| Date | Highlight | 
Links to more Information |
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28 December 2005
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Headline news:
The Nibbering (Max Born Institut for Nonlinear Optics
and Short Pulse Spectroscopy) and Cusanovich (University of
Arizona at Tucson) groups report on early time photoinduced
structural changes in photoactive yellow protein as deduced
from a combined polarization-sensitive infrared spectroscopic
and quantum chemical calculational approach. |
Link to original paper
|
| | One
sentence summary:
After illumination of solution phase photoactive yellow
protein the primary stages of photoinduced isomerization involve a full trans-to-cis
rearrangement of the enone-moiety of the coumaric acid chromophore. |
More
details on page of subproject 4 |
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The Berlin team members celebrating
the paper submission (left to right): Erik T. J. Nibbering, Omar F. Mohammed,
Anwar Usman, Jens Dreyer and Karsten Heyne.
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External funding by:
Cultural
department and study mission (Kulturabteilung und Studienmission) of the Embassy
of the Arabic Republic Egypt (Omar F. Mohammed).
Deutscher Akademischer Austausch Dienst (A. Usman).
 
National
Institute of Health Grant No. GM66146 (Michael A. Cusanovich).
| 
Contact: Erik T. J. Nibbering
Contact: Karsten Heyne
Contact:
Michael A. Cusanovich |
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7 October 2005
|
Headline news:
The Nibbering (Max Born Institut for Nonlinear Optics
and Short Pulse Spectroscopy) and Pines (Ben Gurion University of the Negev) groups
report on the von Grotthuss-type hopping behaviour in the exchange of a proton
between an acid and a base through a water bridge. |
 Pressemitteilung
Wasserstoff-Ionen
beim Wandern erwischt
|
|
| One sentence summary:
The transient appearance of the IR-active absorption band of the hydrated proton,
with a frequency location (2570 cm-1 in H2O and 1850 cm-1
in D2O) marking a symmetric Eigen solvation core, (H3O+)L3
(with L hydrogen accepting groups), signals a sequential, von Grotthuss-type,
proton hopping mechanism through water bridges in aqueous acid-carboxylic base
reactions. | 
Press release
Hydrogen
ions caught in the act of wandering
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 Persbericht
Waterstofionen
tijdens het verspringen door licht geflitst
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Link to original paper |
 Press
release
in arabic
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 Press
release
in hebrew
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The team members (left
to right): Dina Pines, Ehud Pines, Jens Dreyer, Omar F. Mohammed and Erik T. J.
Nibbering
|
More details on page of subproject
2 |
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External funding by:
German-Israeli Foundation for Scientific Research and Development: GIF 722/01
Cultural department and study mission (Kulturabteilung
und Studienmission) of the Embassy of the Arabic Republic Egypt (Omar F. Mohammed)
|
Contact: Erik T. J. Nibbering
Contact: Ehud Pines |
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30 September 2005
| Headline
news:
In a collaboration between the Elsaesser/Nibbering (Max Born Institut
for Nonlinear Optics and Short Pulse Spectroscopy) and Miller (University of Toronto)
groups the intertwining interactions of the O-H stretching vibration of acetic
acid dimer with fingerprint vibrations and low frequency hydrogen bond modes have
been disentangled with heterodyne detected infrared photon echo spectroscopy. | 
Link to original
paper
|
|
| One sentence summary:
Heterodyne-detected two-dimensional infrared photon echo correlation spectroscopy
on acetic acid dimer provides direct insight into how the multi-level structure
of the O-H stretching band is caused by Fermi resonances with combination overtone
levels of fingerprint vibrations and by couplings with low-frequency hydrogen
bond modes. |
More details on page of subproject
1 |
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Nils Huse and
Michael L. Cowan during measurements in August 2004.
Barry D. Bruner,
Nils Huse and Michael L. Cowan videoconferencing from Toronto.
|
Contact: Erik T. J. Nibbering
Contact: Thomas Elsaesser
Contact: R. J. Dwayne Miller
Link
to the Dwayne Miller group home page at the University of Toronto
|
| | External
funding by:
German Science Foundation: SFB450-B2 (Sonderforschungsbereich 450 "Analyse und
Steuerung ultraschneller photoinduzierter Reaktionen") 
Alexander von Humboldt Foundation (RJD Miller)
Canadian Foundation for Innovation
Natural Sciences and Engineering Research Council of Canada
Photonics Research Ontario
| 
Link to SFB450
web-page
|
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17 August 2005
| Headline
news:
In a collaboration between the Nibbering (Max Born Institut for
Nonlinear Optics and Short Pulse Spectroscopy) and Tolbert (Georgia Institute
of Technology) groups the excited state twisting rearrangement of the chromophore
of green fluorscent protein has been determined. |
Link to original paper |
| | One
sentence summary:
Polarization-sensitive spectroscopy of the chromophore
of green fluorescent protein reveals the substantial structural rearrangement
along the twisting coordinate upon electronic excitation. |
More details on page of subproject
4 |
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| | 
Erik T. J. Nibbering, Omar F. Mohammed and Anwar Usman after final business meeting
in Berlin-Charlottenburg.
Kyryl
M. Solntsev, Laren M. Tolbert and Erik T. J. Nibbering after a business meeting
at the ACS National Meeting in San Diego (March 2005). Photo also shows Ehud and
Dina Pines.
|
Contact: Erik T. J. Nibbering
Contact: Laren M. Tolbert
|
| | External
funding by:
Deutscher Akademischer Austausch Dienst (A. Usman)
Cultural
department and study mission (Kulturabteilung und Studienmission) of the Embassy
of the Arabic Republic Egypt (Omar F. Mohammed)
National
Science Foundation through Grant No. CHE-0096941 (Laren M. Tolbert).
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10 March 2005
|
Headline news:
A team of researchers at the Max Born Institut in
Berlin and the University of Toronto have solved the long standing problem whether
for liquid water O-H stretching vibrational line shapes are determined by slowly
varying hydrogen bond networks or by rapidly fluctuating and interchanging configurations.
| 
Pressemitteilung
"Das
kurze Gedächtnis des Wassers"
Persbericht
"Zo
vlug als water het geheugen verliezen" |
|
| One sentence
summary:
The hydrogen bonding network of neat liquid water (H2O)
shows rearrangements and energy redistribution on time scales much faster than
any other liquid, underlining its particular role in Nature. |
 Press
Release
"The short-term
memory of water"
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Link
to original paper
|
Press
Release
"Ultrafast Memory Loss and
Energy Redistribution in the Hydrogen Bond Network of Liquid Water" |
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What are O-H stretching and librational modes?
Examples given here.
(click on images for animated gif-files 6 MB) 
Stretching
vibration of the water molecule. An ultrashort infrared pulse excites the asymmetric
stretching vibration of the angled water molecule (red: oxygen atom, gray: hydrogen
atom). The water molecule is part of a network of hydrogen bonds between the hydrogen
and oxygen atoms on neighboring molecules (small gray symbols). Shown are the
elongations of the atoms during the stretching vibration with a vibrational period
of 10 fs. (Animation by Jens Dreyer, MBI)
Librational
motion of water. Librational motions change the relative orientation of water
molecules and - thus - contribute to the loss of structural memory in the liquid.
A period of the librational mode shown lasts approximately 40 fs. (Animation by
Jens Dreyer, MBI)
|
 
Mikrokosmos:
Das geheimnisvolle Wesen Wasser
Article
by Manon Baukhage in P.M. Magazin (in German)
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Photos 
R. J.
Dwayne Miller, Erik T. J. Nibbering, Nils Huse, Michael L. Cowan and Barry D.
Bruner during the first round of experiments in november 2003.
Nils Huse and
Michael L. Cowan during measurements in August 2004.
|
More details on page of subproject
1
|
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Michael
L. Cowan, Barry D. Bruner, R. J. Dwayne Miller, Thomas Elsaesser and Erik T. J.
Nibbering having a group meeting during the boat trip at CMDVS 2004 in Madison,
Wisconsin.
Barry D. Bruner,
Nils Huse and Michael L. Cowan videoconferencing from Toronto.
|
Contact: Erik
T. J. Nibbering
Contact: Thomas
Elsaesser
Contact: R.
J. Dwayne Miller
Link to the Dwayne Miller group home
page at the University of Toronto
|
| |
External funding by:
German Science Foundation: SFB450-B2 (Sonderforschungsbereich 450 "Analyse
und Steuerung ultraschneller photoinduzierter Reaktionen")
Alexander von Humboldt Foundation (RJD Miller)
Canadian Foundation for Innovation
Natural Sciences and Engineering Research Council of Canada
Photonics Research Ontario
|
Link to SFB450
web-page
|
| |
Dr. Nibbering
