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Quadruple stacking of macrocyclic viologen radical-cations

journal contribution
posted on 2023-06-09, 11:58 authored by Claire A Murray, Zhixue Zhu, Christine J Cardin, Howard M Colquhoun, Barnaby GreenlandBarnaby Greenland
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.

History

Publication status

  • Published

File Version

  • Published version

Journal

Supramolecular Chemistry

ISSN

1061-0278

Publisher

Taylor & Francis

Issue

9

Volume

30

Page range

751-757

Department affiliated with

  • Chemistry Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2018-02-07

First Compliant Deposit (FCD) Date

2018-02-07

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