News of the Institute and the groups@ICTM

Wilkening Group • Trimmel GroupGollas GroupSlugovc GroupHanzu GroupKoruza Group
... overview of all groups at the ICTM

  Disorder in Solids and its Consequences for Ion Dynamics 

Disorder in solid electrolytes and its impact on the various parameters controlling lithium-ion dynamics. Li4PS4I turned out to be a another model system to understand the changes in more detail. See Anna's and Jonas' impedance and NMR paper in Chem. Mater. Link to the publication.

  Proton transfer is key for zwitterion formation

A recent publication describes the conjugate addition of 2,4-di-tert-butyl-6-(diphenylphosphino)phenol to Michael acceptor molecules, which allows for a facile modular synthesis of stable phosphonium phenolate zwitterions bearing additional functional groups. The bonding situation in the zwitterions has been studied by NMR and UV-vis spectroscopies and scX-ray analysis of selected representatives. The zwitterions exhibit negative solvatochromism and a significant contribution of an ylidic resonance structure in the solid state and in aprotic solution. Kinetic studies revealed that proton transfer from the phenolic hydroxy group to the initially formed zwitterionic adduct, which carries the negative charge at the α-carbon to the electron-withdrawing group, is the rate-determining step of the reaction. In an aprotic solvent, Michael acceptors bearing a carbonyl group allow for pre-organization of the reactants, facilitating proton transfer from the phenol and thus comparatively rapid formation of the product. In protic solvents, the initial proton transfer is predominantly from the solvent and Michael acceptors that are not suitable for pre-organization react much faster than in an aprotic solvent.

  ICTM organizes this year's YPRA meeting

The Young Polymer Researchers Austria (YPRA) meeting aims to bring together undergraduate and graduate students as well as early career postdoctoral researchers in the field of polymer science from Austria, but is also open to participants from other countries. The meeting will provide a forum for the presentation of research in the form of oral and poster presentations, with ample time for networking and some input from senior researchers and will be held in Weiz, Styria, from September 18-20, 2024. For more information, please visit the YPRA website, which will be updated continuously in the coming weeks.

  Defects in Lithium Borohydride 

In their recent paper Thomas Scheiber and Bernhard Gadermaier show how defects can be conserved at the insulator:cnductor interfaces in two-phase LiBH4:ZrO2 composite materials. A concet that is highly intersting to achieve good ionic conductivities. Link to the publication.

  Cubic or Tetragonal 

Low-temperature NMR, in collaboration with the Panacea network and Sharon Ashbrook from St. Andrews, turned out to be highly useful to quickly check the local symmetry of Na-ions in Na3PS4. The exact symmetry does not influence overall ionic transport much, but the defect structure. Link to the publication.

Upcoming and recent events

Upcoming conferences:

International Conference, London, UK
June 15th-19th, 2024

-  invited keynote lecture by HMRW
-  two further contributions

48th International Conference
on Advanced Ceramics and Composites

Daytona Beach, Florida, USA
Jan 28th- Feb 2nd, 2024 

-  invited keynote lecture by HMRW
-  one further contribution by FS

POLYCHAR 2024 in Madrid, ES,
May 27-31, 2024

MACRO 2024 in Warwick, GB,
July 1-4, 2024

GDCh Makro 2024 in Dresden, DE,
Sept. 16-18, 2024

Chemietage in Graz,
Sept. 23-25, 2024

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