[Fe(bpb)(CN)2]- as a versatile building block for the design of novel low-dimensional heterobimetallic systems: Synthesis, crystal structures, and magnetic properties of cyano-bridged FeIII-Ni II complexes [(bpb)2- = 1,2-bis(pyridine-2-carboxamido) benzenate]

Zhong Hai Ni, Hui Zhong Kou, Yi Hua Zhao, Lei Zheng, Ru Ji Wang, Ai Li Cui, Osamu Sato

研究成果: Contribution to journalArticle査読

99 被引用数 (Scopus)

抄録

A dicyano-containing [Fe(bpb)(CN)2]- building block has been employed for the synthesis of cyano-bridged heterometallic Ni II-FeIII complexes. The presence of steric bpb 2- ligand around the iron ion results in the formation of low-dimensional species: five are neutral NiFe2 trimers and three are one-dimensional (1D). The structure of the 1D complexes consists of alternating [NiL]2+ and [Fe(bpb)(CN)2]- generating a cyano-bridged cationic polymeric chain and the perchlorate as the counteranion. In all complexes, the coordination geometry of the nickel ions is approximately octahedral with the cyano nitrogen atoms at the trans positions. Magnetic studies of seven complexes show the presence of ferromagnetic interaction between the metal ions through the cyano bridges. Variable temperature magnetic susceptibility investigations of the trimeric complexes yield the following JNiFe values (based on the spin exchange Hamiltonian H =-2J NiFeSNi(SFe(1) + SFe(2)): J NiFe = 6.40(5), 7.8(1), 8.9(2), and 6.03(4) cm-1, respectively. The study of the magneto-structural correlation reveals that the cyanide-bridging bond angle is related to the strength of magnetic exchange coupling: the larger the Ni-N≡C bond angle, the stronger the Ni⋯Fe magnetic interaction. One 1D complex exhibits long-range antiferromagnetic ordering with TN = 3.5 K. Below TN (1.82 K), a metamagnetic behavior was observed with the critical field of ∼6 kOe. The present research shows that the [Fe(bpb)(CN)2]- building block is a good candidate for the construction of low-dimensional magnetic materials.

本文言語英語
ページ(範囲)2050-2059
ページ数10
ジャーナルInorganic chemistry
44
6
DOI
出版ステータス出版済み - 3 21 2005
外部発表はい

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

フィンガープリント 「[Fe(bpb)(CN)<sub>2</sub>]<sup>-</sup> as a versatile building block for the design of novel low-dimensional heterobimetallic systems: Synthesis, crystal structures, and magnetic properties of cyano-bridged Fe<sup>III</sup>-Ni <sup>II</sup> complexes [(bpb)<sup>2-</sup> = 1,2-bis(pyridine-2-carboxamido) benzenate]」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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