Christoph Kolano, Jan Helbing, Götz Bucher, Wolfram Sander and Peter Hamm. Intramolecular Disulfide Bridges as a Phototrigger To Monitor the Dynamics of Small Cyclic Peptides. J. Phys. Chem. B 111 , 11297-11302 (2007).
Jens Bredenbeck, Jan Helbing, Christoph Kolano and Peter Hamm. Ultrafast 2D-IR Spectroscopy of Transient Species. ChemPhysChem 8, 1747-1756 (2007).
Valentina Cervetto, Rolf Pfister, Christoph Kolano, Harald Bregy, Heinz Heimgartner, and Jan Helbing. Coexistence of Cyclic H-Bonded and Open Tetrapeptide Conformation. Chemistry - A European Journal 13, 9004-9011 (2007).
Janne A. Ihalainen, Jens Bredenbeck, Rolf Pfister, Jan Helbing, Lei Chi
y, Ivo H.M. van Stokkum , G. Andrew Woolley, Peter Hamm . Folding and unfolding of a photoswitchable peptide from picoseconds to microseconds - A time-resolved IR study. Proceedings of the National Academy of Science U.S.A. 104, 5383-5388 (2007).
Jens Bredenbeck, Jan Helbing, Karin Nienhaus, G. Ulrich Nienhaus, Peter Hamm. Protein Ligand Migration Mapped by Nonequilibrium 2D-IR Exchange Spectroscopy. Proceedings of the National Academy of Science U.S.A. 104, 14243-14248 (2007).
2006
Christoph Kolano, Jan Helbing, Mariusz Kozinski, Wolfram Sander & Peter Hamm. Watching hydrogen-bond dynamics in a b -turn by Transient 2D-IR Spectroscopy. Nature (London) 444 (7118), 469-472 (2006)
Valentina Cervetto, Harald Bregy, Peter Hamm, Jan Helbing. Time-resolved IR spectroscopy of N-Methylthioacetamide: trans -> cis isomerization upon n- p * and p-p * excitation and cis->trans photoreaction. The Journal of Physical Chemistry A, 110 , 11473-11478 (2006)
Peter Hamm, Jan Helbing, Jens Bredenbeck. Stretched versus compressed exponential kinetics in a -helix folding. Chemical Physics 323, 54-65 (2006).
2005
Jan Helbing, Karin Nienhaus, G. Ulrich Nienhaus, Peter Hamm.
Restricted Rotational Motion of CO in a Protein Internal Cavity:
Evidence for Non-Separating Correlation Functions from IR Pump-Probe
Spectroscopy. Journal of Chemical Physics. 122, 124505 (2005).
Jens Bredenbeck, Jan Helbing, Peter Hamm. Solvation Dynamics: Beyond the Two-Point Frequency Fluctuation Correlation function. Physical Review Letters 95, 083201 (2005).
Jens Bredenbeck, Jan Helbing, Janet R. Kumita, G. Andrew Wooley, Peter Hamm. a -helix formation in a photoswitchable peptide tracked from picoseconds to microseconds by time resolved IR spectroscopy. Proceedings of the National Academy of Science U.S.A. 102, 2379-2384 (2005).
2004
Jens Bredenbeck, Jan Helbing, Peter Hamm. Continous scanning from picoseconds to microseconds in time resolved linear and non-linear spectroscopy. Review of Scientific Instruments 75, 4462-4466 (2004).
Jens Bredenbeck, Jan Helbing, Peter Hamm. Transient 2D-IR spectroscopy - exploring thepolarization dependence. Journal of Chemical Physics 121, 5943-5957 (2004).
Valentina Cervetto, Jan Helbing, Jens Bredenbeck, Peter Hamm. Double-resonance versus pulsed Fourier transform 2D-IR spectroscopy: An experimental and theoretical comparison. Journal of Chemical Physics 121, 5935-5942 (2004).
Jan Helbing, Luigi Bonacina, Ruth Pietri, Jens Bredenbeck, Peter Hamm,
Frank van Mourik, Frédéric Chaussard, Alejandro Gonzalez-Gonzalez,
Majed Chergui , Cacimar Ramos-Alvarez, Carlos Ruiz, Juan López-Garriga. Time-resolved visible and infrared study of the cyano complexes of Myoglobin and of Hemoglobin I from Lucina pectinata. Biophysical Journal 87, 1881-1891 (2004).
Jan Helbing, Harald Bregy, Jens Bredenbeck, Rolf Pfister, Peter Hamm,
Robert Huber, Josef Wachtveitl, Luca De Vico, Massimo Olivucci. A
Fast Photoswitch for Minimally Perturbed Peptides: Investigation of the
trans -> cis Photoisomerization of N-Methylthioacetamide. Journal of the American Chemical Society 126, 8823-8834 (2004).
Marc Hostettler, Dieter Schwarzenbach, Jan Helbing, Vladimir Dmitriev, Hans-Peter Weber. Structure and SHG of the high pressure phase IV of HgBr2 . Solid State Communications 129, 359-363 (2004).
Jens Bredenbeck, Jan Helbing, Peter Hamm. Labeling
Vibrations by Light: Ultrafast Transient Infrared Spectroscopy Tracks
Vibrational Modes During Photoinduced Charge Transfer. Journal of the American Chemical Society 126, 990-991 (2004).
2003
Jens Bredenbeck, Jan Helbing, Christian Renner, Raymond Behrendt, Luis Moroder, Josef Wachtveitl, Peter Hamm. Transient
2D-IR spectroscopy- Snapshots of the non-equilibrium ensemble during
the picosecond conformational transition of a small peptide . Journal of Physical Chemistry B, 107, 8654-8660 (2003).
Jens Bredenbeck, Jan Helbing, Arne Sieg, Tobias Schrader, Wolfgang
Zinth, Christian Renner, Raymond Behrendt, Luis Moroder, Josef
Wachtveitl, Peter Hamm. Picosecond conformational transition and equilibration of a cyclic peptide. Proceedings of the National Academy of Science U.S.A. 100, 6452 (2003). Corrigendum ibid 100, 10580 (2003).
Earlier work
C. R. González, S. Fernández-Alberti, J. Echave, J. Helbing, M. Chergui. Simulations of the absorption band of the D-State of Hg2 in rare gas matrices. Chemical Physics Letters 367, 651-656 (2003).
J. Helbing and M. Chergui. Luminescence of ion-pair and spin-excited states of I2 in solid xenon. Journal of Luminescence, 94-95, 611 (2001).
J. Helbing and M. Chergui. Solvation of ion-pair states in non-polar media: I2 in solid Neon, Argon and Krypton. Journal of Chemical Physics, 115, 6158 (2001).
J. Helbing, M. Chergui, S. Fernandez-Alberti, J. Echave, N. Halberstadt and J. A. Beswick. Caging and excited state emission of ICN trapped in cryogenic matrices: experiment and theory . Physical Chemistry Chemical Physics 2, 4131 (2000).
J. Helbing and M. Chergui. Spectroscopy and photo-induced dynamics of ICN and its photo-products in solid argon. Journal of Physical Chemistry 104, 10293 (2000).
J. Helbing, M. Chergui and A. Haydar. Spectroscopy and energy relaxation processes of Hg-doped neon, argon and xenon. Journal of Chemical Physics 113, 3621 (2000).
J. Helbing, A.Haydar and M. Chergui. Spectroscopy and energy relaxation processes of Hg2 and Hg in solid Ne. Chemical Physics Letters 310, 43051 (1999).
A. Assion, T. Baumert, J. Helbing, V. Seyfried and G. Gerber. Femtosecond time-resolved observation of above-threshold ionization in Na2. Physical Review A 55, 1899 (1997).
A. Assion, M. Geisler, J. Helbing, V. Seyfried and T. Baumert. Femtosecond pump-probe photoelectron spectroscopy: Mapping of vibrational wave-packet motion. Physical Review A 54, R4605 (1996).
A. Assion, T. Baumert, J. Helbing, V. Seyfried und G. Gerber. Coherent control by a single phase shaped femtosecond laser pulse . Chemical Physics Letters 259, 488 (1996).
