20.07.2020 - Polymer friendly FSRM

Femtosecond stimulated Raman microscopy (FSRM) is a novel imaging technique developed in our lab. We presently use it to investigate static and dynamic properties of polymers. In the course of this, we observed photo-damages of some samples caused by the FSRM light source (marked circles in top panel). Modifications of this light source turns the instrument polymer friendly (lower panel).

Read more in our recent paper in optics letters: https://doi.org/10.1364/OL.397589  

05.09.2019 - JACS-Paper on Molecular Processes underlying PUVA therapy out


Psoralens are natural compounds which in a photoinduced process may add to DNA. The process is relied on in treatments of skin diseases via PUVA therapy.

Together with undefinedWolfgang Zinth’s group of LMU München we studied this process with time resolved spectroscopy. The results are summarized in a recent undefinedarticle in JACS. The picture shows the Düsseldorf co-authors celebrating this in the Old Town.

13.08.2019 - Surprisingly simple molecules as potential OLED-Emitters?

Organic light-emitting diodes (OLEDs) find ever-increasing applications in display and lighting technology. Crucial components of OLEDs are special molecules termed emitters. Present emitters for the blue range of the visible spectrum have some shortcomings compared to their green and red counterparts. Our approach to improve blue emitters is summarized in a undefinedrecent contribution to q&more.

01.07.2019 - Tracing the Solvent Uptake of a Polymer by FSRM

The penetration of polymers by solvents has implications for diverse fields, such as the packaging of liquids and drug delivery. In experimental studies of this uptake processes, one aims at the spatial distribution of the solvent as a function of time. In a recent joint study with the undefinedgroup of Stefan Egelhaaf, we demonstrate that undefinedfemtosecond stimulated Raman microscopy (FSRM) - developed in house - is a very suitable technique for this purpose. Read more in undefined10.1021/acs.macromol.9b00205

19.02.2019 - On the Large Apparent Stokes Shift of Phthalimides

Phthalimides are electron deficient aromatics. They often serve as acceptors in donor acceptor conjugates for photo induced electron transfer. Surprisingly, the photo-physics of this important chromophore has not been studied in detail yet. Here, in a collaborative effort involving groups from Cologne (undefinedAxel Griesbeck) and Düsseldorf (Peter Gilch and undefinedOliver Weingart), the response of the phthalimide chromophore on photo-excitation was scrutinized by time resolved spectroscopy and quantum chemistry. Based on the results, the large Stokes shift of phthalimides and their solvent dependent fluorescence decay can be explained. Read more in undefined10.1039/C8CP07795A.

12.07.2018 - Poster Award for Anna Reiffers

Early July 2018 photochemists from all over the world (41 countries) gathered in Dublin for the biannual PhotoIUPAC conference. We are very proud that out of 220 contributions Anna Reiffers’ poster on “The Emissive State of Phthalimides” was selected for the poster award.

Congrats to Anna!

24.05.2018 - Imaging & Microscopy

In 2007 our group introduced a new technique for non-linear Raman imaging – femtosecond stimulated Raman microscopy, FSRM for short. With this technique it is now possible to record a complete Raman spectrum in only 100 µs which in turn allows for faster imaging. More information about this technique as well as its current applications can be found in a recently published undefinedarticle in the journal “Imaging & Microscopy”.

02.03.2018 - An Intuitive Demonstration of First Order Kinetics for the Lecture Hall

Many time dependent phenomena like radioactive decays and a plethora of chemical reactions obey first order kinetics. It is, thus, part of all chemistry and physics curricula. An intuitive introduction to the topic is described in our recent contribution for the Journal of Chemical Education. The lecture hall demonstration outlined therein relies on capillary flow and digital data acquisition. With a simple set-up a first order process can literally be seen. Read more in undefinedL. Festersen, P. Gilch, A. Reiffers, R. Mundt, J. Chem. Educ. (2018).

19.02.2018 - Scholarship for Janina Diekmann

Jürgen Manchot Stiftung

Our PhD student Janina Diekmann was awarded a scholarship by the undefinedJürgen Manchot Stiftung. This institution will support her research on light induced DNA damage for two years.

Verantwortlich für den Inhalt: E-Mail sendenProf. Dr. Peter Gilch