Interactions between tetrathiafulvalene units in dimeric structures – the influence of cyclic cores

Huixin Jiang, Virginia Mazzanti, Christian Richard Parker, Søren Lindbæk Broman, Jens Heide Wallberg, Karol Luspai, Adam Brincko, Henrik Grum Kjærgaard, Anders Kadziola, Peter Rapta, Ole Hammerich, Mogens Brøndsted Nielsen

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Abstract

A selection of cyclic and acyclic acetylenic scaffolds bearing two tetrathiafulvalene (TTF) units was prepared by different metal-catalyzed coupling reactions. The bridge separating the two TTF units was systematically changed from linearly conjugated ethyne, butadiyne and tetraethynylethene (trans-substituted) units to a cross-conjugated tetraethynylethene unit, placed in either acyclic or cyclic arrangements. The cyclic structures correspond to so-called radiaannulenes having both endo- and exocyclic double bonds. Interactions between two redox-active TTF units in these molecules were investigated by cyclic voltammetry, UV - vis - NIR and EPR absorption spectroscopical methods of the electrochemically generated oxidized species. The electron-accepting properties of the acetylenic cores were also investigated electrochemically.

OriginalsprogEngelsk
TidsskriftBeilstein Journal of Organic Chemistry
Vol/bind11
Sider (fra-til)930-948
Antal sider19
ISSN2195-951X
DOI
StatusUdgivet - 2 jun. 2015

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