Self-assembly and characterization of cyano-bridged bimetallic [Ln-Fe] and [Ln-Co] complexes (Ln = La, Pr, Nd and Sm). Nature of the magnetic interactions between the Ln(3+) and Fe(3+) ions

Wen-Tong Chen; Guo-Cong Guo; Ming-Sheng Wang; Gang Xu; Li-Zhen Cai; Takashiro Akitsu; Motoko Akita-Tanaka; Akiyuki Matsushita; Jin-Shun Huang

doi:10.1021/ic061609p

Self-assembly and characterization of cyano-bridged bimetallic [Ln-Fe] and [Ln-Co] complexes (Ln = La, Pr, Nd and Sm). Nature of the magnetic interactions between the Ln(3+) and Fe(3+) ions

Inorg Chem. 2007 Mar 19;46(6):2105-14. doi: 10.1021/ic061609p. Epub 2007 Feb 14.

Authors

Wen-Tong Chen¹, Guo-Cong Guo, Ming-Sheng Wang, Gang Xu, Li-Zhen Cai, Takashiro Akitsu, Motoko Akita-Tanaka, Akiyuki Matsushita, Jin-Shun Huang

Affiliation

¹ State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China.

PMID: 17298053
DOI: 10.1021/ic061609p

Abstract

Two structural series, including seven isomorphous heterodinuclear complexes, [Ln(DMSO)4(H2O)3(mu-CN)M(CN)5].H2O ([La-Fe] (1), [Pr-Fe] (2), [Pr-Co] (3), [Nd-Fe] (4), [Nd-Co] (5), [Sm-Fe] (6) and [Sm-Co] (7)), and seven isostructural 2-D stair-like cyano-bridged bimetallic assemblies, [Ln(DMSO)2(H2O)(mu-CN)4M(CN)2]n ([La-Fe]n (8), [Pr-Fe]n (9), [Pr-Co]n (10), [Nd-Fe]n (11), [Nd-Co]n (12), [Sm-Fe]n (13) and [Sm-Co]n (14)) (DMSO = dimethylsulfoxide), have been rationally prepared by a facile approach, a ball-milling method, and characterized by X-ray diffraction and magnetic measurements. The isomorphous structures, in conjunction with the diamagnetism of the Co(3+) and La(3+) ions, allow an approximation to the nature of coupling between the iron(III) and lanthanide(III) ions in the Ln(3+)-Fe(3+) complexes. The Ln(3+)-Fe(3+) interaction is ferromagnetic for the dinuclear [Pr-Fe] (2), [Nd-Fe] (4), and [Sm-Fe] (6) systems and for the 2-D [Pr-Fe]n (9), [Nd-Fe]n (11), and [Sm-Fe]n (13) assemblies.