Research

cr-2017-00081t_0031Crossings of electronic potential energy surfaces in nuclear configuration space, known as conical intersections, determine the rates and outcomes of a large class of photochemical molecular processes.

We have established a wide range of time-resolved spectroscopic techniques which span from the infrared to the X-ray regimes and can be used for probing the nonadiabatic dynamics in the vicinity of conical intersections.

jz-2016-01369k_0005The functional understanding of biomolecules like DNA, RNA and phospholipids requires knowledge of the ultrafast dynamics on the femto- to picosecond time scale of molecular motions due to fluctuating electric fields and hydrogen bonding.

2D-IR spectroscopy offers chemical selectivity with a (sub-)100 fs time resolution allowing to study these phenomena in real time.

Basic processes in chemistry and biology involve protons in a water environment. Water structures accommodating protons and their motions have so far remained elusive.

Figure-1-revised

The description of dissipative quantum dynamics subject to non-Markovian system-bath memory poses persistent challenges that arise in particular for systems of biological relevance, e.g., composed of multiple exciton states coupled to charge transfer states.