New dinuclear cobalt (II, III) and tetranuclear manganese (III) complexes assembled by a polydentate Schiff-base ligand: synthesis, structure and magnetic properties

被引：17

作者：

Zhu, Wanxia ^{[1
]}

Zhang, Sheng ^{[1
]}

Cui, Chengmei ^{[1
]}

Bi, Fuqiang ^{[2
]}

Ke, Hongshan ^{[1
]}

Xie, Gang ^{[1
]}

Chen, Sanping ^{[1
]}

机构：

[1] NW Univ Xian, Key Lab Synthet & Nat Funct Mol Chem, Shaanxi Key Lab Physicoinorgan Chem, Minist Educ,Coll Chem & Mat Sci, Xian 710069, Peoples R China

[2] Xian Modern Chem Res Inst, Xian 710065, Peoples R China

来源：

INORGANIC CHEMISTRY COMMUNICATIONS | 2014年 / 46卷

关键词：

Polydentate Schiff base ligand; Manganese; Cobalt; Structural characterization; Magnetic property; CLUSTERS; TRANSITION;

D O I：

10.1016/j.inoche.2014.06.019

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The reactions of 2-(((2-hydroxy-3-methoxyphenyl)methylene)amino)-2-(hydroxymethyl)-1,3-propanediol (H4L) and Mn(ClO4)(2)center dot 6H(2)O or Co(SCN)(2)center dot 3H(2)O in the presence of triethylamine in methanol led to the formation of two new complexes [Mn-4(III)(HL)(2)(H2L)(2)(CH3OH)(4)]center dot 4CH(3)OH center dot(ClO4)(2) (1) and [(CoCoIII)-Co-II(H2L)(2)(CH3OH)(SCN)]center dot 1.5CH(3)OH center dot 1.5H(2)O (2), respectively. According to structural data and magnetic properties tetranuclear complex 1 contains four homo-valence manganese (III) atoms, while in the binuclear complex 2 composed of hetero-valence bi- and trivalent cobalt (II, III) atoms. Weak antiferromagnetic exchange interactions between neighboring manganese ions in 1 have place. chi T-M for 2 was fitted using a model of isolated cobalt (II) ion with zero-field splitting parameters and the study confirms its mixed valence Co-II/Co-III nature. No slow magnetic relaxation effects were observed for both complexes in the absence of an applied dc magnetic field. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：315 / 319

页数：5

共 35 条

[1] Alkoxo bound monooxo- and dioxovanadium(V) complexes: Synthesis, characterization, x-ray crystal structures, and solution reactivity studies [J].