title: Synthesis, Structure, and Properties of the Fullerene C60 Salt of Crystal Violet, (CV(+) )(C60 (.-) )⋅0.5 C6 H4 Cl2 , which Contained Closely Packed Zigzagged C60 (.-) Chains.
abstract: The reduction of fullerene C60 by zinc dust in the presence of crystal violet cations (CV(+) ) yielded a deep-blue solution, from which crystals of (CV(+) )(C60 (.-) )⋅0.5 C6 H4 Cl2 (1) were obtained by slow mixing with n-hexane. The salt contained isolated, closely packed zigzagged chains that were composed of C60 (.-) radical anions with a uniform interfullerene center-to-center distance of 9.98 Å. In spite of the close proximity of the fullerenes, they did not dimerize, owing to spatial separation by the phenyl substituents of CV(+) . The room-temperature conductivity of compound 1 was 3×10(-2)  S cm(-1) along the fullerene chains. The salt exhibited semiconducting behavior, with an activation energy of Ea =167 meV. Spins localized on C60 (.-) were antiferromagnetically coupled within the fullerene chains, with a Weiss temperature of -19 K without long-range magnetic ordering down to 1.9 K.
authors.affiliation: Institute of Problems of Chemical Physics, Russian Academy of Sciences (RAS), Chernogolovka, Moscow Region, 142432, Russia. konarev@icp.ac.ru.
authors.forename: Dmitri V
authors.initials: DV
authors.lastname: Konarev
authors.affiliation: Institute of Solid State Physics, Russian Academy of Sciences (RAS), Chernogolovka, Moscow Region, 142432, Russia.
authors.forename: Alexey V
authors.initials: AV
authors.lastname: Kuzmin
authors.affiliation: Institute of Solid State Physics, Russian Academy of Sciences (RAS), Chernogolovka, Moscow Region, 142432, Russia.
authors.forename: Salavat S
authors.initials: SS
authors.lastname: Khasanov
authors.affiliation: Research Center for Low Temperature and Materials Sciences, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan.
authors.forename: Manabu
authors.initials: M
authors.lastname: Ishikawa
authors.affiliation: Research Center for Low Temperature and Materials Sciences, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan.
authors.forename: Akihiro
authors.initials: A
authors.lastname: Otsuka
authors.affiliation: Research Center for Low Temperature and Materials Sciences, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan.
authors.forename: Hideki
authors.initials: H
authors.lastname: Yamochi
authors.affiliation: Faculty of Agriculture, Meijo University, 1-501 Shiogamaguchi, Tempaku-ku, Nagoya, 468-8502, Japan.|Toyota Physical and Chemical Research Institute, 41-1, Yokomichi, Nagakute, Aichi, 480-1192, Japan.
authors.forename: Gunzi
authors.initials: G
authors.lastname: Saito
authors.affiliation: Institute of Problems of Chemical Physics, Russian Academy of Sciences (RAS), Chernogolovka, Moscow Region, 142432, Russia.
authors.forename: Rimma N
authors.initials: RN
authors.lastname: Lyubovskaya
keywords: antiferromagnetic interactions; crystal violet; fullerenes; magnetic properties; radicals