Linked Life Data

20449421

Source:http://linkedlifedata.com/resource/pubmed/id/20449421

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
7
pubmed:dateCreated
2010-5-7
pubmed:abstractText
Two enantiomeric Schiff base ligands R-/S-H2L in situ generated from the condensation of o-vanillin with R- or S-2-phenylglycinol were applied to assemble chiral multinuclear transition metal magnetic clusters for the first time. Four new enantiomerically pure chiral clusters, [NaMn4(3-O)(N3)1.75Br0.25(R-L)3(MeOH)2(H2O)2][NaMn4(mu3-O)(N3)2(R-L)3(MeOH)2(H2O)2]Br4 (1R), [NaMn4(mu3-O)(N3)1.75Br0.25(S-L)3(MeOH)2(H2O)2][NaMn4(mu3-O)(N3)2(S-L)3(MeOH)2(H2O)2]Br4 (1S), [Cu6(R-L)2(R-HL)2(N3)5(MeOH)]NO3.2MeOH.H2O (2R) and [Cu6(S-L)2(S-HL)2(N3)5(MeOH)]NO3.2MeOH.H2O (2S), have been synthesized and characterized by single crystal X-ray crystallography and CD spectroscopy. Three Mn(III) in the MnIIMnIII3 clusters of 1R and 1S are joined together through the 3-O bridge to form an oxo-centered Mn3O unit. Three L2- link four manganese atoms via the mu2-O,N,O-bridging manner into a MnIIMnIII3 cluster in a distorted tetrahedral geometry. Enantiomeric 2S and 2R are hexanuclear copper(II) clusters composed of a cubane-like Cu4L4 part with a dinuclear Cu2(N3)2 unit capped on one of the faces of the Cu4L4 cubane via the mu1,1-azide and phenolate bridges from the chiral ligands. Magnetic analysis reveals intracluster antiferromagnetic interaction between adjacent manganese ions in chiral oxo-centered MnIIMnIII3 magnetic clusters for 1R and 1S, and dominating antiferromagnetic over weak ferromagnetic interactions in Cu6 clusters in 2R and 2S.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
1477-9234
pubmed:author
pubmed:issnType
Electronic
pubmed:day
21
pubmed:volume
39
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1771-80
pubmed:meshHeading
pubmed:year
2010
pubmed:articleTitle
Chiral transition metal clusters from two enantiomeric schiff base ligands. Synthesis, structures, CD spectra and magnetic properties.
pubmed:affiliation
Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou, 510275, China.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't