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SUMMARY:Probing the structures and interactions in reactive complexes and 
 ionic clusters
DTSTART:20180405T171500
DTEND:20180405T181500
DTSTAMP:20260508T104609Z
UID:1755db818b6d094047c8f0e119bd5290d4ab13cb4476137246463953
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Etienne Garand\nUniversity of Wisconsin-Madison\nUSA\nUn
 derstanding inter- and intramolecular interactions provide direct insights
  on molecular structure and reactivity.  As such\, it is vitally importan
 t in many research areas\, such as developments in rational design of cata
 lysts and molecular recognition.  Utilizing a method based upon a unique 
 combination of mass spectrometry and laser spectroscopy\, our research foc
 uses on capturing and characterizing complexes of interest to provide a mo
 lecular-level detailed examination of their structures and interactions. 
  To capture and isolate reaction intermediates\, we take advantage of the 
 high sensitivity and selectivity afforded by mass spectrometry.  To acces
 s otherwise unstable and short-lived species as well as microsolvated comp
 lexes\, we developed new capabilities to perform temperature-controlled ga
 s-phase chemistry and clustering.  These carefully isolated and prepared 
 complexes are directly probed inside the mass spectrometer using infrared 
 predissociation spectroscopy\, yielding well-resolved spectra that contain
  a wealth of information.  In this talk\, I will present the application 
 of our unique methodology in studies of model systems as well as homogeneo
 us catalytic water oxidation driven by the [Ru(tpy)(bpy)(H2O)]2+ complex.
   We successfully characterized several intermediates along the catalytic
  cycle as well as the solvent rearrangement in the first proton-coupled ox
 idation step.  Recent characterization of solvent effects on the structur
 e of flexible peptides will also be discussed\, highlighting the challenge
 s encountered while probing increasingly complex molecules and clusters.\n
  \n 
LOCATION:BCH 2201 https://plan.epfl.ch/?room==BCH%202201
STATUS:CONFIRMED
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