Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 60, Issue 33, Pages 17861-17865Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202107150
Keywords
amino acids; chirality; circular dichroism; mass spectrometry
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Funding
- Fonds der Chemischen Industrie (FCI) through a Kekule scholarship
- Projekt DEAL
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This study demonstrates that combining electrospray ionization (ESI) with detection of photoelectron circular dichroism (PECD) can provide access to chirality information applicable to molecular materials with negligible vapor pressure. This technique is expected to be conceptually applicable to all chemical systems with chirality based on molecular properties.
The chirality of chemical compounds is of undisputed importance in science and technology. In particular with respect to pharmacological application most molecules of interest cannot be accessed by the powerful techniques developed in recent years for gas phase analytes. Here, we demonstrate that the combination of electrospray ionization (ESI) with the detection of photoelectron circular dichroism (PECD) provides access to chirality information applicable to molecular materials with negligible vapor pressure, for example, amino acids. To this end, glutamic acid and 3,4-dihydroxyphenylalanine (DOPA) have been electrosprayed into the source of a chirality spectrometer, where photodetachment is enforced and the PECD is detected. The technique can be expected to be conceptually applicable to all chemical systems with chirality based on molecular properties.
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