Organometallic Single-Molecule Mangets Containing Radicals and Bismuth Single-molecule magnets (SMMs) are molecules that possess an energy barrier to spin inversion, giving rise to slow magnetic relaxation and magnetic hysteresis. To realize their intriguing potential applications, ranging from molecular spintronics, quantum computing, to high-density information storage, spin-reversal barriers (Ueff) and magnetic blocking temperatures (TB) must be increased. Lanthanide ions are especially well-suited for the design of SMMs due to their large magnetic moments and magnetic anisotropy that originate from strong spin-orbit coupling of the 4f orbitals. One effective methodology to boost blocking temperatures of multinuclear compounds is to generate strong magnetic exchange between lanthanide centers using radical bridging ligands.
Vorträge-Koll
When Organometallic and Fluorine meet… The incorporation of fluorine substituents into organic ligands can lead to unique properties when coordinated to a metal centre. For example, the reduced donor ability of the perfluorinated Cp* ligand [C5(CF3)5]- leads to an unprecedented substitution lability of its metal complexes. The use of experimental techniques from inorganic fluorine chemistry (working with superacids or very powerful oxidizing agents) allows the isolation of highly reactive organometallic compounds with fascinating structures that are otherwise inaccessible.
Dr. Markus Bursch, FACCTs Visions to FACCTs - Working at a Quantum Chemistry Start-Up In the last decade, quantum chemistry became an integral part of modern chemical sciences. It represents a valuable tool and methodological toolkit to investigate a vast space of chemical compounds, their properties, and possible applications. While QM is still mostly considered a specialists-only field, we at FACCTs work on software solutions to bring convenient QM to every scientist, being it theoretical, computational, or experimental chemists. In my talk, I will give some insights into my time at FACCTs, what we are doing, and how every chemist may profit from our work.
Professor Dr. Karl Gademann, Universität Zürich Microbiome Metabolites: Syntheses and Surprises The microbiome is composed of different microorganisms such as bacteria that live on or in a complex host, such as e.g. humans or plants. Estimates suggest that bacterial cells outnumber their human host cells by as much as 10:1, leading directly to the question: Who is in control? Interactions, and ultimately control of the microbiome with their host might involve the trading and trafficking of chemicals. We will present recent studies from our group investigating small molecule chemicals that serve as signals for bacterial communication, cyclitols for chemical offense, and a recent total synthesis of peyssonnoside A which might be produced by the microbiome of red algae, complemented with other terpene syntheses.
Zur diesjährigen Weihnachtsvorlesung mit vielen Experimenten sind Studierende, Mitarbeiter*innen, Kolleg*innen und Chemieinteressierte herzlich eingeladen. Schulklassen werden um vorherige Anmeldung gebeten. Für alle anderen Interessenten, z. B. Studierende, ist keine Anmeldung erforderlich. Bitte beachten Sie jedoch, dass die Anzahl an Plätzen in den Hörsälen begrenzt ist.
GDCh-Kolloquium: Junge Forscherinnen und Forscher der Bonner Chemie stellen sich vor ..............................
Prof. Dr. Erwin Reisner, University of Cambridge, UK: Sunlight-Powered Circular Chemistry Solar panels are well established to produce electricity as photovoltaic cells and are already in advanced development to photo-catalyse overall water splitting to produce green hydrogen as artificial leaves or photocatalyst sheets. This presentation will introduce solar chemistry panels as an emerging technology to enable sunlight-powered circular carbon chemistry. Our progress in designing and constructing prototype solar devices for the direct conversion of carbon dioxide as well as the coupling to the valorisation of biomass and plastic waste streams into renewable fuels and higher-value chemicals will be presented.
Dr. Simon Rickert, ETH Zürich (Title to be announced) ...............................................