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dc.contributor.authorMcDonald, C
dc.contributor.authorSanz, S
dc.contributor.authorBrechin, EK
dc.contributor.authorSingh, MK
dc.contributor.authorRajaraman, G
dc.contributor.authorGaynor, D
dc.contributor.authorJones, LF
dc.date.accessioned2020-01-23T12:13:34Z
dc.date.available2020-01-23T12:13:34Z
dc.date.issued2014-08-13
dc.identifier.citationMcDonald, C., Sanz, S., Brechin, E. K., Singh, M. K., Rajaraman, G., Gaynor, D. and Jones, L. F. (2014) High nuclearity Ni(II) cages from hydroxamate ligands, RSC Advances, 4(72), pp. 38182-38191. https://doi.org/10.1039/c4ra06064den
dc.identifier.issn2046-2069en
dc.identifier.doi10.1039/c4ra06064den
dc.identifier.urihttp://hdl.handle.net/2436/623016
dc.description.abstractThe synthesis, structural and magnetic characterisation of a family of Ni(ii) cages built from hydroxamate ligands is presented. Two pentanuclear 12-MCNi(ii)-4 metallacrowns [Ni5(L1) 4(MeOH)4](ClO4)2·2MeOH (1) and [Ni5(L1)4(py)5](ClO 4)2·H2O (2) (where L1H 2 = 2-(dimethylamino)phenylhydroxamic acid) share analogous, near-planar {Ni5(L1)4}2+ cores, but differ in the number and nature of the ligands located at the axial Ni(ii) sites; the addition of pyridine converting square planar Ni(ii) ions to square-based pyramidal and octahedral Ni(ii) ions, introducing extra paramagnetic metal centres which 'switch on' additional magnetic superexchange pathways. Subtle variations in the reaction scheme used to produce complexes 1 and 2 result in both a change of topology and an increase in nuclearity, through isolation of the hepta- and nonametallic complexes [Ni7(L 1H)8(L1)2(H2O) 6](SO4)·15H2O (3), [Ni 9(μ-H2O)2(L2)6(L 2H)4(H2O)2](SO4) ·29H2O (4) and [Ni9(μ-H2O) 2(L2)6(L2H)4(H 2O)2](ClO4)2·2MeOH· 18H2O (5) (where L2H2 = 2-(amino) phenylhydroxamic acid). Complementary dc magnetic susceptibility studies and DFT analysis indicate dominant antiferromagnetic exchange interactions in 1, 2, 4 and 5, but competing ferro- and antiferromagnetic exchange in 3. © the Partner Organisations 2014.en
dc.description.sponsorshipEKB would like to thank the EPSRC for funding (SS). GR acknowledges financial support from the Government of India through the Department of Science and Technology (SR/S1/IC-41/2010; SR/NM/NS-1119/2011) and generous computational resources from the Indian Institute of Technology-Bombay. MKS thanks the University Grants Commission for a Junior Research Fellowship.en
dc.formatapplication/pdfen
dc.languageen
dc.language.isoenen
dc.publisherRoyal Society of Chemistry (RSC)en
dc.relation.urlhttps://pubs.rsc.org/en/content/articlelanding/2014/RA/C4RA06064D#!divAbstracten
dc.titleHigh nuclearity Ni(ii) cages from hydroxamate ligandsen
dc.typeJournal articleen
dc.identifier.eissn2046-2069
dc.identifier.journalRSC Advancesen
dc.date.updated2020-01-22T08:36:25Z
dc.date.accepted2014-08-13
rioxxterms.funderUniversity of Maiduguri and the Petroleum Technology Development Fund/ EPSRCen
rioxxterms.identifier.projectSR/S1/IC-41/2010, SR/NM/NS-1119/2011en
rioxxterms.versionAMen
rioxxterms.licenseref.urihttps://creativecommons.org/licenses/by-nc/4.0/en
rioxxterms.licenseref.startdate2020-01-23en
dc.source.volume4
dc.source.issue72
dc.source.beginpage38182
dc.source.endpage38191
dc.description.versionPublished version
refterms.dateFCD2020-01-23T12:10:03Z
refterms.versionFCDAM
refterms.dateFOA2020-01-23T12:13:35Z


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