Synchrotron-radiation photoemission study of in-situ synthesized DCNQI(N,N′-dicyanoquinonediimine)-Cu salts

Akinori Tanaka, Ashish Chainani, Tatsushi Miura, Takashi Takahashi, Takafumi Miyazaki, Shinji Hasegawa, Takehiko Mori

Research output: Contribution to journalArticle

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Abstract

A photoemission study using synchrotron radiation of in-situ synthesized organic conductors (DMe-DCNQI)2Cu and (MeBr-DCNQI)2Cu is reported, where DMe-DCNQI and MeBr-DCNQI are dimethyl-N,N′-dicyanoquinonediimine and methyl, bromine-N,N′-dicyanoquinonediimine, respectively. The photon energy dependence of the valence band spectra is used to characterize the origin of the observed features. In both salts, the Cu 3d derived states are situated at 3.5-4 eV binding energy, while the C and N 2pσ states appear around 7.5 eV. The Br 4p states are found around 5 eV in (MeBr-DCNQI)2Cu. The states near the Fermi level have substantial C and N 2pπ character consistent with extended Hückel molecular orbital calculations. The absence of a resonance at the Cu 3p threshold suggests a small contribution of Cu2+ configuration in DCNQI-Cu salts.

Original languageEnglish
Pages (from-to)1-5
Number of pages5
JournalSolid State Communications
Volume93
Issue number1
DOIs
Publication statusPublished - 1995
Externally publishedYes

Fingerprint

Photoemission
Synchrotron radiation
synchrotron radiation
photoelectric emission
Salts
Organic conductors
salts
Bromine
Orbital calculations
Molecular orbitals
bromine
Valence bands
Fermi level
Binding energy
molecular orbitals
Photons
conductors
binding energy
valence
thresholds

Keywords

  • 0511 photoelectron spectroscopy
  • chemical synthesis
  • electronic band structure
  • organic crystals
  • synchrotron radiation

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry
  • Condensed Matter Physics
  • Materials Science(all)

Cite this

Synchrotron-radiation photoemission study of in-situ synthesized DCNQI(N,N′-dicyanoquinonediimine)-Cu salts. / Tanaka, Akinori; Chainani, Ashish; Miura, Tatsushi; Takahashi, Takashi; Miyazaki, Takafumi; Hasegawa, Shinji; Mori, Takehiko.

In: Solid State Communications, Vol. 93, No. 1, 1995, p. 1-5.

Research output: Contribution to journalArticle

Tanaka, Akinori ; Chainani, Ashish ; Miura, Tatsushi ; Takahashi, Takashi ; Miyazaki, Takafumi ; Hasegawa, Shinji ; Mori, Takehiko. / Synchrotron-radiation photoemission study of in-situ synthesized DCNQI(N,N′-dicyanoquinonediimine)-Cu salts. In: Solid State Communications. 1995 ; Vol. 93, No. 1. pp. 1-5.
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abstract = "A photoemission study using synchrotron radiation of in-situ synthesized organic conductors (DMe-DCNQI)2Cu and (MeBr-DCNQI)2Cu is reported, where DMe-DCNQI and MeBr-DCNQI are dimethyl-N,N′-dicyanoquinonediimine and methyl, bromine-N,N′-dicyanoquinonediimine, respectively. The photon energy dependence of the valence band spectra is used to characterize the origin of the observed features. In both salts, the Cu 3d derived states are situated at 3.5-4 eV binding energy, while the C and N 2pσ states appear around 7.5 eV. The Br 4p states are found around 5 eV in (MeBr-DCNQI)2Cu. The states near the Fermi level have substantial C and N 2pπ character consistent with extended H{\"u}ckel molecular orbital calculations. The absence of a resonance at the Cu 3p threshold suggests a small contribution of Cu2+ configuration in DCNQI-Cu salts.",
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AU - Takahashi, Takashi

AU - Miyazaki, Takafumi

AU - Hasegawa, Shinji

AU - Mori, Takehiko

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N2 - A photoemission study using synchrotron radiation of in-situ synthesized organic conductors (DMe-DCNQI)2Cu and (MeBr-DCNQI)2Cu is reported, where DMe-DCNQI and MeBr-DCNQI are dimethyl-N,N′-dicyanoquinonediimine and methyl, bromine-N,N′-dicyanoquinonediimine, respectively. The photon energy dependence of the valence band spectra is used to characterize the origin of the observed features. In both salts, the Cu 3d derived states are situated at 3.5-4 eV binding energy, while the C and N 2pσ states appear around 7.5 eV. The Br 4p states are found around 5 eV in (MeBr-DCNQI)2Cu. The states near the Fermi level have substantial C and N 2pπ character consistent with extended Hückel molecular orbital calculations. The absence of a resonance at the Cu 3p threshold suggests a small contribution of Cu2+ configuration in DCNQI-Cu salts.

AB - A photoemission study using synchrotron radiation of in-situ synthesized organic conductors (DMe-DCNQI)2Cu and (MeBr-DCNQI)2Cu is reported, where DMe-DCNQI and MeBr-DCNQI are dimethyl-N,N′-dicyanoquinonediimine and methyl, bromine-N,N′-dicyanoquinonediimine, respectively. The photon energy dependence of the valence band spectra is used to characterize the origin of the observed features. In both salts, the Cu 3d derived states are situated at 3.5-4 eV binding energy, while the C and N 2pσ states appear around 7.5 eV. The Br 4p states are found around 5 eV in (MeBr-DCNQI)2Cu. The states near the Fermi level have substantial C and N 2pπ character consistent with extended Hückel molecular orbital calculations. The absence of a resonance at the Cu 3p threshold suggests a small contribution of Cu2+ configuration in DCNQI-Cu salts.

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