Siewert, Inke - Georg-August-Universitäten Göttingen

个人简介

seit 10/2013 Emmy Noether-Nachwuchsgruppenleiterin (DFG) an der Georg-August-Universität Göttingen, Institut für Anorganische Chemie 01/2011-09/2013 Forschungstipendiatin an der Georg-August-Universität Göttingen, Institut für Anorganische Chemie, angegliedert an den Arbeitskreis von Prof. Dr. Meyer 09/2009-12/2010 Postdoktorandin an der University of Oxford, Großbritannien, Arbeitsgruppe Prof. Dr. Aldridge 02/2009-08/2009 Postdoktorandin an der Humboldt-Universität zu Berlin, Arbeitsgruppe Prof. Dr. Limberg 10/2004-01/2009 Promotion an der Humboldt-Universität zu Berlin in der Arbeitsgruppe von Prof. Dr. Limberg; Thema: Aktivierung von Sauerstoff an neuartigen Koordinationsverbindungen der ersten Übergangsmetallreihe zur biomimetischen Oxidation 10/1999-09/2004 Diplomstudium Chemie an der Humboldt-Universität zu Berlin

研究领域

Activation of Small Molecules by Transition Metal Complexes Many redox reactions in nature and chemistry proceed in the transfer of both, electrons and protons, and in fact, this concept is utilised in the water oxidation of the photosystem II (PS II). At the oxygen evolving centre of the PS II four consecutive single electron transfer steps lead to the oxidation of water. Three out of the four electron transfer steps are most likely coupled to a proton transfer. The (almost) simultaneous transfer of protons and electrons avoids the formation of high energy intermediates, which could be formed in consecutive transfer steps The mimicking of this reaction is the key step for an energy change from fossil to sustainable fuels. The synthesis of C1-fuels or hydrogen requires electrons in order to reduce the precursors carbon dioxide or protons. Water is a cheap and widely available source of electrons and the only side product of the water oxidation reaction would be oxygen. Among others, the oxidation of water can be performed by transition metal complexes. Our projects target the activation of small molecules such as water or carbon dioxide by first row transition metal complexes. Complexes with earth abundant metal ions are able to accumulate two or more redox equivalents and thus, to facilitate multistep redox reactions. We synthesise novel metal complexes and subsequently investigate the complexes with respect to their ability to facilitate proton coupled electron transfer reactions. We investigate the mechanistic details of the reaction for a better understanding of the structure-activity relationship. Promising ligand-metal-structures are identified in order to design compounds to exploit the reactions for (electro)chemical water splitting catalysis or carbon dioxide reduction.

近期论文

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Cobalt Catalyst with a Proton-Responsive Ligand for Water Oxidation; I. Siewert*, J. Gałezowska, Chem. Eur. J., 2015, 21, 2780-2784. Trendberichte Koordinationschemie; I. Siewert*, M. Walter*, Nachrichten aus der Chemie 2015, 63, 242-251. Trendberichte Koordindationschemie; I. Siewert*, M. Walter*, Nachrichten aus der Chemie 2014, 62, 237-246. Di- and Trinuclear Zinc and Cobalt Complexes and their Reactivity towards Dioxygen; I. Siewert*, M. Sietzen, S. Dechert, S. Demeshko, Eur. J. Inorg. Chem. 2013, 3689-3698. Probing the influence of steric bulk on anion binding by triarylboranes: comparative studies of FcB(o-Tol)2, FcB(o-Xyl)2 and FcBMes2; I. Siewert*, P. Fitzpatrick, A. E. J. Broomsgrove, M. Kelly, D. Vidovic, S. Aldridge*, Dalton Trans.,2011, 40, 10345-10350. Syntheses of Homochiral 1,2-Ferrocene-Functionalized Lewis Acids and Acid/Base Pairs; I. Siewert*, D. Vidovic, S. Aldridge*, J. Organomet. Chem. 2011, 696, 2528-2532.