Fullerene C60 exhibiting a strong intermolecular interaction in a cocrystallite with C4 symmetrical cobalt tetrakis(di-tert-butylphenyl)porphyrin

Tomohiko Ishii; Ryo Kanehama; Naoko Aizawa; Masahiro Yamashita; Hiroyuki Matsuzaka; Ken-ichi Sugiura; Hitoshi Miyasaka; Takeshi Kodama; Kouichi Kikuchi; Isao Ikemoto; Hisaaki Tanaka; Kazuhiro Marumoto; Shin-Ichi Kuroda

doi:10.1039/B104514H

Fullerene C₆₀ exhibiting a strong intermolecular interaction in a cocrystallite with C₄ symmetrical cobalt tetrakis(di-tert-butylphenyl)porphyrin

Tomohiko Ishii,*^a Ryo Kanehama,^a Naoko Aizawa,^a Masahiro Yamashita,*^a Hiroyuki Matsuzaka,^a Ken-ichi Sugiura,^a Hitoshi Miyasaka,^a Takeshi Kodama,^a Kouichi Kikuchi,^a Isao Ikemoto,^a Hisaaki Tanaka,^b Kazuhiro Marumoto^b and Shin-Ichi Kuroda^b

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^a Department of Chemistry, Tokyo Metropolitan University & PRESTO (JST), 1-1 Minamiohsawa, Hachioji, Tokyo 192-0397, Japan
E-mail: mail@tishii.com; yamashit@comp.metro-u.ac.jp

^b Faculty of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan

Abstract

A new cocrystallite is reported which contains C₆₀ with the cobalt(II) complex 5,10,15,20-tetrakis[3,5-(di-tert-butyl)phenyl]porphyrin (tbp). The inter-molecular distance between C₆₀ and the Co^II(tbp) molecules in the cocrystallite Co^II(tbp)·C₆₀ is quite short, having a value of 2.61 Å at room temperature for any covalent bonding arrangement. This is the first report of X-ray structural analysis at room temperature of metal porphyrin cocrystallites with fullerenes. The temperature dependence of the inter-molecular interaction between C₆₀ and the Co^II(tbp) molecules has been investigated by ESR spectroscopy. C₄ symmetry of the C₆₀ molecule has been observed in this cocrystallite which can be explained by the disorder of the fullerene molecules in the crystal packing, caused by the strong inter-molecular interaction with the C₄ symmetrical molecule of Co^II(tbp). This cocrystallite forms one of the most attractive packing arrangements for molecular 3-D design based on the fullerene C₆₀.

Journal of the Chemical Society, Dalton Transactions

Fullerene C₆₀ exhibiting a strong intermolecular interaction in a cocrystallite with C₄ symmetrical cobalt tetrakis(di-tert-butylphenyl)porphyrin

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Fullerene C₆₀ exhibiting a strong intermolecular interaction in a cocrystallite with C₄ symmetrical cobalt tetrakis(di-tert-butylphenyl)porphyrin

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