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Octanuclear Mn(III)(6)Mn(II)Ln (Ln = Gd, Dy and Er) clusters with a novel core topology: syntheses, structures, and magnetic properties.
MedLine Citation:
PMID:  23377042     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Reactions of [Mn(6)O(2)(piv)(10)(py)(2.5)(piv)(1.5)], Ln(NO(3))(3)·6H(2)O and N-mdeaH(2) in MeCN in the presence of Me(3)SiCl generated a family of octanuclear Mn/Ln complexes [Mn(6)(III)Mn(II)Ln(N-mdea)(3)(N-mdeaH)(piv)(8)O(2)(OH)(3)(NO(3))(H(2)O)]·xCH(3)CN·xH(2)O [Ln = Gd (), Dy (), Er (), pivH = pivalic acid, N-mdeaH(2) = N-methyl diethanolamine]. Each complex possesses a [Mn(6)(III)Mn(II)Ln(μ(3)-O)(2)(μ(3)-OH)(3)](16+) core containing two butterfly-like subunits of [Mn(3)Ln(μ(3)-OH)(2)] and [Mn(4)(μ(3)-O)(2)] sharing a common vertex, and an outer Mn atom ligated to one of the subunits through a μ(3)-OH(-) ligand. The core topology represents a new Mn/Ln core type. The magnetic susceptibility study of indicates the presence of dominant antiferromagnetic interactions within the complexes. For complex , which contains an isotropic Gd(III) atom, fitting of the obtained M/(Nμ(B)) vs. H/T data gave S = 4, g = 1.90, and D = -0.31 cm(-1). The results were further supported by ac data. Complex exhibits out-of-phase ac susceptibility signals, indicating it may be a SMM.
Authors:
Hui Chen; Cheng-Bing Ma; Ming-Qiang Hu; Hui-Min Wen; Hong-Hua Cui; Jin-Ying Liu; Xiao-Wei Song; Chang-Neng Chen
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-2-4
Journal Detail:
Title:  Dalton transactions (Cambridge, England : 2003)     Volume:  -     ISSN:  1477-9234     ISO Abbreviation:  Dalton Trans     Publication Date:  2013 Feb 
Date Detail:
Created Date:  2013-2-4     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101176026     Medline TA:  Dalton Trans     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, The Chinese Academy of Sciences, Fuzhou, Fujian 350002, China. ccn@fjirsm.ac.cn.
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