June 27th, 2018  new paper in  ➜ Phys. Chem. Chem. Phys.

We combine fluorescence upconversion and a high-pressure cell to study the pressure dependence of the photodynamics of two systems.

Application of kilobar pressure leads to changes in (sub)picosecond emission dynamics, depending on the mechanism at work.

May 10th to 13th, 2018

The Bunsen Society Meeting of 2018 is held in Hannover,
with "Kinetics in the real world" as main topic.

We present dynamics studies with TCSPC, fluorescence upconversion, and transient absorption on compounds in solution and bound to fibrils.

May 1st, 2018  new paper in  ➜ Applied Optics

Laguerre-Gaussian laser beams have remarkable properties such as an optical orbital angular momentum or a singularity in the beam's center.

In this paper (highlighted as Editors' Pick in Applied Optics), we combine such optical vortices with temporal femtosecond pulse shaping.

March 9th, 2018  Congratulations to Dr. Tom Bolze !

Tom Bolze has successfully completed his PhD project all about fluorescing salts and twisted laser pulses.

Best wishes from all members of the team on NC 6
and thank you for the nice work and the great time !

March 4th to 9th, 2018

This year's Spring Meeting of the German Physical Society brings us to the Friedrich-Alexander University in Erlangen.

As usual, we present our most recent results, this time in six conference contributions.

January 5th, 2018  new paper in  ➜ ChemPhysChem

Most tetrazolium compounds are not fluorescent, but PTC is for several hundred picoseconds, as we disclose in ultrafast fluorescence and transient absorption studies in various alcohols. The non-radiative rate of PTC is sensitive to solvent polarity whereas the radiative one is not.

December 20th, 2017  new Research Training Group

Good news at the end of the year: the DFG will fund the establishment of the new Research Training Group "Confinement-controlled Chemistry". Starting in 2018, our group and 9 others will perform collaborative research on this exciting topic!

press release of the DFG and press release of the RUB (in German only)

November 15th, 2017  new paper in  ➜ Dalton Transactions

In a joint publication with the groups of Nils Metzler-Nolte and of
Julia Bandow, a series of novel Re(I)(CO)3–NHC complexes is
presented which provide strong luminescence as well as high
antibacterial activity.

October 4th to 7th, 2017

At the "International Conference on Spectroscopy of Biomolecules and Advanced Materials", our recent work on formazans, carbenes, and tetrazolinyl radicals is presented in an invited lecture.

The meeting is organized by Christian College Chengannur in India.

October 2nd, 2017  new paper in  ➜ Nachrichten aus der Chemie

Reaction steps of complex reactions in the liquid phase can be deciphered by variation of the solvent environment.

Together with colleagues from RESOLV, we show this for diphenylcarbene by ultrafast spectroscopy, matrix isolation, and advanced simulation tools.

August 29th, 2017  new paper in  ➜ Optics Express

How to get collinearly propagating mirror images of a laser pulse with arbitrary polarization by only utilizing mirrors and beamsplitters?

Our publication on the generation of these "laser-pulse enantiomers" has been selected as Editors' Pick in Optics Express.

June 18th to 22nd, 2017

Our recent experiments on carbenes in solvent mixtures are part of the "International Symposium on Reactive Intermediates and Unusual Molecules", held in Sorrento in Italy.

The conference is the perfect event to learn and exchange ideas on photochemical reactions with short-lived intermediates and competing reaction paths.

May 25th to 27th, 2017

Bunsen Society Meeting 2017 in Kaiserslautern: good weather, fine food, a perfectly organized meeting and of course a lot of fascinating research!

We also contributed again, e.g. this time with our studies on the ultrafast dynamics of triazenes.

April 21st, 2017  new paper in  ➜ J. Phys. Chem. Lett.

Berenil is a triazene compound with an extremely low fluorescence quantum yield, even when it is bound to biomolecules.

Together with colleagues from Theoretical Chemistry and employing fluorescence upconversion, we could unveil why this is the case.

March 13th to 17th, 2017

Bastian, Johannes, and Kevin participate in the 12th Workshop on Ultrafast Physics and Quantum Control in Saalbach-Hinterglemm in Austria.

The competing attraction to latest research highlights in ultrafast science surely was the opportunity to ski.

March 6th to 10th, 2017

All group members attend the Spring Meeting of the German Physical Society which takes place at the University of Mainz.

The results of our latest experiments are presented in 4 talks (Lena, Bastian, Tom, Johannes) and 2 poster contributions (Kevin, Jan).

December 8th, 2016  

Patrick presents our recent results on tetrazolium salts and on carbenes
in an invited talk at "Photonics 2016".

The biennial conference is this time held at the Indian Institute of
Technology Kanpur.

November 29th, 2016  new publication in  ➜ PCCP

When trihalide anions in solution interact with femtosecond pulses, pronounced wave-packet dynamics and bond cleavage can be initiated.

For six trihalide anions from point groups D∞h and C∞v, we identify the fragmentation pattern from the frequencies of the wavepacket.

October 6th, 2016  new paper in  ➜ Nature Communications

Photochemistry in solution often involves reactions that may comprise intermediates capturing a solvent molecule. For diphenylcarbene, the decision-maker is not the nearest solvent molecule but its neighbor.

The results of our research are also featured in a  ➜ Press Release.

September 19th, 2016  works outing

This year's works outing took place in Essen. Framed by a convivial brunch and a dinner with tartes flambées, we also did some "team building" by successfully completing an Escape Room Game.

July 17th to 22nd, 2016  UP XX

Lena and Johannes are presenting their projects at the "Ultrafast Phenomena XX" conference in Santa Fe, New Mexico.

Our group has (co-)authored three contributions, covering the ultrafast photochemistry of carbenes, triazenes, and β-diketones.

April 4th, 2016  ...we celebrate with Dr. Johannes Knorr !

Johannes Knorr has successfully passed his thesis defense.

Our workgroup cordially congratulates Johannes on completing
his doctorate, and we are happy that he will further support us in forthcoming projects !

February 29th to March 4th, 2016

The whole group is at the Spring Meeting of the German Physical Society in Hannover, with contributions presented in 2 talks and 4 posters.

Hottest topic is of course the amazing detection of gravitational waves, however we stayed with electromagnetic ones...

December 23rd, 2015new publication in  ➜ Structural Dynamics

AID is a molecule that in the ground-state is an exocyclic enol whereas
it is an endocyclic enol in the excited state.

This is caused by an intramolecular proton transfer which proceeds
within only 160 fs and is initiated by UV excitation.

September 4th, 2015 new publication   ➜ article in ChemPhysChem

Tetrazolium salts are widely used in enzyme assays, but they also exhibit a rich photochemistry. Upon UV irradiation, the tetrazolium ion turns into the tetrazolinyl radical via two intermediates on an ultrafast time scale. The solvent’s polarity governs the rate of formation.

August 26th, 2015   new publication   

Two dimensions provide more insight than one:

This review on multidimensional electronic spectroscopy presents latest techniques for deciphering ultrafast photochemical reactions.

The article in Angewandte Chemie is available in ➜ German and ➜ English.

July 12th to 17th, 2015   Femto12

For the 12th time, the biannual international conference Femtochemistry will bring together "ultrafast" researchers, this time in Hamburg.

We are proud that we are contributing to four presentations, spanning from identification of reaction intermediates to sensitive polarimetry.

Bunsentagung 2015

May 14th to 16th, 2015   Bunsen Society Meeting in Bochum !

The 114th General Assembly of the German Bunsen Society takes please here in Bochum at the Audimax!

Our group is looking forward to more than 500 colleagues and their current research in the field of Physical Chemistry.

March 23rd to 27th, 2015  

Also this year, the group takes part in the Spring Meeting of the German Physical Society, which is held in Heidelberg.

Our group has co-authored 7 research contributions which are presented in the "Molecular Physics" division.

UP proceedings

February 25th, 2015   new publications

Two of our studies were part of the conference "Ultrafast Phenomena XIX" in 2014.

The conference proceedings papers on the Wolff rearrangement in the gas phase (➜article) and the discrimination of achiral from racemic solutions (➜article) have now been published in Springer Proceedings in Physics, volume 162.

unsymmetric beta-Diketone

February 10th, 2015   new publication   ➜ article in PCCP

In symmetric β-diketones, the two enolic forms due to keto-enol-tautomerism are equivalent, whereas in unsymmetric ones they are different.

In transient absorption, this difference is also evident, already during the first picosecond after photoexcitation.

Photonics West 2015

February 7th to 12th, 2015

At the international conference Photonics West 2015 in San Francisco,
our experiments are presented as an invited talk within the symposium
"Ultrafast Phenomena and Nanophotonics XIX".


February 4th, 2015   new publication   ➜ article in PCCP

How to distinguish whether a solution contains only achiral molecules or is a racemic mixture? CD and ORD alone will not tell you the answer.

Triggering an asymmetric photoreaction with an intense laser, you will know within seconds by virtue of a measurable enantiomeric excess.

January 5th, 2015

Lena Grimmelsmann has joined our team and will perform research
on photochemical molecular dynamics in solution for her PhD project.

Bienvenue and a lot of fun with laser spectroscopy!

November 20th, 2014   new publication   ➜ article in J. Phys. Chem. A

Isomerize, ionize, or just relax back to the ground state? The merocyanine molecules under study can follow these three competing reaction pathways.

By femtosecond pulse shaping of the intense excitation pulses, we can control the relative amounts in the different reaction channels.

October 9th, 2014   new publication   ➜ article in JACS

In solution, β-diketones prevalently exist in the chelated enol form.
But what happens upon ultraviolet excitation and how fast?

By transient absorption in the UV, we could show that non-chelated rotamers are formed in nonradiative processes within less than a nanosecond.

September 1st, 2014

Dr. Christian Spies starts his new position as a postdoctoral
researcher in our group today.

A warm welcome and a good start !

July 7th to 11th, 2014

Our group is represented with two contributions at the conference
"Ultrafast Phenomena XIX", which is held in Japan this time.

Andreas Steinbacher and Johannes Knorr have made the exciting
journey to the typhoon-ridden island Okinawa.

June 11th, 2014  two new publications in Journal of Chemical Physics

In a comprehensive study, jointly done with the groups of T. Brixner
and B. Engels in Würzburg, the ultrafast reaction dynamics and
coherent wavepacket motion in merocyanines could be elucidated
experimentally ( ➜ article I ) and theoretically ( ➜ article II ).

June 10th, 2014  new publication   ➜ article in Journal of Physics B

How do the signals in pump-probe experiments depend on the polarization of the laser pulses, and how can these contributions be isolated?

Our recent paper discusses possibilities how this can be realized, even for laser pulses whose polarization exhibits arbirtrary ellipticity.

May 29th to 31st, 2014  

The group is participating in the 2011 Bunsen Society Meeting.

Our recent experiments on ultrafast dynamics and subsequent
reactions of tetrazolium salts are presented in an oral contribution.

April 22nd, 2014  ...from now on: Dr. Philipp Rudolf !

Philipp Rudolf has successfully defended his dissertation.

Thanks a lot for the pleasant and efficient collaboration,
the whole group congratulates and wishes all the best!

March 19th, 2014  new publication   ➜ PNAS article

Which modes are involved when a molecule turns into another one?
Our collaborative study (with the groups of T. Brixner and B. Engels from Würzburg) directly reveals what happens via 3D electronic spectroscopy!

➜ Press release from University of Würzburg

March 17th to 21st, 2014

Spring Meeting of the German Physical Society (this time in Berlin), in which the Nuernberger group traditionally participates.

Our group has a total of 9 contributions (6 talks, 3 posters) in the program of the "Molecular Physics Division".

March 12th, 2014  new publication   ➜ PCCP article

A Wolff rearrangement reaction proceeds differently in different solvents, but what happens in vacuum?

Our studies show: in diazo-Meldrum's acid, two rearrangement reactions occur subsequently within only a few picoseconds!

February 17th to 19th, 2014

The first RESOLV Klausurtagung takes place at the Seeon Monastery, with the researchers discussing ongoing and future collaborations.

Patrick Nürnberger presents an overview of the spectroscopic techniques that the RUB Ultrafast Photochemistry Group has experience with.

February 6th, 2014

Patrick Nürnberger gives a lecture about our work on multidimensional spectroscopy at the Leibniz-Institute of Photonic Technology in Jena.

The seminar talk is given upon invitation by the Jena Student Chapter of the Optical Society of America.

January 30th, 2014

Workshop of all research groups from Research Area A in RESOLV.

Johannes Knorr presents a short talk and a poster about our recent results on light-induced ultrafast carbon monoxide release in aqueous solution.   ➜ J. Phys. Chem. Lett. 4, 596 (2013)

January 15th, 2014

At the New Year's Reception of the Excellence Cluster RESOLV, the Nürnberger group has presented its work to the other research groups.

The subsequent discussion revealed once more various beneficial links to the multifaceted research projects within the excellence cluster.

January 6th, 2014

The Nürnberger Research Group is now officially at the RUB !

We are grateful to the PC and the whole Chemistry Department at the Universit of Würzburg for the immense support and a really great time.