title: Electron-Transferred Donor/Acceptor Ferrimagnet with T(C) = 91 K in a Layered Assembly of Paddlewheel [Ru2] Units and TCNQ.
abstract: The donor (D)/acceptor (A) assembly reaction of the paddlewheel-type diruthenium(II,II) complex [Ru2(2,4,6-F3PhCO2)4(THF)2] (2,4,6-F3PhCO2(-) = 2,4,6-trifluorobenzoate; abbreviated hereafter as [Ru2]) with 7,7,8,8-tetracyano-p-quinodimethane (TCNQ) in a p-xylene/CH2Cl2 solvent system led to the formation of a two-dimensional layered compound, [{Ru2(2,4,6-F3PhCO2)4}2(TCNQ)]·2(p-xylene)·2CH2Cl2 (1). As expected from this D/A combination, 1 has a one-electron-transfer ionic state with the D(0.5+)2A(-) formulation. This state formally derives a heterospin state composed of S = 1 for [Ru(II,II)2], S = 3/2 for [Ru(II,III)2](+), and S = ½ for TCNQ(•-), possibly causing intralayer ferrimagnetic spin ordering. Most of these types of compounds have an antiferromagnetic ground state because of the coupling of ferrimagnetically ordered layers in dipole antiferromagnetic interactions. However, 1 became a three-dimensional ferrimagnet with T(C) = 91 K because of the presence of interlayer ferromagnetic interactions.
authors.affiliation: Institute for Materials Research, Tohoku University , 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan.|Department of Chemistry, Graduate School of Science, Tohoku University , 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan.
authors.forename: Wataru
authors.initials: W
authors.lastname: Kosaka
authors.affiliation: Department of Chemistry, Graduate School of Science, Tohoku University , 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan.
authors.forename: Hiroki
authors.initials: H
authors.lastname: Fukunaga
authors.affiliation: Institute for Materials Research, Tohoku University , 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan.|Department of Chemistry, Graduate School of Science, Tohoku University , 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan.
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Miyasaka