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Zeitschrift für Naturforschung A

A Journal of Physical Sciences

Editor-in-Chief: Holthaus, Martin

Editorial Board: Fetecau, Corina / Kiefer, Claus


IMPACT FACTOR 2016: 1.432

CiteScore 2017: 1.30

SCImago Journal Rank (SJR) 2017: 0.403
Source Normalized Impact per Paper (SNIP) 2017: 0.632

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1865-7109
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Volume 44, Issue 9

Issues

Conductivity and Magnetic Properties of the Charge-Transfer Complex from N,N'-Dicyanonaphthoquinonedimimine (DCNNI)and Tetrathiafulvalene (TTF)

H.-P. Werner / W. Grauf / J. U. von Schütz / H. C. Wolf / H. W. Helberg
  • 3. Physikalisches Institut, Universität Göttingen, Biirgerstr. 42 44, D-3400 Göttingen, West-Germany
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ W. Kremer
  • 3. Physikalisches Institut, Universität Göttingen, Biirgerstr. 42 44, D-3400 Göttingen, West-Germany
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ A. Aumüller
  • Institut für Organische Chemie, Universität Würzburg, Am Hubland, D-8700 Würzburg, West-Germany
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  • De Gruyter OnlineGoogle Scholar
/ S. Hünig
  • Institut für Organische Chemie, Universität Würzburg, Am Hubland, D-8700 Würzburg, West-Germany
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2014-06-02 | DOI: https://doi.org/10.1515/zna-1989-0909

Abstract

Conductivity (dc and ac), ESR-properties and proton relaxation rates of the charge transfer complex Tetrathiafulvalene N,N′-dicyanonaphthoquinonediimine in the temperature range be­ tween 300 K and 3.8 K are reported. This salt belongs to the unusual group of organic conductors, in which segregated donor and acceptor stacks are associated in a pairwise manner. The physical properties, which are compared with TTF-TCNQ, give evidence of non-stoichiometric charge transfer (ρ ≠ 1). A metal like state can be identified for T> 70 K, as is seen from the weak temper­ ature dependence of the conductivity (σrt ≈ 30 Scm-1) and the susceptibility (Xrt ≈ 7.5 ⋅ 10-4 emu/ mole) and from the Korringa like temperature dependence of the proton relaxation rates. The drop of the susceptibility at Tc ≈ 70 K and the activated temperature dependence of the conductivity for T < 70 K are explained by a metal-to-semiconductor transition.

About the article

Received: 1989-07-17

Published Online: 2014-06-02

Published in Print: 1989-09-01


Citation Information: Zeitschrift für Naturforschung A, Volume 44, Issue 9, Pages 825–832, ISSN (Online) 1865-7109, ISSN (Print) 0932-0784, DOI: https://doi.org/10.1515/zna-1989-0909.

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© 1946 – 2014: Verlag der Zeitschrift für Naturforschung. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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