DCNQIs—new electron acceptors for charge-transfer complexes and highly conducting radical anion salts


  • Prof. Siegfried Hünig,

    1. Institut für Organische Chemie, Universtät Würzburg, Am Hubland, W-8700 Würzburg (FRG)
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    • studied chemistry at the Technical University of Dresden gaining his Diploma in 1942 and being awarded the Dr.-Ing. degree in 1943. He then moved to Marburg and completed his Habilitation in 1950, staying on as Professor until 1960. After a brief stay at the University of Munich he became Professor and Director of the Institute for Organic Chemistry at the University of Würzburg in 1961 where he is now (since 1988) Emeritus Professor. He has published about 400 papers, and his many honors include the Adolf von Baeyer Medal of the German Chemical Society, the Literature Prize of the German Society of Chemical Industry, and honorary Doctorates from the Universities of Marburg and Munich.

  • Dr. Peter Erk

    1. Institut für Organische Chemie, Universtät Würzburg, Am Hubland, W-8700 Würzburg (FRG)
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    • Chemistry at the University of Würzburg. He took his Diploma degree in 1985 and stayed in the group of Prof. S. Hünigpreparing his doctorate work on molecular conductors based on DCNQIs for which he was awarded the Dr. rer. nat. degree in 1989. He then moved to Stanford University and worked as a postdoctora1, fellow in the group of Prof. J. P. Collman on magnetic metalloporphyrin dimers. Since April 1991 he has occupied a position at the Farben-labor of the BASF AC in Ludwigshafen, FRG.

  • We gratefully acknowledge the fruitful cooperation of all chemists, physicists and crystallographers involved in this project. Their names are listed in the literature references. We thank the fonds der chemischen industrie, the stiftung volkswagenwerk and the basf ag for financial support of this work. P. Erk thanks the Fonds der Chemischen Industrie for a Promotionsstipendium.


Review: Organic conducting materials show potential for applications in, for example, electrostatic shielding or in pressure sensing. In the past, research aimed at the optimization of the properties of these materials e.g. the charge-transfer (CT) complex tetrathiafulvalene/tetracyanoquinodümine (TTF/TCNQ, see figure) have concentrated mainly on varying the structure of the donor (TTF). Here, in contrast, the recent progress made in the identification, synthesis, and characterization of new acceptors suitable for use in CT complexes, the N,N'-dicyanoquinonediimines (DCNQIs) is reviewed.

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