Work Group Prof. Dr. F. Temps


Aktuelle Informationen zur Vorlesung "PC-2: Struktur der Materie" im Wintersemester 2020/21

Kiel, 27. Juli 2020:

Liebe Studierende,

Aufgrund der Corona-Pandemie wird die Vorlesung "Physikalische Chemie 2: Struktur der Materie" im Wintersemester 2020/21 als Video-Vorlesung zum Download angeboten. Für die Übungen sind Videokonferenzsitzungen mit Online Chat-Funktionalität geplant. 

Für die Vorlesung und die Übungen müssen Sie sich anmelden! Bitte benutzen Sie bei der Buchung auf OpenOlat das Passwort "PC2" und tragen Sie sich über den Menüpunkt "Umfrage" in den Kurs ein, damit wir mit den Planungen fortfahren können, Ihnen alle Informationen zur Lehrveranstaltung umgehend weiterleiten können und Sie per Email über Aktuelles informieren können.

Weitere Informationen zur Vorlesung und den weiteren Lehrveranstaltungen von Prof. Temps im WS erhalten Sie hier.

Beste Grüße, Friedrich Temps


Sebastian Megow returns with poster prize from 2nd Frontiers in Photochemistry Conference

Nassau, Bahamas, 22 - 25 February 2020:

                                                                        Winner of the poster prize in Nassau

Sebastian Megow returned with a poster prize from the 2nd Frontiers in Photochemistry Conference in Nassau, Bahamas. The high profile conference, which took place from 22 - 25 February 2020, provided a highly successful environment for intense discussion between young and senior researchers at the forefront of photochemical dynamics and solar energy harvesting research. Sebastian's poster had the title "Spin-crossover mechanism and ultrafast photodynamics of a bi-stable azopyridine nickel porphyrin". He had previously acquired a travel scholarship supporting his participation.

Congratulations, Sebastian!

Click here to read the poster abstract.


Pascal Pessier and Hendrik Böhnke receive Otto Diels and Evonik Prizes for best Master and best PhD Theses 2019

Kiel, 12 December 2019:

Congratulations to Pascal Pessier, M.Sc., and to Dr. Hendrik Böhnke! Pascal received the Otto Diels-Prize of the Chemistry Department of CAU Kiel for one of the two best Master Theses. Hendrik received the Evonik Prize for the best Ph.D. Thesis in the Academic Year 2018/19. 

Prof. Dr. Huayna Terraschke and Pascal Pessier (right).   Prof. Dr. Swetlana Schauermann with Jan Degenhardt (right).
Prof. Dr. Huayna Terraschke with Pascal Pessier (left) and Hendrik Böhnke (right).  Photos: L. Fitschen

Pascal completed his Master of Science in Chemistry with a Thesis entitled "Non-adiabatic alignment of polyatomic molecules in a molecular beam", with which he started a new research direction in our group. Hendrik built a femtosecond time-resolved transient vibrational absorption spectrometer, and applied his new instrument to investigations of important excited-state intramolecular and intermolecular proton transfer reactions, a central task in the Kiel CRC 677 "Function by Switching". His Ph.D. Thesis has the title "Electronic deactivation and reaction dynamics of H-bonded molecular systems studied by femtosecond time-resolved vibrational absorption spectroscopy".

The prizes were presented during the annual Christmas Colloquium of the Kiel Chapter of the German Chemical Society (GDCh) by Prof. Dr. Huayna Terraschke, Chair of the Kiel GDCh Chapter.


JPC Letter on "Ultrafast Photodynamics of an Azopyridine-Functionalized Iron(II) Complex" hot of the press

24 September 2019: 

Ultrafast Photodynamics of an Azopyridine-Functionalized Iron(II) Complex: Implications for the Concept of Ligand-Driven Light-Induced Spin Change

Sebastian Megow, Henrike-Leonie Fitschen, Felix Tuczek and Friedrich Temps  

J. Phys. Chem. Lett. 10, 6048 - 6054 (2019),  DOI: 10.1021/acs.jpclett.9b02083


We report on the ultrafast photodynamics of an iron(II) complex with a photoisomerizable pentadentate azo-tetrapyridylamino ligand after irradiation with ultraviolet light. The results of femtosecond transient electronic absorption spectroscopy performed on the low-spin (LS) form of the title complex show that initial excitation of the ππ* state of the azopyridine unit in the ligand at λpump = 312 nm is followed by an ultrafast intersystem crossing (ISC) that leads to the formation of a metal-centered (MC) 5T state, in competition with the intended photoswitching of the azopyridine unit. Additional measurements carried out upon excitation of the singlet metal-to-ligand charge-transfer (1MLCT) transition at λpump = 455 nm suggest that this energy transfer occurs via an MLCT state. The resulting high-spin (HS) 5T state of the complex is metastable and recovers to the LS ground state with a time constant of ∼3 ns. The implications of these observations on the ligand-driven light-induced spin change concept are discussed.   

Link to JCPL Homepage    Download PDF    Download HTML    Supplementary Information  


Temps group students win prizes for best Bachelor and Master theses in 2018

Kiel, 13 December 2018:

Congratulations to Amke Nimmrich, who won the Otto Diels-Prize of the Chemistry Department of CAU Kiel for her outstanding Master Thesis, and to Jan Degenhardt, who received a prize for his Bachelor Degree! 

Prof. Dr. Swetlana Schauermann with Amke Nimmrich (right).   Prof. Dr. Swetlana Schauermann with Jan Degenhardt (right).
Prof. Dr. Swetlana Schauermann with Amke Nimmrich (left) and Jan Degenhardt.  Photos: F. Temps

Amke and Jan both carried out their thesis works in our group. Amke wrote her Master's Thesis on the "Time-Resolved Vibrational Spectroscopy of the Nucleic Acid Chromophore Purine in Excited Singlet and Triplet States". Jan investigated the femtosecond time-resolved fluorescence decay profiles of potential ESIPT switches, a central project in the Kiel CRC "Function by Switching". Both projects provided highly valuable new insight into the photophysical and photochemical dynamics of two important classes of molecules in their electronically excited states after photoexcitation.

The two prizes for the Academic Year 2017/18 were awarded to Amke and Jan at the Christmas Colloquium of the Kiel Chapter of the German Chemical Society (GDCh) by Prof. Dr. Swetlana Schauermann, Chair of the Kiel GDCh Chapter.


Jonas' and Ole's paper on pentafluoropyridine selected by JCP as 2017 Editor's Choice Article

Kiel, 28 February 2018:

Congratulations to Jonas and Ole for having their recent paper on pentafluoropyridine selected by the editors of JCP as 2017 Editor's Choice Article!

The article, co-authored by Jonas A. Kus, Ole Hüter and Friedrich Temps, with the title "Real-time observation of multi-mode vibronic coherence in pentafluoropyridine" was published in J. Chem. Phys. 47, 013938 (2017), DOI: 10.1063/1.4983306. As it is reported, Jonas and Ole discovered that out-of-plane vibrational motion of pentafluoropyridine creates strong multi-mode vibronic coupling between the first ππ* and πσ* excited electronic states. A resulting long-lived, pronounced electronic coherence of both states was experimentally observed using femtosecond mass spectrometry and photoelectron imaging spectroscopy. Oscillations with frequencies of 72 cm-1, 144 cm-1, 251 cm-1, and 281 cm-1 could be followed in time for more than 10 picoseconds.

Click here to see the list of the 2017 JCP Editor's Choice Articles, here to download the paper from the JCP website, or here to download the 2017 JCP Editor's Choice Articles booklet as pdf. 


Dennis Bank's and Hendrik Böhnke's poster presentations upgraded to talks at major conferences

Kiel, 24 July 2017:

Dennis Bank and Hendrik Böhnke both had their posters, which they had submitted for presentation at two important international symposia, unexpectedly upgraded to talks by the international organizing committees of the conferences! Dennis reported on his study of the "Ultrafast Photoisomerization Dynamics of Heterodiazocines upon S1(nπ*) Photoexcitation by Femtosecond Electronic Absorption Spectroscopy" at ICP2017, the 28th International Conference on Photochemistry in Strasbourg from 16 - 21 July 2017. Hendrik gave his talk entitled "Following the Ultrafast Dynamics of a Bistable Intramolecular H-Transfer Switch" at TRVS2017, the Time Resolved Vibrational Spectroscopy Meeting 2017 in Cambridge, UK, which also took place from 16 - 21 July 2017. More work, but more honor for both!  

Click to read Dennis' and Hendrik's abstracts.


Ole Hüter receives Familie Schindler Prize 2016

Kiel, 06 July 2017:

Congratulations to Dr. Ole Hüter for the 2016 Familie Schindler Prize for an outstanding Ph.D. Thesis in the field of Physical Chemistry!

Ole obtained his Ph.D. in our group in 2016 with a thesis on the "Femtochemistry of Vibronically Coupled Excited Electronic States of Carbonyl Compounds and Highly Fluorinated Benzene". During his work, he set up a highly versatile combined femtosecond time-of-flight mass spectrometer (fsTOF-MS) and photoelectron imaging (fsPEI) spectrometer for investigations of the ultrafast vibronic dynamics of electronically excited organic molecules in a pulsed supersonic molecular beam. He then used both techniques to study the photodissociation dynamics of acetone and other carbonyl compounds after excitation to the S1 (nπ*) state. He could show that the S1-excited molecules readily absorb another UV photon to reach high-lying Rydberg states, due to the huge absorption cross sections of those Rydberg states, and then quickly undergo dissociation. This process likely explains the alleged fast dissociation of acetone from the S1 state observed previously by Sergej Dziarzhytski by photofragment imaging in our group and in other laboratories. Ole also identified the origin of pronounced long-lived coherent dynamics of the TOF-MS and PEI signals of pentafluorobenzene (PFB). According to his results, the observed oscillations orginate from strong vibronic coupling of the optically bright ππ* state with the πσ* state at about 1 eV higher.

His work has already led to four valuable publications in J. Chem. Phys. and the like, with some more papers being on the way.


Sebastian Megow gave invited talk at DPG Spring Meeting

Mainz, 07 March 2017:  

Sebastian Megow's presentation at the DPG spring meeting 2017 in Mainz was upgraded by the organizers to an invited main talk due to the novelty and the huge interest in switching the spin state of transition metal complexes in solution at room temperature:

"Ultrafast dynamics of a magnetically bistable molecular switch by fs transient absorption spectroscopy"

Sebastian Megow*, Julia Bahrenburg*, Hendrik Böhnke*, Mats Bohnsack*, Mark Dittner*, Marcel Dommaschk**, Rainer Herges**, and Friedrich Temps* 
*Institute of Physical Chemistry and **Otto-Diels-Institute of Organic Chemistry, Christian-Albrechts-University Kiel 


Zwei Studenten und eine Tasse Kaffee
Photo-induced spin-state switching reactions of the azypridine Ni-porphyrin.   


The paper presented first results of our femtosecond studies of the photoreversible switching dynamics between the trans or low-spin configuration and the cis or high-spin configuration of an azopyridine-functionalized nickel-porphyrin, the so-called "Ni(II)-porphyrin record player" developed by our colleagues in the Otto Diels Institute of Organic Chemistry at CAU Kiel. The results show that the dynamics in both directions are determined by transitions between the Ni(d2) and Ni(d,d) excited states. A second highlight was the quantum yield determination for the switching from high-spin to low spin. 

Femtosecond spectroscopy at this level of complexity requires the collaboration of a large number of researchers with different expertise. This is reflected by the long list of co-authors. 

The abstract of the paper is accessible here in the DPG Verhandlungen. 

A second talk was given by Jonas Kus (co-authored by Jonas, Ole Hüter and Friedrich Temps), who reported on "Long-lived coherence with multiple vibrational frequencies in pentafluoropyridine as a probe of ππ*- πσ* vibronic coupling" (click here to read the abstract). 


XMP paper selected as Editor's Research Highlight in Focus on Chemistry

Kiel, 30 January 2017:

     molecules logo

We happily report that the chief editor of MDPI has selected our recent paper in Molecules, vol. 22, p. 160 (2017) by Katharina Röttger, Rebecca Stellmacher, Mayra C. Stuhldreier and Friedrich Temps on the

Ultrafast Electronic Deactivation Dynamics of Xanthosine Monophosphate

as Research Highlight in the January 30 edition of Focus on Chemistry.

Abstract: Ultrafast energy dissipation is a crucial factor for the photostability of DNA and RNA, but even some of the key electronic deactivation pathways in monomeric nucleic acid building stones are still controversial. Here, we report on the excited-state dynamics of the rare nucleotide xanthosine monophosphate as a function of deprotonation state (XMP vs. XMP ) and excitation wavelength ( λpump =  278–243 nm) by femtosecond time-resolved fluorescence and absorption spectroscopy. We show that the predominating relaxation channel leads to a return of the photo-excited molecules to the electronic ground state in τ ∼ 1 ps. The mechanism likely involves an out-of-plane deformation of the five-membered ring, different from the main electronic deactivation pathways in the canonical purine bases adenine and guanine. The results are discussed in terms of the structural and electronic differences of XMP compared to the canonical nucleotides.

To read the full article see: DOI 10.3390/molecules22010160 


Cover article on pyrimidine bases in Faraday Discussions on Ultrafast Imaging of Photochemical Dynamics

06 January 2017: 

   Faraday Discussion 194  
"Probing the excited state relaxation dynamics of pyrimidine nucleosides in chloroform solution"
Katharina Röttger, Hugo J. B. Marroux, Hendrik Böhnke,
David T. J. Morris, Angus T. Voice, Friedrich Temps, 
Gareth M. Roberts and Andrew J. Orr-Ewing
Faraday Discuss. 194, 683 - 708 (2016).


Abstract     Download PDF     View Full Size Image (59 KB)


Congratulations to Pascal Pessier for his Bachelor Prize

Kiel, 8 December 2016:

Congratulations to Felix Hartmann, Tim Christopher Haas, Pascal Pessier und Jennifer Müller, who won this year's prizes for the best Bachelor Degrees in the Kiel Chemistry Department of the Academic Year 2015/16. Of the four, Pascal wrote his thesis in our group on the "Synthesis and Characterization of Azobenzene-Functionalized Gold Nanoparticles." He his now continuing in the Master's programme at Kiel with focus on Physical Chemistry. We wish him success and good luck for the future!  


Physical Chemistry at the 18th JCF Spring Symposium 2016 in Kiel

Kiel, 16 - 19 March 2016:

The 18th JCF Spring Symposium is taking place at Christian-Albrechts-University Kiel from 16 - 19 March 2016. The Symposium is organized by the Kiel Group of the Young Chemist's Section (JCF) of the German Chemical Society (GDCh) by Ph.D. student Uta C. Stange of the Institute of Physical Chemistry and her team. 

This year's Symposium features three Invited Talks in Physical Chemistry: Prof. Dr. Claire Vallance, Oxford University, UK, presents "An Ultra-Fast Camera for Chemical Imaging", former Kiel Ph.D. student Dr. Nina K. Schwalb, Bayer Technology Services, Germany, talks about her views on "A Physical Chemist’s Journey through Time – Insights into the Professional Career Paths in a Global Enterprise", and Prof. Dr. Jessica M. Anna, University of Pennsylvania, U.S.A., reports on Tracking Ultrafast Photoinitiated Processes of Multichromophoric Assemblies Via Two-Dimensional Optical Spectroscopy". 

To view the complete programme, click the following link to the homepage of the 18th JCF Spring Symposium 2016


JPC Letter on "Femtosecond Dynamics of Azobenzene on Gold Nanoparticles" hot of the press

09 March 2016: 

Femtosecond Time-Resolved Dynamics of trans-Azobenzene on Gold Nanoparticles

Anja Köhntopp, Mark Dittner and Friedrich Temps  

J. Phys. Chem. Lett. 7, 1088 - 1095 (2016),  DOI: 10.1021/acs.jpclett.6b00102

Azobenzene on Gold Nanoparticle

We report a first femtosecond time-resolved transient absorption study of the photoinduced ultrafast dynamics of trans-azobenzene (AB) on gold nanoparticles (AuNPs). The observed changes in optical density following excitation at λ = 357 nm were analyzed by using temperature-dependent Mie theory and by Lorentzian band fitting to disentangle the ultrafast relaxation of the local surface plasmon resonance (LSPR) excitation of the Au core and the electronic deactivation of the attached AB ligands. The analysis of the dynamics associated with the AB photochrome yielded lifetime constants of τ1 = 1.2 ± 0.2 ps and τ2 = 4.7 ± 1.1 ps. Both values together indicate surprisingly little difference in the dynamics of the AB ligand on the AuNPs vs in solution. Our results thus highlight the extraordinarily efficient electronic decoupling of the azo chromophore and the Au core by the alkyl linker chain.    

Link to JCPL Homepage    Download PDF    Download HTML    Supplementary Information  


New SFB 677 video podcast online: "Ultrafast Molecular Switches Caught in the Act"

Kiel, 15 December 2015:

Photochemically driven molecular switches are extremely fast: Typically, the switching process takes just 1 picosecond (10‑12 s). To understand the underlying molecular mechanisms, it is necessary therefore to investigate them on the time scale of femtoseconds (10‑15 s). Experimentally, this can be done with modern methods of ultrafast spectroscopy, as applied in our work group. In complementary work, the molecular switching dynamics is simulated theoretically in the group of Professor Bernd Hartke. A new video podcast by the Kiel CRC 677 "Function by Switching" illustrates our approach:  


SFB video podcast
Click on image to start the video in a new page.


In combined studies of this kind within CRC 677, the photochemical mechanisms of basic switches like azobenzenes and furylfulgides have been analyzed in high details. This, in turn, allows us to systematically improve these molecules, i.e. to develop molecular systems that can be switched from one state to the other more selectively, more rapidly, more efficiently and more robustly. These achievements directly translate to improved applications of the switches, for example in functional materials or as tiny actuators and motors in molecular machines. The video podcast illustrates one of our improvements: An additional bridge between the two phenyl rings of azobenzene improves its switching properties dramatically, by shortening the molecular pathways from one state to the other, and by eliminating other molecular movements that would reduce the switching efficiency. Additionally, the bridge separates the excitation light wavelengths for the forward and backward switching directions. 


Friedrich Temps receives Wilhelm Jost Medal

Göttingen, 10 December 2015:

       F. Wilhelm Jost
F. Wilhelm Jost

Friedrich Temps received the Wilhelm Jost Medal of the Academy of Sciences Göttingen for the 2015 Wilhelm Jost Memorial Lecture

"Ultrafast Light-Induced Transformations in Molecular Switches and DNA Building Blocks"   

The Wilhelm Jost Memorial Lecture and Medal is awarded by the Academy of Sciences Göttingen and jointly by the Deutsche Bunsengesellschaft für Physikalische Chemie to commemorate the many scientific achievements and merits of F. Wilhelm Jost (1903 - 1968). The Lecture is traditionally given at the former work places of W. Jost, in Halle, Berlin, Hannover, Leipzig, Marburg, Darmstadt and Göttingen. The medal is presented after the last lecture in Göttingen.

Links to lecture scheduleAcademy of Sciences Göttingenlist of previous Jost lecturerslarger photo of Jost Medal.


Congratulations to Carsten Schröder and Niklas Helle for their Bachelor Prizes

Kiel, 10 December 2015:

     Niklas Helle
Niklas Helle
        Carsten Schröder
Carsten Schröder

Congratulations to Carsten Schröder, Niklas Helle and Michael Alexander Braun, who won this year's prizes for the best Bachelor Degrees in the Kiel Chemistry Department of the Academic Year 2014/15. 

Carsten and Niklas both carried out their thesis works in our group. Carsten wrote his Thesis on the "Investigation of the Ultrafast Dynamics of Cinnamic Acid Derivatives by Femtosecond Time-Resolved Fluorescence Spectroscopy". Niklas worked on "Femtosecond Time-Resolved Mass Spectrometry and Photoelectron Imaging of Cyclohexanone". Both papers provided highly valuable new insight into the photophysical and photochemical dynamics of important classes of electronically excited molecules.   


CAU awards Germany scholarships

Kiel, 28 October 2015:  

CAU president Prof. Lutz Kipp and vice-president Prof. Ilka Parchmann announced the winners of the 2015/16 Germany Scholarships (Deutschlandstipendium) at Christian-Albrechts-University in a festive ceremony at the Science Center. This year marks the third in which we contributed with funding for a one-year stipend, open to all academic disciplines in the tradition of CAU as "universitas".  


Germany Scholarships 2015 Group Photo
Photo: Christina Kloodt  


"Affording their studies has become very difficult for many students in recent years, as little if any time remains since the conversion to the Bachelor/Master system for financing their living expenses by working besides their studies during the semester or in the semester breaks. A Germany Scholarship is not only a help, but also a special recognition and motivation. We are extraordinarily glad to be able to support and honor our best, most committed and engaged young talent at CAU in this way."

The Germany Scholarship provides financial and non-material support to high-achieving and committed students at German universities from all over the world. Businesses, foundations and private individuals sponsor young talent with a pledge of 50 % of the cost of a stipend per year. The Federal Government matches each donation with the other 50 %. 

Click here to view the above photograph in larger format, click here for the official CAU press release.


Cover article on G∙C base pair in Angew. Chem. hot of the press

13 October 2015: 

"Ultraviolet Absorption Induces Hydrogen-Atom Transfer in G∙C Watson-Crick" DNA Base Pairs in Solution"
Katharina Röttger, Hugo J. B. Marroux, Michael P. Grubb,
Philip M. Coulter, Hendrik Böhnke, Alexander S. Henderson,
M. Carmen Galan, Friedrich Temps, Andrew J. Orr-Ewing
and Gareth M. Roberts
Angew. Chem. Int. Ed. 54, 14719 - 14712 (2015).


Abstract     Download PDF     Supplementary Information     Enlarged Cover     CAU Press Release


Welcome to our new group homepage!

Kiel, 01 October 2015:  

Our new group homepage finally went online today!  It offers a fresh new look and also much more information on our research. We hope you'll enjoy it and look forward to your comments!  


2015 Group Photo
2015 group photo.  From left to right, first row:  Alexander Thrun, Rebecca Marschan,
Elisabeth Moshake,  Dennis Bank,  Jonas Kus,   Sebastian Schatz,   Mats Bohnsack,
Hendrik Böhnke,  second row: Tanja Sharif, Uta Corinna Stange, Anja Köhntopp, third
row: Sebastian Megow, Ole Hüter, Shuangqing Wang.                       Photo: AK Temps


Click here to download the above photograph in larger format or here to download our "Laser Cats" photo.


PS: We tried our best to fix all broken links which we could find after publication of these pages.  Please email: if you find more.


Wilhelm Jost Memorial Lecture 2015 to be given by Prof. F. Temps

Göttingen and Kiel, 01 July 2015:

The 2015 Wilhelm Jost Memorial Lecture sponsored by the Academy of Sciences Göttingen on proposition by the Deutsche Bunsengesellschaft für Physikalische Chemie is traditionally given at the former work places of W. Jost and additional institutions to commemorate his many achievements and merits.  

The title of the 2015 Wilhelm Jost Lecture to be given by F. Temps is

"Ultrafast Light-Induced Transformations in Molecular Switches and DNA Building Blocks"  


Lecture Calendar:

Date University          Date University
18.11.2015 Martin Luther University Halle    19.11.2015  University of Leipzig 
25.11.2015  Technical University Darmstadt    01.12.2015 Technical University Kaiserslautern 
02.12.2015  Philipps University Marburg    03.12.2015  Leibniz University Hannover 
09.12.2015  Humboldt University Berlin    10.12.2015  Georg August University Göttingen* 
*lecture with modified title 


Link to the Academy of Sciences Göttingen, and link to the list of previous Wilhelm Jost Lecturers.


Annual Prize of the MNF-Förderverein goes to JCF-Kiel

Kiel, 01 July 2015:

Prize winners of the MNF Förderverein.
The winners of the 2015 award of the MNF-Förderverein with Prof. Dr. J. Grotemeyer
Photo: Sebastian Maas, (c) CAU Kiel


The annual prize of the MNF-Förderverein has been received by Patrick Comdühr (Department of Mathematics), Rebecca Horbert (Department of Pharmacy), Tim Wiegmann (Department of Physics) and the speaker team of the Young Chemists Association Kiel (JCF) Uta Corinna Stange, Katharina Uebele and Steve Waitschat (Department of Chemistry). The prize recognizes extraordinary student engagement and commitment in society besides university affairs.

Click here for the CAU press release.

Click here to download the above photograph in larger format.


Julia Bahrenburg receives Familie Schindler Prize

Kiel, 01 July 2015:

Dr. Julia Bahrenburg and Dr. Julian Linshöft received the 2015 Familie Schindler Prize for their outstanding Ph.D. Theses in the field of Physical Chemistry and for applying Physical Chemistry methods.


Dr. Julian Linshöft, Dr. Julia Bahrenburg and Prof. Dr. J. Grotemeyer
Dr. Julian Linshöft, Dr. Julia Bahrenburg, Prof. Dr. J. Grotemeyer
Photo: Sebastian Maas, (c) CAU KIel


Julia Bahrenburg obtained her Ph.D. in the Temps group in 2014 with a thesis entitled "Ultrafast Photochemical Dynamics of Azobenzenes Affected by Intra- and Intermolecular Interactions and of a Proton Transfer Switch". She studied the photoswitching dynamics of Disperse Red 1 in solution and linked to a side chain of PBMA colloids in comparison to an azobenzene cross-linked into the main chain of the polymer. In addition, she studied the influence of chromophore-chromophore couplings in multi-azobenzenes, the dynamics of the azobenzene-porphyrine spin switch developed in the group of Prof. Herges, and she initiated the investigation of H atom / proton transfer photoswitches in our group, which have led to the new sub-project A7 in the CRC 677 "Function by Switching". She has since accepted a top level R&D position at DLR in Stuttgart. Julian Linshöft received his Ph.D. in 2014 with a thesis on "Main Group Heterocycles for Semiconducting Polymers"  in the group of Prof. Anne Staubitz in the Otto Diels-Institute of Organic Chemistry.

Click here for the CAU press release.

Click here to download the above photograph in larger format.


SFB 677 "Function by Switching" funded for third period

Kiel, 22 May 2015:


The German Research Foundation (DFG) has announced that it will continue to fund the Collaborative Research Centre (Sonderforschungsbereich) 677 "Function by Switching" at CAU Kiel for a third period until 2019 with another 8.9 million EUR. In one continuing (A1) and one new project (A7) in our group, we investigate the dynamics of molecular switches in solution and in functional photoresponsive environments and systems (e.g. polymer colloids, polymer films and monolayers on quartz surfaces and on nanoparticles). To achive our ambitious goals, we use state-of-the-art femto- and picosecond time-resolved optical spectroscopies (e.g. broadband femtosecond transient absorption, fs fluorescence up-conversion and fs broadband fluorescence) in the VIS and UV regions between 220 - 800 nm. In addition, we recently complemented our ultrafast instrumentation for the third CRC funding period by a new femtosecond UV pump / IR probe spectrometer allowing for detection in the IR between 900 - 3900 cm-1

The CRC encompasses 16 scientific sub-projects, one Public Outreach project and an integrated Graduate Research Training Group. Work groups from the Chemistry, Physics, and Materials Science departments at CAU Kiel collaborate closely to develop and investigate tiny light-driven molecular switches for realizing new functions and functional materials. The CRC has been established in 2007. The speaker is Prof. Rainer Herges of the Otto Diels Institute of Organic Chemistry. 

Our continuing project A1 is led jointly by Prof. Bernd Hartke, Dr. Falk Renth, and Prof. Temps, our new project A07 is led jointly by Prof. TempsProf. Ulrich Lüning, and Prof. Bernd Hartke

Please contact us for questions and ask for available Ph.D. and Master/Diploma Thesis projects.

Click here for the CAU press release.

Click here for the SFB 677 homepage.

Click here for more information on project A1: "Ultrafast Dynamics of Photo-induced Switching Processes".

Click here for more information on project A7: "Dynamics of H-Transfer Switches".


Katharina Röttger receives prestigous Albert-Weller-Prize

Cologne, 30 September 2014:

Photo: Dr. Sebastian Hanft
(c) University of Cologne

Dr. Katharina Röttger, Institute of Physical Chemistry of CAU Kiel, received the prestigious Albert Weller-Prize of the Gesellschaft Deutscher Chemiker (GDCh) and the Deutsche Bunsengesellschaft für Physikalische Chemie (DBG) for her outstanding work on the photophysical and photochemical dynamics of electronically excited DNA building blocks. The prize was presented at the 24th GDCh Lecture Conference on Photochemistry by Prof. Dr. Axel Griesbeck, chair of the GDCh Photochemistry Division.

Katharina earned her Ph. D. degree at CAU Kiel in 2013 with a Thesis on the "Ultrafast Deactivation Dynamics of Structurally Modified and Hydrogen Bonded DNA and RNA Building Blocks". She previously already received the CAU Faculty Prize for her Thesis. In 2015, she will start postdoctoral research at the University of Bristol, UK, where she plans to work with Prof. Andrew Orr-Ewing.

Click here for the CAU press release with further information.


Chemical Communication hot of the press (published on the web 15 July 2014)

15 July 2014: 


Photoisomerisation and Ligand-Controlled Reversible Aggregation of Azobenzene-Functionalised Gold Nanoparticles

Anja Köhntopp, Alexandra Dabrowski, Michal Malicki and Friedrich Temps  

Chem. Commun. 50, 10105 - 10107 (2014),  DOI: 10.1039/C4CC02250E 



The photochemical behaviour of functionalised gold nanoparticles (AuNPs) carrying azobenzenethiolate–alkylthiolate monolayers was investigated. Repeated transcis andcistrans isomerisation cycles could be performed in all cases with high efficiency. Reversible photoinduced aggregation was observed when azothiolates with long alkyl spacers (≥C7) were combined with short (C5) alkylthiolate coligands. The choice of a coligand thus offers control over the aggregation properties of the nanoparticles.

Abstract on ChemComm Homepage    Download PDF    Supplementary Information (1219K)


Katharina Röttger receives MNF Faculty Prize 2014

Bordesholm, 13 July 2014:

Photo: Claudia Eulitz, (c) CAU

At the Universitätstag 2014 in Bordesholm, Dr. Katharina Röttger was awarded by CAU President Prof. Dr. Lutz Kipp with the Faculty Prize 2014 of the Faculty of Mathematics and Natural Sciences for her outstanding Ph.D. Thesis. 

Katharina received her Ph.D. degree in 2013. The title of her thesis was "Ultrafast Deactivation Dynamics of Structurally Modified and Hydrogen Bonded DNA and RNA Building Blocks". In her thank-you-speech, she noted the special and stimulating atmosphere in the workgroup and thanked all workgroup members.

Congratulations, Katharina!

Click here for the CAU press release with further information.


Uta Corinna Stange wins Poster Prize at Bunsentagung 2014

Hamburg, 31 May 2014:

Uta C. Stange

Uta Corinna returned with a poster prize from the annual Bunsentagung 2014 in Hamburg, where she had presented a paper entitled "Temperature-Dependent Femtosecond Spectroscopy Reveals Energy Barriers in Ultrafast Electronic Deactivation."  



Click here to read the poster abstract.


Uta Corinna Stange elected to new chair of the JCF board Kiel

Kiel, 20 February 2014:

Uta Corinna Stange,  who is presently in her second year as Ph.D. student in our group, has been elected as the new chairperson of JCF-Kiel, the Kiel chapter of the Young Scientists Association of the German Chemical Society (GDCh). As former vice-chair, she now follows Katharina Holz. Sebastian Beil is the new vice-chair, Steve Waitschat the new treasurer.  Kiel-JCF has been responsible for many successful projects in recent years, and the new board already has plenty of ideas for more to come ...

Visit the Kiel-JCF website for more information!