000135949 001__ 135949
000135949 005__ 20240704095849.0
000135949 0247_ $$2doi$$a10.3390/molecules26185626
000135949 0248_ $$2sideral$$a125798
000135949 037__ $$aART-2021-125798
000135949 041__ $$aeng
000135949 100__ $$0(orcid)0000-0002-5999-341X$$aArauzo, Ana$$uUniversidad de Zaragoza
000135949 245__ $$aSlow magnetic relaxation in {[CoCxAPy)] 2.15 H2O}n mof built from ladder-structured 2D layers with dimeric SMM rungs
000135949 260__ $$c2021
000135949 5060_ $$aAccess copy available to the general public$$fUnrestricted
000135949 5203_ $$aWe present the magnetic properties of the metal-organic framework {[CoCxAPy]·2.15 H2O}n (Cx = bis(carboxypropyl)tetramethyldisiloxane; APy = 4, 4`-azopyridine) (1) that builds up from the stacking of 2D coordination polymers. The 2D-coordination polymer in the bc plane is formed by the adjacent bonding of [CoCxAPy] 1D two-leg ladders with Co dimer rungs, running parallel to the c-axis. The crystal packing of 2D layers shows the presence of infinite channels running along the c crystallographic axis, which accommodate the disordered solvate molecules. The Co(II) is six-coordinated in a distorted octahedral geometry, where the equatorial plane is occupied by four carboxylate oxygen atoms. Two nitrogen atoms from APy ligands are coordinated in apical positions. The single-ion magnetic anisotropy has been determined by low temperature EPR and magnetization measurements on an isostructural compound {[Zn0.8Co0.2CxAPy]·1.5 CH3OH}n (2). The results show that the Co(II) ion has orthorhombic anisotropy with the hard-axis direction in the C2V main axis, lying the easy axis in the distorted octahedron equatorial plane, as predicted by the ab initio calculations of the g-tensor. Magnetic and heat capacity properties at very low temperatures are rationalized within a S* = 1/2 magnetic dimer model with anisotropic antiferromagnetic interaction. The magnetic dimer exhibits slow relaxation of the magnetization (SMM) below 6 K in applied field, with a tlf ˜ 2 s direct process at low frequencies, and an Orbach process at higher frequencies with U/kB = 6.7 ± 0.5 K. This compound represents a singular SMM MOF built-up of Co-dimers with an anisotropic exchange interaction.
000135949 536__ $$9info:eu-repo/grantAgreement/ES/DGA/E12-20R$$9info:eu-repo/grantAgreement/ES/MICINN/PGC2018-099024-B-I00$$9info:eu-repo/grantAgreement/ES/MINECO/MAT2017-83468-R
000135949 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000135949 590__ $$a4.927$$b2021
000135949 591__ $$aCHEMISTRY, MULTIDISCIPLINARY$$b65 / 179 = 0.363$$c2021$$dQ2$$eT2
000135949 591__ $$aBIOCHEMISTRY & MOLECULAR BIOLOGY$$b114 / 297 = 0.384$$c2021$$dQ2$$eT2
000135949 592__ $$a0.705$$b2021
000135949 593__ $$aAnalytical Chemistry$$c2021$$dQ1
000135949 593__ $$aDrug Discovery$$c2021$$dQ1
000135949 593__ $$aPharmaceutical Science$$c2021$$dQ1
000135949 593__ $$aMolecular Medicine$$c2021$$dQ1
000135949 593__ $$aOrganic Chemistry$$c2021$$dQ1
000135949 593__ $$aMedicine (miscellaneous)$$c2021$$dQ1
000135949 594__ $$a5.9$$b2021
000135949 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000135949 700__ $$aBartolomé, Elena
000135949 700__ $$0(orcid)0000-0002-9208-0807$$aLuzón, Javier
000135949 700__ $$0(orcid)0000-0003-3449-4929$$aAlonso, Pablo J.
000135949 700__ $$aVlad, Angelica
000135949 700__ $$aCazacu, Maria
000135949 700__ $$aZaltariov, Mirela F.
000135949 700__ $$aShova, Sergiu
000135949 700__ $$0(orcid)0000-0002-6517-1236$$aBartolomé, Juan$$uUniversidad de Zaragoza
000135949 700__ $$aTurta, Constantin
000135949 7102_ $$10$$2X$$aUniversidad de Zaragoza$$bServ.Gral. Apoyo Investigación$$cServicios. Div.Caract.Físi.Quí
000135949 7102_ $$12003$$2395$$aUniversidad de Zaragoza$$bDpto. Física Materia Condensa.$$cÁrea Física Materia Condensada
000135949 773__ $$g26, 18 (2021), 5626 [26 pp.]$$pMolecules (Basel, Online)$$tMolecules$$x1420-3049
000135949 8564_ $$s2830892$$uhttps://zaguan.unizar.es/record/135949/files/texto_completo.pdf$$yVersión publicada
000135949 8564_ $$s2756760$$uhttps://zaguan.unizar.es/record/135949/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000135949 909CO $$ooai:zaguan.unizar.es:135949$$particulos$$pdriver
000135949 951__ $$a2024-07-04-07:58:55
000135949 980__ $$aARTICLE