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Accueil > Séminaires > Année 2022 > Séminaire de Sebastian Riedel (11 oct)

Séminaire de Sebastian Riedel (11 oct)

FU Berlin

par Martrenchard-Barra Séverine - 3 octobre 2022


Le séminaire aura lieu dans l’amphi du bât 520 et sera également diffusé en visioconférence. Les personnes extérieures au laboratoire qui souhaitent disposer du lien sont invitées à envoyer un mail à l’adresse

seminaires.ismo@universite-paris-saclay.fr

Elles recevront le lien pour se connecter en retour.

Hot Chemistry in a Cold Environment : From Small Molecules to Technical Applications

A powerful technique to investigate fragile species is matrix-isolation spectroscopy in which ions or molecules can be trapped under cryogenic and inert conditions. However the preparation of such matrices can be challenging especially if ions should be transferred into the matrix. Our group developed a simple method to prepare such ionic species by pulsed salt laser-ablation technique.
In this context the formation of several free polyhalides like [F3], [Cl3] could be characterized under cryogenic conditions in rare-gas matrices. , Thereby the matrix environment is a crucial factor as shown by theoretical modeling of the interaction between rare-gas matrices and a trifluoride guest anion. Beyond these free ions, new techniques have been developed to prepare ion-paired complexes like MN3, MC3, or M[AuF4] under matrix-isolation conditions.
Based on these investigations novel synthetic strategies have been developed to prepare such species also in bulk quantities which can now be used as chlorine storage materials and afterwards applied in industrial processes like the phosgene production.

Sonnenberg, K. ; Mann, L. ; Redeker, F. A. ; Schmidt, B. ; Riedel, S. Poly- and Interhalogen Anions from Fluorine to Iodine. Angew. Chem. Int. Ed. 2020, 59, 5464.
Redeker, F. A. ; Beckers, H. ; Riedel. S. Investigation of Alkali Metal Polyfluorides by Matrix-Isolation Spectroscopy. RSC Adv. 2015, 5, 106568.
Bader, F ; Riedel, S. ; Beckers, H. ; Müller, C. ; Tremblay, J. C. ; Paulus, B. The peculiar interaction of trifluoride anions with cryogenic rare gas matrices. J. Phys. Chem. A 2021, 125, 6221.
Redeker, F. A. ; Ellwanger, M. ; Beckers, H. ; Riedel, S. Investigation of Molecular Alkali Tetrafluorido Aurates by Matrix-Isolation Spectroscopy. Chem. Eur. J. 2019, 25, 15059.
Voßnacker, P. ; Wüst, A. ; Keilhack, T. ; Müller, C. ; Steinhauer, S. ; Beckers, H. ; Yogendra, S. ; Schiesser, Y. ; Weber, R. ; Reimann, M. ; Müller, R. ; Kaupp, M. ; Riedel, S. Novel Synthetic Pathway for the Production of Phosgene. Science Advances 2021, 7, 40 : eabj5186
Voßnacker, P ; Schwarze, N. ; Keilhack, T. ; Kleoff, M. ; Steinhauer, S. ; Schiesser, Y. ; Paven, M. ; Yogendra, S. ; Weber, R. ; Riedel S. ; Alkyl Ammonium Chloride Salts for Efficient Chlorine Storage at Ambient Conditions. ACS Sustainable Chemistry & Engineering, 2022, 10, 9525.