title: Lanthanide-ion-tuned magnetic properties in a series of three-dimensional cyano-bridged Ln(III)W(V) assemblies.
abstract: The reaction of [W(CN)(8)](3-) with Ln(3+) and pyrazine in acetonitrile yielded a series of isostructural compounds formulated as Ln(H(2)O)(4)(pyrazine)(0.5)W(CN)(8) (Ln = La(1), Ce(2), Pr(3), Nd(4), Sm(5), Eu(6), Gd(7)). The Ln(III) and W(V) centers in the structure are linked through cyanide groups to form two-dimensional (2D) layers, which are further pillared by pyrazine, generating 3D frameworks. The magnetic behavior for compounds 1-7 were driven by the lanthanide ions involved. The Ln(III) and W(V) ions in compounds 2 and 5 are ferromagnetically coupled with magnetic ordering occurring at 2.8 K, comparable with magnetic ordering with the critical temperature of 1.9 K for compound 4. In addition, the antiferromagnetic interactions were observed in compounds 3 and 7, while no significant magnetic couplings were found in compounds 1 and 6.
authors: College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China.
authors: Hu
authors: H
authors: Zhou
authors: Guo-Wang
authors: GW
authors: Diao
authors: Su-Yan
authors: SY
authors: Qian
authors: Xiao-Zhen
authors: XZ
authors: Yang
authors: Ai-Hua
authors: AH
authors: Yuan
authors: You
authors: Y
authors: Song
authors: Yi-Zhi
authors: YZ
authors: Li