Linked Life Data

17569523

Source:http://linkedlifedata.com/resource/pubmed/id/17569523

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
14
pubmed:dateCreated
2007-7-2
pubmed:abstractText
Molecular materials of transition metal ions and organic acceptors of the general formula M(TCNX)2 M=V, Mn, Fe, Co, Ni; X=Q=7,7,8,8-tetracyano-p-quinodimethane, E=tetracyanoethylene, are known to exhibit magnetic ordering resulting from magnetic interactions between the 3d metal orbitals of the paramagnetic metal ion and pi* orbitals of the organic radical spin centers. The reaction of THF solutions of UI3(THF)4 with neutral TCNQ and TCNE instantaneously produce insoluble coordination polymers that can be assigned a formula of [U(TCNX)2I2(THF)2]n on the basis of elemental analysis. Similar reactions between (K-18-crown-6)(TCNX) reagents and UI3(THF)4 produce materials with slightly different phase compositions that are structurally distinct from the neutral TCNQ and TCNE reaction products, as judged by infrared spectroscopy. In all cases the magnetic response of these materials is consistent with the presence of the U(IV) rather than U(III) ion. Voltammetric data obtained for all the synthetic precursors are consistent with the U(IV)/TCNX radical anion formulation. None of the materials undergo magnetic ordering, presumably due to the singlet magnetic ground state that results from the U(IV) ion in a low-symmetry ligand field.
pubmed:language
eng
pubmed:journal
pubmed:status
PubMed-not-MEDLINE
pubmed:month
Jul
pubmed:issn
0020-1669
pubmed:author
pubmed:issnType
Print
pubmed:day
9
pubmed:volume
46
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
5528-36
pubmed:year
2007
pubmed:articleTitle
Toward actinide molecular magnetic materials: coordination polymers of U(IV) and the organic acceptors TCNQ and TCNE.
pubmed:affiliation
Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA. schelter@lanl.gov
pubmed:publicationType
Journal Article