000075488 001__ 75488
000075488 005__ 20200117221614.0
000075488 0247_ $$2doi$$a10.1039/c8dt00685g
000075488 0248_ $$2sideral$$a108043
000075488 037__ $$aART-2018-108043
000075488 041__ $$aeng
000075488 100__ $$aFraser, H.W.L.
000075488 245__ $$aOrder in disorder: Solution and solid-state studies of [M III 2 M II 5] wheels (MIII = Cr, Al; MII = Ni, Zn)
000075488 260__ $$c2018
000075488 5060_ $$aAccess copy available to the general public$$fUnrestricted
000075488 5203_ $$aA family of heterometallic Anderson-type ''wheels'' of general formula [MIII2MII5(hmp)12](ClO4)4 (where MIII = Cr or Al and MII = Ni or Zn giving [Cr2Ni5] (1), [Cr2Zn5] (2), [Al2Ni5] (3) and [Al2Zn5] (4); hmpH = 2-pyridinemethanol) have been synthesised solvothermally. The metallic skeleton common to all structures describes a centred hexagon with the MIII sites disordered around the outer wheel. The structural disorder has been characterised via single crystal X-ray crystallography, 1-3D 1H and 13C solution-state NMR spectroscopy of the diamagnetic analogue (4), and solid-state 27Al MAS NMR spectroscopy of compounds (3) and (4). Alongside ESI mass spectrometry, these techniques show that structure is retained in solution, and that the disorder is present in both the solution and solid-state. Solid-state dc susceptibility and magnetisation measurements on (2) and (3) reveal the Cr-Cr and Ni-Ni exchange interactions to be JCr-Cr = -1 cm-1 and JNi-Ni, r = -5 cm-1, JNi-Ni, c = 10 cm-1. Fixing these values allows us to extract JCr-Ni, r = -1.2 cm-1, JCr-Ni, c = 2.6 cm-1 for (1), the exchange between adjacent Ni and Cr ions on the ring is antiferromagnetic and between Cr ions on the ring and the central Ni ion is ferromagnetic.
000075488 536__ $$9info:eu-repo/grantAgreement/ES/MINECO-FEDER/MAT2015-68204-R
000075488 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000075488 590__ $$a4.052$$b2018
000075488 591__ $$aCHEMISTRY, INORGANIC & NUCLEAR$$b7 / 45 = 0.156$$c2018$$dQ1$$eT1
000075488 592__ $$a1.12$$b2018
000075488 593__ $$aInorganic Chemistry$$c2018$$dQ1
000075488 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000075488 700__ $$aNichol, G.S.
000075488 700__ $$aUhrín, D.
000075488 700__ $$aNielsen, U.G.
000075488 700__ $$0(orcid)0000-0002-8028-9064$$aEvangelisti, M.$$uUniversidad de Zaragoza
000075488 700__ $$aSchnack, J.
000075488 700__ $$aBrechin, E.K.
000075488 7102_ $$12003$$2395$$aUniversidad de Zaragoza$$bDpto. Física Materia Condensa.$$cÁrea Física Materia Condensada
000075488 773__ $$g47, 34 (2018), 11834-11842$$pDalton Trans.$$tDalton Transactions$$x1477-9226
000075488 8564_ $$s632898$$uhttps://zaguan.unizar.es/record/75488/files/texto_completo.pdf$$yVersión publicada
000075488 8564_ $$s112193$$uhttps://zaguan.unizar.es/record/75488/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000075488 909CO $$ooai:zaguan.unizar.es:75488$$particulos$$pdriver
000075488 951__ $$a2020-01-17-21:49:45
000075488 980__ $$aARTICLE