title: Slow magnetic relaxation of light lanthanide-based linear LnZn2 trinuclear complexes.
abstract: Four isostructural LnZn2 trinuclear complexes, [Ln(NO3){Zn(L)(SCN)}2] (H2L is a Schiff base ligand derived from o-vanillin and ethylenediamine), were synthesized, which include light lanthanide ions as spin carriers (Ln = Ce 1, Pr 2, Nd 3, and Sm 4). These complexes involve a linear Zn(ii)-Ln(iii)-Zn(ii) array, which leads to an axially stressed ligand field and can also cause single-moleluce magnet (SMM) behavior in oblate-type electronic distributions of ground sublevels found in Ce(iii), Pr(iii), and Nd(iii). Slow magnetic relaxation behavior was observed in 1 and 3 under an applied bias dc field of 1000 Oe, whereas such a slow relaxation was not observed in 2 and 4. The appearance of field-induced SMM behavior in 1 and 3 was correlated with the even-numbered Jz sublevels of Ce(iii) and Nd(iii) ions known as the Kramers system.
authors.affiliation: Faculty of Science, Nara Women's University, Nara, Nara 630-8506, Japan. kajiwara@cc.nara-wu.ac.jp.
authors.forename: Chika
authors.initials: C
authors.lastname: Takehara
authors.forename: Poh Ling
authors.initials: PL
authors.lastname: Then
authors.forename: Yumiko
authors.initials: Y
authors.lastname: Kataoka
authors.forename: Motohiro
authors.initials: M
authors.lastname: Nakano
authors.forename: Tomoo
authors.initials: T
authors.lastname: Yamamura
authors.forename: Takashi
authors.initials: T
authors.lastname: Kajiwara
mesh_terms: D001547:Benzaldehydes / Q000737:chemistry; D056831:Coordination Complexes / Q000737:chemistry*; D018360:Crystallography, X-Ray; D005029:Ethylenediamines / Q000737:chemistry; D028581:Lanthanoid Series Elements / Q000737:chemistry*; D059346:Magnets / Q000737:chemistry*; D008958:Models, Molecular; D012545:Schiff Bases / Q000737:chemistry; D015032:Zinc / Q000737:chemistry*
chemical_list: D001547:Benzaldehydes; D056831:Coordination Complexes; D005029:Ethylenediamines; D028581:Lanthanoid Series Elements; D012545:Schiff Bases; C060843:2-vanillin; C031234:ethylenediamine; D015032:Zinc