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dc.contributor.authorAndrews, P.
dc.contributor.authorDeacon, G.
dc.contributor.authorFrank, R.
dc.contributor.authorFraser, B.
dc.contributor.authorJunk, P.
dc.contributor.authorMaclellan, J.
dc.contributor.authorMassi, Massimiliano
dc.contributor.authorMoubaraki, B.
dc.contributor.authorMurray, K.
dc.contributor.authorSilberstein, Morry
dc.date.accessioned2017-01-30T15:02:36Z
dc.date.available2017-01-30T15:02:36Z
dc.date.created2014-11-19T01:13:26Z
dc.date.issued2009
dc.date.submitted2014-11-19
dc.identifier.citationAndrews, P. and Deacon, G. and Frank, R. and Fraser, B. and Junk, P. and Maclellan, J. and Massi, M. et al. 2009. Formation of Ho-III Trinuclear Clusters and Gd-III Monodimensional Polymers Induced by ortho and para Regioisomers of Pyridyl-Functionalised beta-Diketones: Synthesis, Structure, and Magnetic Properties. European Journal of Inorganic Chemistry. 6 (6): pp. 744-751.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/42842
dc.description.abstract

Reaction of GdCl3(H2O)(6) and 1,3-bis(pyridin-4-yl)propane-1,3-dione in methanol with an excess of triethylamine produced a monodimensional polymeric chain [Gd(p-dppd)(3)-(H2O)](infinity), whereas treatment of HoCl3(H2O)(6) with 1,3-bis(pyridin-2-yl)propane-1,3-dione yielded a trinuclear cluster [Ho-3(o-dppd)(3)(mu(3)-OH)(2)(H2O)(4)Cl-2]Cl-2. The compounds were characterised by elemental analysis, IR spectroscopy and magnetism, and their structures were investigated by X-ray crystallography. The 8.20-mu(B) magnetic-moment value of the polymeric [Gd(p-dppd)(3)(H2O)](infinity), between 300 and 20 K, and the magnetisation isotherms (2-20 K; fields 0-5 T), are in agreement with essentially uncoupled single-ion Gd3+ f(7) centres, a small decrease in mu(eff) below 20 K being indicative of zero-field splitting. A temperature-dependent dc-susceptibility and magnetisation investigation of the trinuclear (tri-angular) [Ho-3(o-dppd)(3)(mu(3)-OH)(2)(H2O)(4)Cl-2]Cl-2 revealed that spin-orbit and ligand-field effects on the Ho3+ centres, leading to thermal depopulation of Zeeman levels and consequent decreases in mu(eff) values with decreasing temperature, are occurring rather than weak intra-cluster antiferromagnetic coupling. Frequency- and temperature-dependent ac-susceptibility studies on this homometallic Ho3+ cluster did not show clear evidence for slow magnetisation reversal, characteristic of single-molecule magnetism (SMM), and this contrasts with such behaviour recently reported, elsewhere, for a Dy3+ triangle having the same core structure but with different chelating {O,O} ligands.

dc.publisherWiley-VCH Verlag GmbH & Co
dc.subjectLINKERS
dc.subjectLIGANDS
dc.subjectLANTHANIDE CLUSTERS
dc.subjectN
dc.subjectCOORDINATION POLYMERS
dc.subjectCUBANE CLUSTERS
dc.subjectCoordination polymers
dc.subjectO ligands
dc.subjectDYSPROSIUM TRIANGLES
dc.subjectCluster compounds
dc.subjectSURFACE
dc.subjectKetones
dc.subjectCHEMISTRY
dc.subjectbeta-Diketonate ligands
dc.subjectMolecular magnets
dc.subjectChelates
dc.subjectTETRANUCLEAR
dc.subjectCOMPLEXES
dc.titleFormation of Ho-III Trinuclear Clusters and Gd-III Monodimensional Polymers Induced by ortho and para Regioisomers of Pyridyl-Functionalised beta-Diketones: Synthesis, Structure, and Magnetic Properties
dc.typeJournal Article
dcterms.dateSubmitted2014-11-19
dcterms.source.volume6
dcterms.source.number6
dcterms.source.startPage744
dcterms.source.endPage751
dcterms.source.issn14341948
dcterms.source.titleEuropean Journal of Inorganic Chemistry
curtin.digitool.pid204010
curtin.pubStatusPublished
curtin.identifier.scriptidPUB-SE-DAC-TMC-52756
curtin.accessStatusFulltext not available


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