Mixed-stack organic charge-transfer complexes with intercolumnar networks

T. Hasegawa, T. Mochida, Ryusuke Kondo, S. Kagoshima, Y. Iwasa, T. Akutagawa, T. Nakamura, G. Saito

Research output: Contribution to journalArticle

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Abstract

We report synthesis and examination of the electronic properties of an isomorphous series of mixed-stack organic charge-transfer complexes, composed of [bis(ethylenedithio)tetrathiafulvalene] (BEDT-TTF)-based electron donors and electron acceptors of halogen-substituted tetracyanoquinodimethanes (TCNQ's). Single crystals of (BEDT-TTF)(Me2TCNQ), (BEDT-TTF)(ClMeTCNQ), and (BEDO-TTF)(Cl2TCNQ) were investigated as to their crystal structures, and optical and magnetic properties. The intermolecular overlaps between the stacked columns were comparable to the face-to-face overlap between the donor and the acceptor molecules inside the stacks. As seen from the optical and magnetic measurements, the (BEDT-TTF)(Me2TCNQ) and (BEDT-TTF)(ClMeTCNQ) complexes were neutral, while the (BEDO-TTF)(Cl2TCNQ) complex was found to be ionic. Among these complexes, anomalous magnetic properties were observed in the ionic complex of (BEDO-TTF)(Cl2TCNQ). (BEDO-TTF)(Cl2TCNQ) is a magnetic insulator with Curie-Weiss behavior in magnetic susceptibility followed by a sharp drop at around 120 K, which is in sharp contrast to conventional "spin-Peierls-type" nonmagnetic mixed-stack ionic compounds.

Original languageEnglish
Pages (from-to)10059-10066
Number of pages8
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume62
Issue number15
DOIs
Publication statusPublished - Oct 15 2000
Externally publishedYes

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Charge transfer
Magnetic properties
charge transfer
Electrons
Magnetic variables measurement
Magnetic susceptibility
Electronic properties
magnetic properties
Optical properties
Crystal structure
Single crystals
optical measurement
halogens
Molecules
magnetic measurement
electrons
examination
Halogens
insulators
magnetic permeability

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Mixed-stack organic charge-transfer complexes with intercolumnar networks. / Hasegawa, T.; Mochida, T.; Kondo, Ryusuke; Kagoshima, S.; Iwasa, Y.; Akutagawa, T.; Nakamura, T.; Saito, G.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 62, No. 15, 15.10.2000, p. 10059-10066.

Research output: Contribution to journalArticle

Hasegawa, T, Mochida, T, Kondo, R, Kagoshima, S, Iwasa, Y, Akutagawa, T, Nakamura, T & Saito, G 2000, 'Mixed-stack organic charge-transfer complexes with intercolumnar networks', Physical Review B - Condensed Matter and Materials Physics, vol. 62, no. 15, pp. 10059-10066. https://doi.org/10.1103/PhysRevB.62.10059
Hasegawa, T. ; Mochida, T. ; Kondo, Ryusuke ; Kagoshima, S. ; Iwasa, Y. ; Akutagawa, T. ; Nakamura, T. ; Saito, G. / Mixed-stack organic charge-transfer complexes with intercolumnar networks. In: Physical Review B - Condensed Matter and Materials Physics. 2000 ; Vol. 62, No. 15. pp. 10059-10066.
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