Author
U. Langohr
Bio: U. Langohr is an academic researcher from University of Stuttgart. The author has contributed to research in topics: Copper & Acceptor. The author has an hindex of 8, co-authored 24 publications receiving 278 citations.
Topics: Copper, Acceptor, Redox, Rietveld refinement, Diimine
Papers
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TL;DR: In this article, anion radical salts [2-R 1,5-R 3 -DCNQI] m M n (M=metal or organic cation) are described, which are derived from the newly introduced class of acceptors, N,N′-dicyanoquinonediimines.
43 citations
43 citations
40 citations
TL;DR: In this paper, a series of X,Y-N,N′-DCNQI salts with metallic counterions are presented (X,Y = H, CH3 ≡ Me, Cl, Br, I), and the comparison of conductivity, ESR (linewidth and susceptibility) and NMR (Proton spin relaxation) of these radical anions salts indicates that all salts can be separated into two groups: salts containing copper as counterion, which can be characterised as organic metals (at least at high temperatures); and salts with other counterions, whose
39 citations
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TL;DR: The gegenseitige Durchdringung der Adamantaneinheiten zweier diamantartiger Netze gezeigt in this paper lassen sich unter anderem weitreichende Folgerungen fur das Kristall-Engineering ableiten.
Abstract: Unaufloslich ineinander verwoben sind in vielen Festkorperstrukturen von polymeren, uber H-Brucken gebundenen Netzen und von Koordinationspolymeren die als voneinander unabhangig betrachteten ein-, zwei- oder gar dreidimensionalen Netzstrukturen. Rechts ist z. B. die gegenseitige Durchdringung der Adamantaneinheiten zweier diamantartiger Netze gezeigt. Aus der detaillierten Beschreibung und Systematik der mehrfachen gegenseitigen Durchdringung von derartigen Netzen in Festkorperstrukturen lassen sich unter anderem weitreichende Folgerungen fur das Kristall-Engineering ableiten.
334 citations
TL;DR: In this article, the structural and electronic properties of polynitrile ligands are discussed, including their propensity to undergo π/π stacking, their non-innocent nature, and their ability to bridge several metal centers.
281 citations
TL;DR: One of the clear manifestations of electron correlation in condensed matter is metal-insulator (MI) transition as discussed by the authors, and the organic conductors κ-(ET) 2 X and (DCNQI) 2 M are contrasting textbook materials.
Abstract: One of the clear manifestations of electron correlation in condensed matter is metal–insulator (MI) transition. The organic conductors κ-(ET) 2 X and (DCNQI) 2 M are contrasting textbook materials ...
204 citations
171 citations
TL;DR: The BEDO-TTF molecule proves to be an excellent source for stable metals irrespective of the structure, shape, size, and electron affinity of counter components as discussed by the authors, and the crystal structure of metallic BEDDO-T TF complexes indicates a strong aggregation of donor molecules into a two-dimensional (2D) layered structure by the aid of both intermolecular CH···O and side-by-side heteroatom contacts.
Abstract: The complex formation of bis(ethylenedioxy)tetrathiafulvalene (BEDO-TTF) with 29 organic electron acceptors and six organic anions yielded 37 charge-transfer (CT) complexes, about three-quarters of which exhibited metallic behavior. The BEDO-TTF molecule proves to be an excellent source for stable metals irrespective of the structure, shape, size, and electron affinity of counter components. The crystal structure of metallic BEDO-TTF complexes indicates a strong aggregation of donor molecules into a two-dimensional (2D) layered structure by the aid of both intermolecular CH···O and side-by-side heteroatom contacts. Band calculations based on an extended Huckel method demonstrate that the sulfur atoms of the BEDO-TTF molecule are dominant for 2D intermolecular overlap. The resulting 2D electronic bands with large band width serve to stabilize the metallic state even at low temperatures. A comparison between the structural properties of complexes of BEDO-TTF and those of its sulfur analog BEDT-TTF (BEDT-TTF...
170 citations