Zukünftige Termine
- 2026-05-18T16:00:00+02:00
- 2026-05-18T17:00:00+02:00
18
MontagAC Colloquium Prof. Dr. Martin Caleb - Baylor University USA
Carborane Substituted Boron Lewis Superacids Dodecacarborane clusters (C2B10H12) have been known for 60 years yet their application as an electron withdrawing group is not well established. Our group has been preparing boranes that feature two or three ortho-carboranes as bulky electron withdrawing groups on boron to enhance the Lewis acidity. The reactivity of the new boranes is compared to the state-of-the-art boranes with fluoroaryl groups revealing significantly greater Lewis acidity. The large steric profile of the carboranes make it an excellent Lewis acid partner in frustrated Lewis pair chemistry. A compound with two carboranes and a hydride is one of the most potent hydroboration reagents known that is capable of the uncatalyzed hydroboration of cyclopropanes. The properties of the feature compounds, mechanisms of the reactions, and isolation of reactive intermediates will be discussed.
- 2026-06-22T16:00:00+02:00
- 2026-06-22T17:00:00+02:00
22
MontagModelling the pyroelectricity of ferroelectric perovskite oxides
Pyroelectric materials convert fluctuating heat flows to electrical energy. The most efficient pyroelectric materials are inorganic ferroelectrics, that is, materials showing spontaneous, switchable electric polarization. We have developed a computational methodology to study the atomic-level mechanisms of pyroelectricity in inorganic ferroelectrics. We determine the primary pyroelectric coefficients by combining hybrid density functional calculations with self-consistent phonon theory and the Berry phase approach for polarization. Secondary pyroelectric coefficients are evaluated by combining thermal properties from quasi-harmonic approximation with elastic and piezoelectric coefficients.
- 2026-07-07T17:15:00+02:00
- 2026-07-07T19:00:00+02:00
7
DienstagENTFÄLLT! GDCh-Kolloquium: Prof. Dr. Seth Cohen
Prof. Dr. Seth Cohen, University of California, San Diego ..... Entfällt! ...........................
- 2026-07-21T16:00:00+02:00
- 2026-07-21T19:00:00+02:00
21
DienstagGDCh-Kolloquium: GDCh Summer Symposium
GDCh-Kolloquium: GDCh Summer Symposium (Teilnehmer*innen und Titel folgen) .........................
- 2026-08-07T09:00:00+02:00
- 2026-08-07T17:30:00+02:00
7
FreitagSYMPO 2026 - Bonn Symposium on Catalysis and Sustainability
The annual Bonn Symposium on Catalysis and Sustainability, SYMPO, will take place on August 7th, 2026 at the University of Bonn in newly constructed Bonn-Poppelsdorf campus. Researchers from the field of sustainable processes and catalysis (thermal, electro, bio…) will gather for an open exchange on the state-of-the-art and progression of the field. This conference is meant to be a platform to build collaborations and foster out-of-the-box collaborative ideas. The SYMPO conference further promotes young scientists, especially those in the early stages of their careers, and offers the opportunity to present their own work and approaches and discuss them with a broad audience. We are looking forward to an exciting and varied programme featuring a combination of oral and poster presentations. All interested participants are warmly welcomed to Bonn!