title: Efficient access to conjugated 4,4'-bipyridinium oligomers using the Zincke reaction: synthesis, spectroscopic and electrochemical properties.
abstract: The cyclocondensation reaction between rigid, electron-rich aromatic diamines and 1,1'-bis(2,4-dinitrophenyl)-4,4'-bipyridinium (Zincke) salts has been harnessed to produce a series of conjugated oligomers containing up to twelve aromatic/heterocyclic residues. These oligomers exhibit discrete, multiple redox processes accompanied by dramatic changes in electronic absorption spectra.
authors.affiliation: Department of Chemistry, University of Reading, Whiteknights, Reading, RG6 6AD, UK. h.m.colquhoun@reading.ac.uk.
authors.forename: Long
authors.initials: L
authors.lastname: Chen
authors.forename: Helen
authors.initials: H
authors.lastname: Willcock
authors.forename: Christopher J
authors.initials: CJ
authors.lastname: Wedge
authors.forename: František
authors.initials: F
authors.lastname: Hartl
authors.forename: Howard M
authors.initials: HM
authors.lastname: Colquhoun
authors.forename: Barnaby W
authors.initials: BW
authors.lastname: Greenland