Electrical properties and electronic states of molecular conductors based on unsymmetrical organometallic-dithiolene gold(III) complexes

Kazuya Kubo, Akiko Nakao, Yasuyuki Ishii, Takashi Yamamoto, Masafumi Tamura, Reizo Kato, Kyuya Yakushi, Gen Etsu Matsubayashi

研究成果: Article

13 引用 (Scopus)

抄録

The electronic properties of cation radical salts derived from organometallic mixed-ligand complexes [(ppy)Au(S-S)] (ppy- = C-dehydro-2-phenylpyridine(-); S-S2- = dithiolene ligand) with Au(III)-C σ-bond were investigated. A 2:1 salt complex [(ppy)Au(C 8H4S8)]2[PF6] (C 8H4S82- = 2-{(4,5-ethylenedithio)-1, 3-dithiole-2-ylidene}-1,3-dithiole-4,5-dithiolate(2-)) exhibited semiconductive behavior under ambient pressure (ρrt = 2.6 Ω cm, E a = 0.03 eV). Magnetic measurements show that it is a Mott insulator close to the metal-insulator boundary. Raman and infrared spectra have revealed that the complex has a quasi-one-dimensional dimeric structure consisting of uniformly charged donor molecules. The complex exhibits metallic behavior at pressures above 0.8 GPa. In contrast, a similar compound [(ppy)Au(C 8H4S6O2)]2[BF 4] (C8H4S6O22- = 2-{(4,5-ethylenedioxy)-1,3-dithiole-2-ylidene}-1,3-dithiole-4,5-dithiolate(2- )) is a band insulator.

元の言語English
ページ(範囲)5495-5502
ページ数8
ジャーナルInorganic Chemistry
47
発行部数12
DOI
出版物ステータスPublished - 2008 6 16
外部発表Yes

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Electronic states
Organometallics
Gold
Metal insulator boundaries
Electric properties
conductors
Salts
electrical properties
insulators
gold
Ligands
Magnetic variables measurement
electronics
Electronic properties
salts
Cations
ligands
Infrared radiation
Molecules
magnetic measurement

ASJC Scopus subject areas

  • Inorganic Chemistry

これを引用

Electrical properties and electronic states of molecular conductors based on unsymmetrical organometallic-dithiolene gold(III) complexes. / Kubo, Kazuya; Nakao, Akiko; Ishii, Yasuyuki; Yamamoto, Takashi; Tamura, Masafumi; Kato, Reizo; Yakushi, Kyuya; Matsubayashi, Gen Etsu.

:: Inorganic Chemistry, 巻 47, 番号 12, 16.06.2008, p. 5495-5502.

研究成果: Article

Kubo, Kazuya ; Nakao, Akiko ; Ishii, Yasuyuki ; Yamamoto, Takashi ; Tamura, Masafumi ; Kato, Reizo ; Yakushi, Kyuya ; Matsubayashi, Gen Etsu. / Electrical properties and electronic states of molecular conductors based on unsymmetrical organometallic-dithiolene gold(III) complexes. :: Inorganic Chemistry. 2008 ; 巻 47, 番号 12. pp. 5495-5502.
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abstract = "The electronic properties of cation radical salts derived from organometallic mixed-ligand complexes [(ppy)Au(S-S)] (ppy- = C-dehydro-2-phenylpyridine(-); S-S2- = dithiolene ligand) with Au(III)-C σ-bond were investigated. A 2:1 salt complex [(ppy)Au(C 8H4S8)]2[PF6] (C 8H4S82- = 2-{(4,5-ethylenedithio)-1, 3-dithiole-2-ylidene}-1,3-dithiole-4,5-dithiolate(2-)) exhibited semiconductive behavior under ambient pressure (ρrt = 2.6 Ω cm, E a = 0.03 eV). Magnetic measurements show that it is a Mott insulator close to the metal-insulator boundary. Raman and infrared spectra have revealed that the complex has a quasi-one-dimensional dimeric structure consisting of uniformly charged donor molecules. The complex exhibits metallic behavior at pressures above 0.8 GPa. In contrast, a similar compound [(ppy)Au(C 8H4S6O2)]2[BF 4] (C8H4S6O22- = 2-{(4,5-ethylenedioxy)-1,3-dithiole-2-ylidene}-1,3-dithiole-4,5-dithiolate(2- )) is a band insulator.",
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AB - The electronic properties of cation radical salts derived from organometallic mixed-ligand complexes [(ppy)Au(S-S)] (ppy- = C-dehydro-2-phenylpyridine(-); S-S2- = dithiolene ligand) with Au(III)-C σ-bond were investigated. A 2:1 salt complex [(ppy)Au(C 8H4S8)]2[PF6] (C 8H4S82- = 2-{(4,5-ethylenedithio)-1, 3-dithiole-2-ylidene}-1,3-dithiole-4,5-dithiolate(2-)) exhibited semiconductive behavior under ambient pressure (ρrt = 2.6 Ω cm, E a = 0.03 eV). Magnetic measurements show that it is a Mott insulator close to the metal-insulator boundary. Raman and infrared spectra have revealed that the complex has a quasi-one-dimensional dimeric structure consisting of uniformly charged donor molecules. The complex exhibits metallic behavior at pressures above 0.8 GPa. In contrast, a similar compound [(ppy)Au(C 8H4S6O2)]2[BF 4] (C8H4S6O22- = 2-{(4,5-ethylenedioxy)-1,3-dithiole-2-ylidene}-1,3-dithiole-4,5-dithiolate(2- )) is a band insulator.

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