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Ursula Keller wins “Swiss Nobel” Marcel Benoist Prize- for pioneering work in ultrafast lasers
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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

Vis-pump/IR-probe transient absorption

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Location        Contact
Sciences II University of Geneva
30, Quai Ernest Ansermet
1211 Geneva 4
      Marius Koch
Tel + 41 22 379 31 86
3 mv#aru&iuk&s.x4koo9chp4@ug2niz&gen4.cy(hw 
         

Setup / Configuration

 
     

Literature

 
  • pump wavelength: 400 nm
  • probe wavelength: 2-10 µm
  • instrument response function : 250 fs (fwhm)
  • time delay range up to 2 ns
  • detector: 2 x 64 MCT array
  • spectral resolution 3-4 cm-1 (150 lines/mm)
 
     
  • Bredenbeck, J., Hamm, P. (2003) Versatile small volume closed-cycle flow cell system for transient spectroscopy at high repetition rates. Rev Sci Instrum 74 (6), 3188-3189 »»
 

IR setup IR Setup

       
The image shows the sample area where the two IR beams (red) are focussed into the sample using parabolic gold mirrors. One of the beams is spatially overlapped with the Vis-pump pulse (blue). The black arrows indicate the position of the flow cell system which can be moved in X/Y/Z direction via µm screws.
 
      Two linearly polarized IR-beams measure simultaneously the vibrational response of the sample in a flow cell system similar to Ref 1. The first IR-beam measures a sample volume that was excited by the pump while the second beam measures an unexcited sample volume.
Transient dichroism measurements can also be performed.

 
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The National Centres of Competence in Research (NCCR) are a research instrument of the Swiss National Science Foundation