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SUMMARY:Revealing structure\, dynamics and chirality of molecular systems
DTSTART:20160526T163000
DTEND:20160526T173000
DTSTAMP:20260527T163428Z
UID:f7936bad510a3e8f57337fff1b93cac1b77322650d9ac24e17cbcad2
CATEGORIES:Conferences - Seminars
DESCRIPTION:Priv.-Doz. Dr. Melanie Schnell\nMax-Planck Research Group "Str
 ucture and Dynamics of Cold and Controlled Molecules"\nMax-Planck-Institut
  für Struktur und Dynamik der Materie\;\nCenter for Free Electron Laser S
 cience\;\nThe Hamburg Centre for Ultrafast Imaging of the Universität Ham
 burg\nLuruper Chaussee 149\nBuilding 99\nD-22761 Hamburg\nMost molecules o
 f biochemical relevance are chiral. Even though the physical properties of
  two enantiomers are nearly identical\, they can exhibit completely differ
 ent biochemical effects\, such as different odor in the case of carvone. I
 n nature and as products of chemical syntheses\, chiral molecules often ex
 ist in mixtures with other chiral molecules. The analysis of these complex
  mixtures to identify the molecular components\, to determine which enanti
 omers are present\, and to measure the enantiomeric excesses (ee) remains 
 a challenging task for analytical chemistry.\nWe recently experimentally d
 emonstrated a new method of differentiating enantiomeric pairs of chiral m
 olecules in the gas phase. It is based on broadband rotational spectroscop
 y and is a three-wave mixing process that involves a closed cycle of three
  rotational transitions. The phase of the acquired signal bares the signat
 ure of the enantiomer\, as it depends upon the product of the transition d
 ipole moments\, and the signal amplitude is proportional to the ee. A uniq
 ue advantage of our technique is that it can also be applied to mixtures o
 f chiral molecules\, even when the molecules are very similar. I will intr
 oduce the technique and give an update on the recent developments.\n 
LOCATION:CH G1 495 https://plan.epfl.ch/?room==CH%20G1%20495
STATUS:CONFIRMED
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