Technische Universität München
Professur für Dynamische Spektroskopien (Prof. Hauer)
Lichtenbergstr. 4
85748 Garching b. München
Time-Resolved Spectroscopy
Our work aims at deciphering energy transfer pathways and mechanisms in molecules and molecular ensembles. The fastest and most fundamental timescale of such processes is defined by the speed of atomic motion, namely in the femtosecond (10-15 second) range. This renders time-resolved laser spectroscopy with femtosecond pulses the method of choice, allowing us to describe e.g. energy transfer pathways of photosynthetic light harvesting complexes.
Yet in chemistry, not everything is ultrafast. Reaction dynamics along a photocatalytic cycle occur on a broad range of timescales, spanning ten orders of magnitude; from hundreds of femtoseconds for internal conversion in the photocatalyst to millisecond lifetimes of charge separated species in solution. We aim at the description of entire photocatalytic reactions to identify bottlenecks in cooperation with partners from synthesis and theory (see research overview).
Review of Scientific Instruments
Abstract: Transient absorption (TA) is the most prominent method to observe relaxation dynamics in the toolbox of ultrafast spectroscopy. Within the framework of time-dependent perturbation theory, TA is a…
Advanced Functional Materials
Abstract: Metal–organic frameworks (MOFs) are emerging as promising materials for multiphoton absorption (MPA), a nonlinear optical phenomenon relevant for applications, such as bioimaging, phototherapy, and…
Journal of Physical Chemistry Letters
Abstract: Spectroscopic studies of energy transport through the photosynthetic apparatus have been crucial to expanding our understanding of biological energy conversion. Correlating spectroscopic information…
Journal of the American Chemical Society
Abstract: The photochemical deracemization of aza-1-isoindolinones has been investigated. A chiral para-methoxy-substituted phenyl ketone was discovered that promotes the conversion of racemic…
Advanced Functional Materials
Abstract: Coordination polymers (CPs) represent an innovative class of materials with proven potential for multiphoton absorption applications. However, understanding the structure-property relationships that…
Advanced Optical Materials
Abstract: The unusually broad and intense visible (Vis) absorption band observed in naphthalenediimide–bithiophene (NDI-T2) co-polymers reflects complex electronic and vibronic interactions between donor and…
Journal of Physical Chemistry Letters
Abstract: Fluorescence-detected pump-probe (F-PP) spectroscopy is a recently developed method to study excited-state dynamics. F-PP combines the temporal resolution of conventional transient absorption (TA)…
Journal of the American Chemical Society
Abstract: Chiral spirocyclic oxetanes [2-oxo-spiro(3H-indole-3,2′-oxetanes)] were subjected to irradiation in the presence of a chiral thioxanthone catalyst (5 mol %) at λ = 398 nm. An efficient kinetic…
Journal of the American Chemical Society
Abstract: Chiral spirocyclic oxetanes [2-oxo-spiro(3H-indole-3,2′-oxetanes)] were subjected to irradiation in the presence of a chiral thioxanthone catalyst (5 mol %) at λ = 398 nm. An efficient kinetic…
Journal of Chemical Physics
Abstract: Transient absorption (TA) is the most widespread method to follow ultrafast dynamics in molecules and materials. The related method of TA anisotropy (TAA) reports on the ultrafast reorientation…
