Quadruple stacking of macrocyclic viologen radical-cations

Murray, Claire A, Zhu, Zhixue, Cardin, Christine J, Colquhoun, Howard M and Greenland, Barnaby W (2018) Quadruple stacking of macrocyclic viologen radical-cations. Supramolecular Chemistry, 30 (9). pp. 751-757. ISSN 1061-0278

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Abstract

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 e ect 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 attens 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
Schools and Departments: School of Life Sciences > Chemistry
Subjects: Q Science
Q Science > QD Chemistry > QD0241 Organic chemistry
Q Science > QD Chemistry > QD0901 Crystallography
Depositing User: Barnaby Greenland
Date Deposited: 07 Feb 2018 16:26
Last Modified: 17 Aug 2018 09:30
URI: http://sro.sussex.ac.uk/id/eprint/73408

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