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05.09.2022 - 09.09.2022, Iseolago hotel, Iseo, Italy.

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MUST2022 Conference- a great success!
New scientific highlights- by MUST PIs Wörner, Chergui, and Richardson
FELs of Europe prize for Jeremy Rouxel- “Development or innovative use of advanced instrumentation in the field of FELs”
Ruth Signorell wins Doron prizefor pioneering contributions to the field of fundamental aerosol science
New FAST-Fellow Uwe Thumm at ETH- lectures on Topics in Femto- and Attosecond Science
International Day of Women and Girls in Science- SSPh asked female scientists about their experiences
New scientific highlight- by MUST PIs Milne, Standfuss and Schertler
EU XFEL Young Scientist Award for Camila Bacellar,beamline scientist and group leader of the Alvra endstation at SwissFEL
Prizes for Giulia Mancini and Rebeca Gomez CastilloICO/IUPAP Young Scientist Prize in Optics & Ernst Haber 2021
Nobel Prize in Chemistry awarded to RESOLV Member Benjamin List- for the development of asymmetric organocatalysis
NCCR MUST at Scientifica 2021- Lightning, organic solar cells, and virtual molecules
#NCCRWomen- NCCR MUST celebrates 50 years women’s right to vote in Switzerland

Ultrafast Photoelectron Spectroscopy of Excess Electrons in Water and Alcohols

Date Mo, 02.09.2019 - Mo, 02.09.2019
Time 11:00
Speaker Prof. Toshinori Suzuki, Kyoto University, Japan
Location EPFL campus, BCH 2201
Program Weyl found strong blue coloration of liquid ammonia by dissolving sodium and potassium in 1864, and it was identified later as due to an electronic transition of solvated electron. A number of theoretical and experimental studies have been reported on solvated electrons, while their structures and dynamics are not fully understood yet. We employed ultrafast photoelectron spectroscopy of liquid microjets of water, methanol and ethanol to investigate electron binding energy (eBE), electronic relaxation, and solvation dynamics of solvated electrons. Using a single order high-harmonic light source (h = 29 eV), we refined the previously reported eBE values of solvated electrons and found the eBE distributions to be Gaussian. Using the eBE function, we developed a spectral retrieval method that enables us correct UV photoelectron spectra against electron inelastic scattering in the liquids. The excited state lifetimes of solvated electrons were measured using 3 sequential femtosecond pulses for synthesis, pump and probe. The photoelectron signals from the excited and ground state of solvated electron were clearly differentiated, and we found that non-adiabatic transition from the first excited state occurs in considerably shorter time than theoretical prediction. The solvation times in the ground state of solvated electron were extracted for the first time.

Ref.
Nishitani et al., Sci. Adv. 5, eaaw6896 (2019)
Karashima et al., J. Phys. Chem. Lett. 10, 4499–4504 (2019)
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