Electronic coupling mediated by furan, thiophene, selenophene and tellurophene in a homologous series of organic mixed valence compounds.

Ann Christin Jahnke,Markus Neuburger,Oliver S Wenger,Cornelia G Palivan,Mariana Spulber

doi:10.1039/c4cc03806a

Ann Christin Jahnke, Markus Neuburger + Show 3 more

Open Access

https://doi.org/10.1039/c4cc03806a

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Abstract

Charge delocalization in the mixed-valent monocationic forms of phenothiazine-decorated chalcogenophenes is explored by cyclic voltammetry, optical absorption and EPR spectroscopy. Single units of furan, thiophene, selenophene and tellurophene are found to mediate electronic coupling between the phenothiazines attached to their 2- and 5-positions roughly equally well. Electronic communication seems to occur mostly through the butadiene-like backbone of the chalcogenophenes.

Highlights

Charge delocalization in the mixed-valent monocationic forms of phenothiazine-decorated chalcogenophenes is explored by cyclic voltammetry, optical absorption and EPR spectroscopy
Charge transport in oligomers and charge delocalization in monomers are different issues, but in order to tailor the properties of an oligomer or polymer it seems desirable to understand the electronic structure of its monomeric building blocks as detailed as possible
Mixed valence compounds have been frequently employed for exploration of charge delocalization phenomena, and both metalbased as well as purely organic redox-active units have been used for this purpose.[6]

Summary

Introduction

Charge delocalization in the mixed-valent monocationic forms of phenothiazine-decorated chalcogenophenes is explored by cyclic voltammetry, optical absorption and EPR spectroscopy. Thiophene, selenophene and tellurophene are found to mediate electronic coupling between the phenothiazines attached to their 2- and 5-positions roughly well.

Results

Conclusion