Pentanuclear spirocyclic Ni 4 Ln derivatives: field induced slow magnetic relaxation in the dysprosium and erbium analogues

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dc.contributor.author Shukla, Pooja
dc.contributor.author Roy, Soumalya
dc.contributor.author Dolui, Dependu
dc.contributor.author Mancisidor, Walter Canon
dc.contributor.author Das, Sourav
dc.date.accessioned 2020-03-07T14:28:14Z
dc.date.available 2020-03-07T14:28:14Z
dc.date.issued 2020-02
dc.identifier.citation Shukla, Pooja; Roy, Soumalya; Dolui, Dependu; Mancisidor, Walter Canon and Das, Sourav, “Pentanuclear spirocyclic Ni 4 Ln derivatives: field induced slow magnetic relaxation in the dysprosium and erbium analogues”, European Journal of Inorganic Chemistry, DOI: 10.1002/ejic.201901350, Feb. 2020. en_US
dc.identifier.issn 1434-1948
dc.identifier.issn 1099-0682
dc.identifier.uri https://dx.doi.org/10.1002/ejic.201901350
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/5206
dc.description.abstract Five pentanuclear heterometallic isostructural complexes, [Ni 4 Ln(L) 2 (LH) 2 (CH 3 CN) 3 Cl]� xH 2 O�yCH 3 OH (Ln= Y III ( 1 ), Gd III ( 2 ), Tb III ( 3 ), Dy III ( 4 ) and Er III ( 5 )) [for 1 and 2 , x = 2, y = 1; for 3 , x = 6, y = 2; for 4 , x = 5, y = 1; for 5 , x = 2, y = 2)] were prepared by the reaction of (E)?2(hydroxymethyl)?6?(((2?hydroxyphenyl) imino) methyl)?4?methylphenol (LH 3 ) with LnCl 3 �6H 2 O and Ni(OAc) 2 �4H 2 O in the presence of Tetrabutylammonium hydroxide (TBA?OH) base. The structural characterization reveals compounds 1 ? 5 contains spirocyclic pentanuclear core [Ni 4 Ln(� 3 ?O) 4 (� 2 ?O) 4 ] 3+ where two triangular motifs [Ni 2 Ln(� 3 ?O) 2 (� 2 ?O) 2 ] 3+ that are fused together through a common vertex of Ln(III) ion. The central Ln(III) ion forms an eight?coordinated distorted triangular dodecahedron geometry while the Ni(II) ions forms a distorted octahedron geometry. Comprehensive dc magnetic studies reveal antiferromagnetic exchange interaction present between the Ni(II) centrs. The ac susceptibility measurement revels that dysprosium and erbium analogue shows field induced slow magnetic relaxation with an anisotropic barrier (U eff ) of 25.12 cm ?1 and 22.13 cm ?1 respectively.
dc.description.statementofresponsibility by Pooja Shukla, Soumalya Roy, Dependu Dolui, Walter Canon Mancisidor and Sourav Das
dc.language.iso en_US en_US
dc.publisher Wiley en_US
dc.title Pentanuclear spirocyclic Ni 4 Ln derivatives: field induced slow magnetic relaxation in the dysprosium and erbium analogues en_US
dc.type Article en_US
dc.relation.journal European Journal of Inorganic Chemistry


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