E. Schrader, W. Summerer, K. Rück-Braun, and W. Zinth
ChemPhysChem 8 (2007) 1713 - 1721
Details

"Comparing a Photoinduced Pericyclic Ring Opening and Closure: Differences in the Excited State Pathways"
B. Heinz, S. Malkmus, S. Laimgruber, S. Dietrich, C. Schulz, K. Rück-Braun, M. Braun, W. Zinth, P. Gilch
J. Am. Chem. Soc. 129 (2007) 8577
Details

"Hemithioindigo-Based Photoswitches as Ultrafast Light Trigger in Chromopeptides"
T. Cordes, D. Weinrich, S. Kempa, K. Riesselmann, S. Herre, C. Hoppmann, K. Rück-Braun, and W. Zinth
Chemical Physics Letters 428 (2006) 167 - 173
Details



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Letzte Änderung: 2016-08-31 08:07