Crystals 2012, 2(3), 946-957; doi:10.3390/cryst2030946
Article

Metallic One-Dimensional Conductors Composed of Axially Ligated (Phthalocyanato)CoIII with Supramolecular Cations of A(EtOH)4 (A = Na and K)

Yasuhiro Tanaka † email, Manabu Ishikawa ‡ email, Naoko Watanabe § email, Yukihiro Takahashiemail, Toshio Naito || email and Tamotsu Inabe* email
Department of Chemistry, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan † Current address: Yamamoto Precious Metal Co., Ltd., Konan 781-5451, Japan. ‡ Current address: Research Center for Low Temperature and Materials Sciences, Kyoto University, Kyoto 606-8502, Japan. § Current address: NTT Software Corporation, Nishiki, Naka-ku, Nagoya 460-0003, Japan. || Current address: Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan.
* Author to whom correspondence should be addressed.
Received: 21 February 2012; in revised form: 29 June 2012 / Accepted: 3 July 2012 / Published: 10 July 2012
(This article belongs to the Special Issue Molecular Conductors)
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Abstract: Electrolysis of Na and K salts of the anion dicyano(phthalocyaninato)cobalt(III) (Co(Pc)(CN)2) in ethanol yields one-dimensional partially oxidized salts of A[Co(Pc)(CN)2]2.4(EtOH) (A = Na and K). The cationic component is the supramolecular cation [A(EtOH)4]+, which forms hydrogen bonds with the CN ligands of the Co(Pc)(CN)2 units. The crystal shows metallic conductivity, in contrast to the thermally activated conductivity observed in the isomorphous tetraphenylphosphonium (TPP) salt of TPP[Co(Pc)(CN)2]2. Since the π-π interactions in these isomorphous crystals are nearly the same, the distinctive behavior of the Na and K salts may be attributed to the difference in the degree of charge disproportionation in these crystals.
Keywords: phthalocyanine; partially oxidized salt; hydrogen bond; one-dimensional conductor; charge disproportionation

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MDPI and ACS Style

Tanaka, Y.; Ishikawa, M.; Watanabe, N.; Takahashi, Y.; Naito, T.; Inabe, T. Metallic One-Dimensional Conductors Composed of Axially Ligated (Phthalocyanato)CoIII with Supramolecular Cations of A(EtOH)4 (A = Na and K). Crystals 2012, 2, 946-957.

AMA Style

Tanaka Y, Ishikawa M, Watanabe N, Takahashi Y, Naito T, Inabe T. Metallic One-Dimensional Conductors Composed of Axially Ligated (Phthalocyanato)CoIII with Supramolecular Cations of A(EtOH)4 (A = Na and K). Crystals. 2012; 2(3):946-957.

Chicago/Turabian Style

Tanaka, Yasuhiro; Ishikawa, Manabu; Watanabe, Naoko; Takahashi, Yukihiro; Naito, Toshio; Inabe, Tamotsu. 2012. "Metallic One-Dimensional Conductors Composed of Axially Ligated (Phthalocyanato)CoIII with Supramolecular Cations of A(EtOH)4 (A = Na and K)." Crystals 2, no. 3: 946-957.

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