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
1514-213, Aud I, Institut for Kemi
15:00-15:15 Coffee & cake
16:15-17:00 Q&A session for PhD students
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.