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Quadruple stacking of macrocyclic viologen radical-cations

Murray, C. A., Zhu, Z., Cardin, C. J., Colquhoun, H. M. and Greenland, B. W. (2018) Quadruple stacking of macrocyclic viologen radical-cations. Supramolecular Chemistry, 30 (9). pp. 751-757. ISSN 1061-0278

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To link to this item DOI: 10.1080/10610278.2017.1375113

Abstract/Summary

The solid state structures of the di-cationic (1a) and radical mono-cationic (1b) redox forms of a 4,4′-bipyridinium (viologen) containing macrocycle have been established by single crystal X-ray analysis. Formation of the radical cation has a dramatic effect on the molecular structure of the macrocycle. Addition of an electron to 1a both decreases the diameter of the ring cavity (from 8.5 to 7.8 Å) and drastically flattens the torsion angle between the two pyridinium residues in the viologen, reducing it from 48° to either 3° or 9° (two independent molecules). Moreover, a close association of these near-planar radical cation units drives the formation of a tetrameric supramolecular structure in the solid state.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry
Interdisciplinary centres and themes > Chemical Analysis Facility (CAF) > Xray (CAF)
Faculty of Life Sciences > School of Chemistry, Food and Pharmacy > School of Pharmacy > Medicinal Chemistry Research Group
ID Code:72564
Publisher:Taylor & Francis

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