Aarhus Universitets segl

Department of Chemistry Seminar Series: Professor Eric Tyrode, Chemistry Department, KTH Royal Institute of Technology, Stockholm, Sweden (Vært: Tobias Weidner)

Ion specificities at charged aqueous interfaces: molecular insights revealed by non-linear vibrational spectroscopy

Oplysninger om arrangementet

Tidspunkt

Torsdag 15. december 2022,  kl. 15:00 - 17:00

Sted

1514-213, Aud I, Institut for Kemi

Program:                                                                                                                           
15:00-15:15       Coffee & cake
15:15-16:00       Talk
16:15-17:00       Q&A session for PhD students

Abstract:
Although the theoretical description of charged interfaces was first formulated more than a century ago, starting with the pioneering work of Gouy and Chapman, direct molecular experimental confirmation only became possible much more recently. This seminar will describe the behaviour of a model-charged interface consisting of a fatty acid Langmuir monolayer. Molecular insights are obtained using vibrational sum frequency spectroscopy, a technique that provides information on the surface charge, surface potential, contact-ion pair formation, as well as related ion-specific phenomena. The experimental results are used as a benchmark to test the suitability of various theoretical models describing charged interfaces and provide exciting new insights into the complex interactions of metal cations with the biophysically relevant carboxylic acid moiety.

Suggested reading:

https://doi.org/10.1038/nchem.1899

https://doi.org/10.1021/acs.jpcc.9b06435   

https://doi.org/10.1021/acs.jpcb.1c07758