Revealing structure, dynamics and chirality of molecular systems
Event details
| Date | 26.05.2016 |
| Hour | 16:30 › 17:30 |
| Speaker |
Priv.-Doz. Dr. Melanie Schnell Max-Planck Research Group "Structure and Dynamics of Cold and Controlled Molecules" Max-Planck-Institut für Struktur und Dynamik der Materie; Center for Free Electron Laser Science; The Hamburg Centre for Ultrafast Imaging of the Universität Hamburg Luruper Chaussee 149 Building 99 D-22761 Hamburg |
| Location | |
| Category | Conferences - Seminars |
Most molecules of biochemical relevance are chiral. Even though the physical properties of two enantiomers are nearly identical, they can exhibit completely different biochemical effects, such as different odor in the case of carvone. In nature and as products of chemical syntheses, chiral molecules often exist in mixtures with other chiral molecules. The analysis of these complex mixtures to identify the molecular components, to determine which enantiomers are present, and to measure the enantiomeric excesses (ee) remains a challenging task for analytical chemistry.
We recently experimentally demonstrated a new method of differentiating enantiomeric pairs of chiral molecules in the gas phase. It is based on broadband rotational spectroscopy and is a three-wave mixing process that involves a closed cycle of three rotational transitions. The phase of the acquired signal bares the signature of the enantiomer, as it depends upon the product of the transition dipole moments, and the signal amplitude is proportional to the ee. A unique advantage of our technique is that it can also be applied to mixtures of chiral molecules, even when the molecules are very similar. I will introduce the technique and give an update on the recent developments.
We recently experimentally demonstrated a new method of differentiating enantiomeric pairs of chiral molecules in the gas phase. It is based on broadband rotational spectroscopy and is a three-wave mixing process that involves a closed cycle of three rotational transitions. The phase of the acquired signal bares the signature of the enantiomer, as it depends upon the product of the transition dipole moments, and the signal amplitude is proportional to the ee. A unique advantage of our technique is that it can also be applied to mixtures of chiral molecules, even when the molecules are very similar. I will introduce the technique and give an update on the recent developments.
Practical information
- General public
- Free
Organizer
- Prof. Ulrich Lorenz
Contact
- Prof. Ulrich Lorenz