Zukünftige Termine
- 2024-04-09T17:00:00+02:00
- 2024-04-09T18:00:00+02:00
GDCh-Kolloquium Professor Dr. Trevor Hayton
Using NMR Spectroscopy to Evaluate Actinide-Ligand Bond Covalency Understanding actinide-ligand covalency is at the center of efforts to design new separations schemes for spent nuclear fuel, and thus features considerable practical importance. NMR spectroscopy is a widely available means of measuring 5f covalency that is complementary to more established methods, such as optical spectroscopy and XANES. However, its use for this purpose is still in its infancy. Herein, I will discuss our efforts to develop 1H and 13C NMR spectroscopy for the evaluation of An-L covalency in a wide variety of diamagnetic actinide complexes, including thorium allenylidenes and thorium hydrides.
- 2024-04-30T17:00:00+02:00
- 2024-04-30T18:00:00+02:00
GDCh-Kolloquium Professor Dr. David Powers
Making, Seeing, and Using Subvalent Nitrogen Species Direct C H amination chemistry via electrophilic subvalent nitrogen intermediates could radically simplify access to nitrogen containing small molecules by providing the chemical tools to selectively convert ubiquitous C H bonds to valuable C N bonds At present, challenges in chemoselectivity sustainability, and synthetic versatility prevent realization of the synthetic potential of C H amination.This talk will describe recent efforts from the Powers Laboratory that advance 1 new strategies to structurally characterize transient intermediates in C H functionalization reactions, 2 novel metal free approaches to the sustainable generation of strong oxidants needed in C H functionalization reactions, and 3 bifunctional reagent platforms that enable rapid elaboration of the primary products of C H amination Future directions and challenges will be discussed.
- 2024-05-21T17:00:00+02:00
- 2024-05-21T18:00:00+02:00
GDCh-Kolloquium Professor Dr. Demyan Prokopchuk
Ligand Based C-H Bond Weakening for Synthesis and Electrocatalysis with Earth-Abundant Metals The selective, efficient, and sustainable activation of carbon-hydrogen bonds continues to be a critical area of research. Current synthetic methodologies heavily rely on transition metal catalysts to mediate the reactivity of C-H bonds for making medicines, fuels, agrochemicals, and materials. Broadly speaking, we are interested in leveraging C-H bonds housed within chelating ligand frameworks to understand the fundamentals of C-H activation and discover new (electro)catalytic transformations.
- 2024-05-26T15:30:00+02:00
- 2024-05-29T12:00:00+02:00
KOPO 2024
KOPO 2024 CONJUGATED OLIGOMERS AND POLYMERS 12th Workshop May 26-29, 2024 Physikzentrum Bad Honnef