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Triply Branched Viologen Stars: Synthesis and Polymerization by Peripheral Benzyl Coupling (Eur. J. Org. Chem. 5/2012)
Author(s) -
Constantin VeronicaAlina,
Bongard Dirk,
Walder Lorenz
Publication year - 2012
Publication title -
european journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.825
H-Index - 155
eISSN - 1099-0690
pISSN - 1434-193X
DOI - 10.1002/ejoc.201290006
Subject(s) - viologen , chemistry , polymerization , electron , stars , photochemistry , polymer , molecule , branching (polymer chemistry) , star (game theory) , polymer chemistry , organic chemistry , physics , quantum mechanics , astronomy , astrophysics
The cover picture shows the synthesis of new star‐shaped oligoviologens (left to right), consisting of a trifold central branching unit and three linear branches (up to 5.8 nm long) of alternating benzyl (blue) and phenyl viologens (red). Up to 24 electrons can be injected into the viologen subunits at four well‐separated electrode potentials (green vertical region). The corresponding localized spin densities in a single short branch are shown in the grey region. Viologen stars with peripheral benzylic bromides are reductively cross‐linked to yield a polymer with persisting star subunits (brown region). The star‐shaped multielectron molecules are supposed to have potential applications as electron sponges, as switchable organic magnets, as nanometer‐sized components in composite nanomaterials, and so on. Details are discussed in the article by L. Walder et. al. on p. 913 ff.