Aziz-Lange, Ghadwal, Glaser, Godt, Hellweg, Hoge, Kohse-Höinghaus, Kühnle, Mitzel
Life Science Chemistry
Dierks, Fischer v. Mollard, Gröger, Hellweg, Kottke, Lübke, Niemann, Sewald
Gas Phase- und Atmospheric Chemistry
Brockhinke, Eisfeld, Kohse-Höinghaus, Koop, Manthe, Mitzel
Public Understanding of Science
Dunker, Kohse-Höinghaus, Lück, Mitzel
Important subjects in the research area Molecule-based Materials are molecular magnets, biomimetic catalysts, cytostatic compounds, fluorinated compounds, organometallic compounds, silanes, spin probes an models for EPR-spectroscopy, microgels and microemulsions.
Protein crystallography is used and sulfatases, lysosomal hydrolases and membrane transport are studied in the research area Life Science Chemistry. An additional focus are bioorganic and biocatalytic topics in organic chemistry groups, which are also investigated by biochemistry groups within the Faculty of Chemistry.
Research topics in Gas Phase- und Atmospheric Chemistry are combustion, atmospheric aerosols and ice nucleation. The core facility „gas-electron diffraction and structure analysis of small molecules“ (GED@BI, N. Mitzel) is funded by the DFG and is unique within the EU.
The research area Public Understanding of Science focuses on research concerning instructions in chemistry during early childhood.
The Faculty of Chemistry is characterized by interdisciplinary research, which is typical for Bielefeld University. Researchers in the research area Molecule-based Materials cooperate with the department of Physics.
The research area Life Science Chemistry is strengthened by cooperation with the Faculty of Biology, the Faculty of Technology and the CeBiTec.
The „Center for Molecular Materials“ CM2 is an academic department with groups from chemistry and physics (coordinator B.Hoge), which aims at connections between technical know-how of industrial partners and basic research at the university.
In addition, each group is involved in national and international research cooperations.
Three-Fold Scholl-Type Cycloheptatriene Ring Formation around a Tribenzotriquinacene Core: Toward Warped Graphenes
An unprecedented 3-fold Scholl-type cycloheptatriene ring formation around a tribenzotriquinacene core is realized, producing a polyaromatic arene with a wizard hat-shaped structure. The presence of three 3,4-dimethoxyphenyl rings at the C-1, C-4 and C-8 positions of the tribenzotriquinacene skeleton is crucial to the success of this transformation.
H.-W. Ip, C.-F. Ng, H.-F. Chow and D. Kuck, J. Am. Chem. Soc. 2016, 138, 13778–13781. [DOI: 10.1021/jacs.6b05820]
A High-Throughput Fluorescence Assay to Determine the Activity of Tryptophan Halogenases
Biocatalytic halogenation with tryptophan halogenases is hampered by severe limitations such as low activity and stability. These drawbacks can be overcome by directed evolution, but for screening large mutant libraries, a facile high-throughput method is required. Therefore, we developed a quantitative halogenase assay based on a Suzuki-Miyaura cross-coupling towards the formation of a fluorescent aryltryptophan. The technique was optimized for application in crude E. coli lysate without intermediary purification steps, and was used for quantitatively monitoring the formation of halogenated tryptophans with high specificity by facile fluorescence screening in microtiter plates. This novel screening approach was exploited to engineer a thermostable tryptophan 6-halogenase. Libraries were constructed by error-prone PCR and selected for improved thermal resistance simply by fluorogenic cross-coupling. Our method led to an enzyme variant with substantially increased thermal stability and 2.5-fold improved activity.
C. Schnepel, H. Minges, M. Frese, N. Sewald, Angew. Chem. Int. Ed. 2016, 55, 14159–14163; Angew. Chem. 2016, 128, 14365–14369.
[DOI: 10.1002/ange.201605635 (deutsch)]
[DOI: 10.1002/anie.201605635 (english)]