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31. Januar 17:00 - 18:00“Supramolecular Electrochemistry: Novel Approaches for Sensing and Redox Switching”

Ort: Gebäude 32, Raum 107

Veranstalter: Fachbereich Biologie/Chemie

Kategorie: Vorträge, Kolloquien

GDCh-Kolloquium im Fach Chemie der Universität Osnabrück

Referent: Dr. Robert Hein

Stratingh Institute for Chemistry, University of Groningen, Netherlands

As ubiquitous constituents of Nature, ions play a crucial role in a wide range of environmental, physiological and technical applications, necessitating their selective detection. Due to their low-cost, high sensitivity and real-life applicability, electrochemical sensors have been increasingly explored in this context. In particular, synthetic supramolecular ion receptors based on reversible host-guest interactions have emerged as promising candidates for the construction of reusable electrochemical ion sensors.1 Nevertheless, a routine application of such systems, remains elusive, in particular for the detection of anions. Herein, recent contributions to an improved fundamental understanding of these systems2 as well as their proof-of-principle application in reusable, real-time flow sensors will be discussed.3,4 A particular focus will be directed at redox-active anion receptors, which can not only enable sensing in various voltammetric or redox-capacitive formats but are also powerful, electrochemically switchable ion receptors.2-5 As a result, they can not only serve as versatile platforms for the fundamental investigation of non-covalent interactions2,5 but are also promising candidates in the construction of electrochemically-driven molecular switches and machines.6

1)  R. Hein, P.D. Beer, J.J. Davis, Chem. Rev. 2020, 120, 1888.
2)  R. Hein, X. Li, P.D. Beer, J.J. Davis, Chem. Sci. 2021, 12, 2433.
3)  S. C. Patrick, R. Hein, M. Sharafeldin, X. Li, P. D. Beer, J. J. Davis, Chem. Eur. J. 2021, 27, 17700.
4)  S. C. Patrick, R. Hein, P. D. Beer, J. J. Davis, J. Am. Chem. Soc. 2021, 143, 19199.
5)  R. Hein, A. Docker, J. J. Davis, P. D. Beer, J. Am. Chem. Soc. 2022, 144, 19, 8827.
6)  R. Hein, B. L. Feringa, unpublished results.