Mainz 2017 – scientific programme

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MS: Fachverband Massenspektrometrie

MS 3: Resonance Ionization MS and others

MS 3.5: Talk

Tuesday, March 7, 2017, 12:30–12:45, RW 2

New insights into CD-REMPI-MS method — •Farinaz Mortaheb, Jörn Lepelmeier, Aras Kartouzian, Ulrich Boesl, and Ueli Heiz — Technical University of Munich, Chair of Physical Chemistry, Lichtenbergstraße 4, 85748 Garching, Germany

The importance of analytical methods, which give us the ability to have deeper, faster and more accurate information about the enantiomeric excess of mixtures of chiral molecules in different environments and conditions, is clear. CD-REMPI-MS is one such technique. Circular Dichroism (CD) effect is achieved by the different absorption of left and right circularly polarized light for chiral molecules. CD can be integrated into REMPI-MS, by circularly polarizing the excitation beam. Thus, CD-REMPI-MS becomes a sensitive method with the ability to give a mass- wavelength- and enantiomer selectivity in the analysis of chiral molecules, even in the mixture with achiral ones in the gas phase. Such a method can be employed to enantio-analyse the products of heterogeneous asymmetric catalytic processes. In the present work, 1-Phenylethanol is investigated. Using CD-REMPI-MS, anisotropy factors (g-value) of multiple vibronic transitions have been determined.

[1] C. Logé and U. Boesl, ChemPhysChem, 12 (2011) 1940-1947 [2] J.Lepelmeier, K. Titze, A. Kartouzian, U. Boesl, and U. Heiz, chemphyschem, 17 (2016)