Diastereomer Resolution of M4L6 Coordination Cages by Ultra‐High‐Resolution Ion‐Mobility Mass Spectrometry

Author:

Pfrunder Michael C.12,Marshall David L.13,Poad Berwyck L. J.123,Fulloon Therese M.12,Clegg Jack K.45,Blanksby Stephen J.123,McMurtrie John C.12,Mullen Kathleen M.12ORCID

Affiliation:

1. Centre for Materials Science (CMS) Queensland University of Technology (QUT) 2 George Street 4000 Brisbane Queensland Australia

2. School of Chemistry and Physics Queensland University of Technology 2 George Street 4000 Brisbane Queensland Australia

3. Central Analytical Research Facility (CARF) Queensland University of Technology 2 George Street 4000 Brisbane Queensland Australia

4. School of Chemistry and Molecular Biosciences The University of Queensland Cooper Road 4072 St Lucia Queensland Australia

5. Department of Chemistry University of Cambridge Lensfield Road Cambridge CB2 1EW UK

Abstract

AbstractCoordination cages can be used for enantio‐ and regioselective catalysis and for the selective sensing and separation of isomeric guest molecules. Here, stereoisomers of a family of coordination cages are resolved using ultra‐high‐resolution cyclic ion‐mobility mass spectrometry (cIM‐MS). The observed ratio of diastereomers is dependent on both the metal ion and counter ion. Moreover, the point groups can be assigned through complementary NMR experiments. This method enables the identification and interrogation of the individual isomers in complex mixtures of cages which cannot be performed in solution. Furthermore, these techniques allow the stability of individual isomers within the mixture to be probed, with the T‐symmetric isomers in this case shown to be more robust than the C3 and S4 analogues.

Funder

Centre for Materials Science, Queensland University of Technology

Australian Research Council

Publisher

Wiley

Subject

General Chemistry,Catalysis

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