Master Students

The Krossing Group

Name

eMail Address

Room

Phone:

+49 761-

Work Area

Matthis Seiler

ms1942@email.uni-freiburg.de

R 328

203-6153

Oxidation and investigation of the reactivity of single molecule magnets lanthanide complexes

Celine Regnat

cr310@email.uni-freiburg.de

R 328

203-6153

Synthesis and application of low-valent group 13 cations

Johannes Thiemann

johannes.thiemann@email.uni-freiburg.de

R 328

203-6153

Non-aqueous electrolytes for applications in rechargeable magnesium batteries

Sebastian Maas

sebastian.maas@ac.uni-freiburg.de

R 328

203-6153

Electrode development for sustainable battery systems

Our Twitter (X) Account: @KrossingGroup

News

September 2024 - Check out our new Video Tutorials on the preparation of Li[Al(OR^F)₄] as well as [HCB₁₁H₁₁]^– and [HCB₁₁F₁₁]^–

September 2024 Congrats…! Konstantin Kloiber was awarded one of the few Poster Prizes selected out of the 230 presented posters at the GDCh-Meeting for Inorganic Chemistry held at the TU Munich. It deals with the development and application of very remarkable deelectronator reagents with formal potentials between +1.53 and +2.12 V vs. ferrocene!

September 2024 Congrats…! Dr. Philipp Dabringhaus, former PhD fellow of the group and current Feodor-Lynen-Fellow at the MIT, is awarded the Wöhler-Promotionspreis für Anorganische Chemie (= Wöhler-Dissertation-Prize for Inorganic Chemistry) at the GDCh-Meeting for Inorganic Chemistry held at the TU Munich.

August 2024 Six years of work, but now it’s out with Nature Communications. Our contribution Pushing the redox potentials of deelectronators to highly positive values using solvent effects and weakly coordinating anions, see the PR-statement, why we are so proud on this publication.

July 2024 Dinitrogen at copper and a Raman stretching vibration frequency at 2314 cm^–1. Check out, why Julie and Manuel are so excited on the complex in their Angewandte-paper Synthesis and Characterization of a Copper Dinitrogen Complex Supported by a Weakly Coordinating Anion.

July 2024 Fluorine does the trick: Lukas found the first ternary methanol catalyst in Oxidative Fluorination of a Ternary Cu/ZnO/FeO_x Methanol Catalyst ─ A Proof of Principle, which significantly profited by Oxidative Fluorination. Read why…

June 2024 Malte’s 2 V class of deelectronator reagents published as a Research Article with Angewandte. See in Utilizing the Perfluoronaphthalene Radical Cation as a Selective Deelectronator to Access a Variety of Strongly Oxidizing Reactive Cations, why perfluoronaphthalene radical cation salts have even higher potentials in the solid state.

April 2024 A chemical toolbox, this is what Philipp has designed in his work to facilitate bond activations with Ga⁺ and suitable phosphane ligands. Check out our Nature Synthesis paper In situ formation of reactive (di)gallenes for bond activation, why this is so important.

March 2024 Ingo Krossing was elected as Chemistry Europe Fellows and is a member of the class of 2022/23 – one of only two German nationals (link).

March 2024 Philipp got awarded a Feodor-Lynen-Fellowship of the Alexander von Humboldt-Foundation and started his postdoctoral work at MIT in Boston associated to the group of Gilliard. Good luck for the new career-step!

December 2023 Andreas worked very hard, but finally he at least could convert smaller amounts of dimethyl ether with monomeric formaldehyde directly to oxymethylene dimethyl ethers. See our article Continuous Anhydrous Synthesis of Oxymethylene Dimethyl Ethers by Reaction of Dimethyl Ether with Molecular Formaldehyde in Small why this is so difficult.

October 2023 Metallocene dication? Jan did it. The first of its kind using the parent C₅H₅-ligand in a stable Ni(C₅H₅)₂²⁺ salt: See Synthesis and Characterization of a Stable Nickelocenium Dication Salt in Angewandte.

September 2023 Malte’s review article on Homoleptic Transition Metal Carbonyl Cations: Synthetic Approaches, Characterization and Follow-Up Chemistry appeared with Accounts of Chemical Research. Check it out…!

July 2023 – Henrik received a CrystEngComm Poster Prize at the 23rd International Symposium on Fluorine Chemistry (July 23-28, 2023, Québec City) for his poster entitled “With Fluorine to Methanol Catalysts for Sustainable CO2-Hydrogenation”! Congratulations Henrik!

May 2023 Rechargeable Al ion batteries (AIBs)? Read our Energy & Environmental Science paper on the amazing properties of an AIB with organic cathodes: On a high-capacity aluminium battery with a two-electron phenothiazine redox polymer as a positive electrode. Gorgeous work together with Birgit Esser@U of Ulm as part of our joined AMPERE-DFG-Project.

April 2023 – Lukas received a poster price at the Syngas Convention 4 in Cape Town for presenting his work on the fluorination of methanol catalysts. Very exciting and new in-situ pXRD results obtained in cooperation with Prof. Dr. Nico Fischer at the University of Cape Town! Congratulations Lukas!

December 2022 – Marriage among main group classics: See how Schnöckel’s AlCp*-tetramer and Jutzi’s SiCp*-cation unite two give unique clusters. Angewandte even upgraded the communication to a research paper… See our News Entry.

November 2022 – Cationic dialanes. Cp-ligands enable strange fluxional bonding situation. Philipps paper in Chem. Comm. tells you why… See our News Entry.

October 2022 – Simplicity first. Now also Ni(I)-benzene cations were made accessible by Manuel. They show an unexpected η³-,η⁶-coordination. This also explains the gas phase experiments by T. Lau… Link. See our News Entry.

September 2022 – Philipp’s stunning mixed low-valent group 13 cations got accepted with Chem. Sci. Check it out…! See our News Entry.

September 2022 – Believe it or not, there may be too much fluorine within a WCA. We show that the perfluorinated alkoxyaluminate accepts an electron upon Mg-deposition, forms MgF₂ and inhibits further Mg-deposition effectively. See why: Link. See our News Entry.

September 2022 - Finally. Together with Jan Weigand we published access to the elusive P-cations including the first single crystal X-ray structure determination. Link. See our News Entry.

August 2022 – We are now on Twitter. Checkout @KrossingGroup to keep updated. The account is administrated by group members.

Early September 2022 - On the 44th International Conference on Coordination Chemistry – ICCC2022 in Rimini, Italy, 28 Aug – 2 Sep 2022 – Philipp Dabringhaus won with his poster "From an Al₄-Cluster to Al⁺ Complexes: Lessons on Metalloid Clustering" a poster prize in the section "T2: Coordination Chemistry of s-, p- and f-block Elements: Synthesis, Characterization, Reactivity and Theoretical Studies". Congratulations...!

Poster Philipp Dabringhaus

Awardwinning Poster PD

PD_Poster_Rimini.pdf

Adobe Acrobat Dokument 2.3 MB

Download

10.08.2022 – Malte got his trimetallic Ru and Os cation [M₃(CO)₁₄]²⁺ paper in Chemical Science published. Due to the excellent review reports, this work was selected as basis for the Front Cover of the Journal and the “Pick off the Week” by the Chem. Sci. Editors. Link. See our News Entry.

04.08.2022 - Philipp got his subvalent aluminum cluster cation [Al(AlCp*)₃]⁺ paper in Nature Chemistry published. Congrats. See here for the paper and here for the blog.

See our News Entry.

28.06.2022 - Our group is now member of the "Red Lions Club" for having presented more than ten contributions on the Weimar Catalysis meeting.

02.06.2022 - Dustin Kubas from our catalysis lab went online with a videopodcast produced by our university. Topic is dependence from Russian gas and sustainable ways around.

Great stuff, have a look: Link.

25.05.2022 - Jan got his open-shell iron pentacarbonyl cation [Fe(CO)₅]^•+ paper in Angewandte Chemie published. Congrats and thanks to Sabine and Karsten for help with EPR and Mössbauer. Link See our News Entry.

26.04.2022 - Prof. Ingo Krossing receives ERC Advanced Grant for the construction of a universally applicable redox scale. https://kommunikation.uni-freiburg.de/pm/personalia/chemiker-ingo-krossing-erhaelt-erc-advanced-grant-fuer-den-aufbau-einer-allgemeingueltigen-redox-skala

11.04.2022

Fritz received the FMF challenge cup for the best abstract.

Congratulations Fritz!

22.11.2021 - Antoine got his paper on “Ga⁺-Catalyzed Hydrosilylation? About the Surprising System Ga⁺/ HSiR₃/ Olefin, Proof of Oxidation with Subvalent Ga⁺ and Silylium Catalysis with the Perfluoroalkoxyaluminate Anion.” in Chem. Sci. 2021 accepted. Link: https://doi.org/10.1039/D1SC05331K

Ga⁺ initiates the hydro-silylation of olefinic double bonds with HSiR₃. Surprising-ly, subvalent Ga⁺ oxidizes silanes to silylium ions, the true catalysts of this reaction.

15.10.2021 - Samuel got his paper on "Oxidative Fluorination on Cu/ZnO Catalysts for Methanol Synthesis" in ACS Catalysis accepted!

Congrats. Link: https://doi.org/10.1021/acscatal.1c03735

Oxidative fluorination of a Cu/ZnO catalyst system increased the defect/copper ratio on the surface of the resulting Cu/ZnO/ZnF₂ system.

11.10.2021 - Antoine Barthelemy got the Kekulé-stipend from the FCI. Congratulations to him for a prestigious feather at his hat...!

04.08.2021 - Andreas Peter and Maximilian Schmucker defended their PhD Theses with great success. Congratulations to both of them...!

01.07.2021 - Samuel Fehr defended his PhD Thesis with great success. Congratulations to Samuel...!

11.06.2021 - Was macht eine gute Verbrennung aus? - Das Freiburger Materialforschungzentrum (FMF) stellt sich mit seiner Forschung zu Oxymethylenethern auf dem "Freiburger Wissenschaftsmarkt" vor

News...

31.05.2021 - Redox–Flow–Batterie mit langer Lebensdauer - Wir setzen das gut verfügbare chemische Element Mangan als Aktivmaterial ein

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26.03.2021 - 200.000 Euro für Forschung zu nachhaltiger Energie - Die Eva Mayr-Stihl Stiftung fördert unseren Arbeitskreis als Teil einer neuen Saltus!-Gruppe der Universität Freiburg

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19.01.2021 - Lea Eisele successfully defended her PhD thesis. Congratulations to Dr. Eisele...!

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10.12.2020 - Wiebke Unkrig successfully defended her PhD thesis.

Congratulations to Dr. Unkrig...!

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06.12.2020 - Our first paper in the new journal Batteries & Supercaps got accepted. Nice collaboration with D. Aurbach, A. Fischer and H. Gasteiger...

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26 and 28.10.2020 - Simon Weigel and Kim Glootz successfully defended their PhD theses. Congratulations to Dr. Weigel and Dr. Glootz...!

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07.10.2020 - Philipp won the prestigous Kekulé-Fellowship of the Fonds der Chemischen Industrie (FCI). Congratulations...!

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23.09.2020 - Kim and Antoine got their Ga(COD)₂-[Al(OR^F)₄] paper accepted with Angew. Chem.

15.09.2020 - Our first joint paper with Gernot Frenking accepted with Chem. Eur. J.

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14.09.2020 - Jan Kuhlenkampff won the Steinhofer-Award of our faculty for his top performance during his M.Sc. Chem. studies...!

Congratulations...

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01.09.2020 - Wiebke's Niobium-Arene Paper online with Chem. Eur. J.

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10.08.2020 - Philipp's Sr-WCA paper accepted with Angew. Chem.

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07.08.2020 -

Lea's BF₃-coated CAM paper online with J. Electro-chem. Soc.

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04.08.2020 -

Marcel's Stack-by-Stack paper online with Chem. Eur. J.

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