title: Heterometallic Cu(II)-Dy(III) Clusters of Different Nuclearities with Slow Magnetic Relaxation.
abstract: The synthesis, structures, and magnetic properties of two heterometallic Cu(II)-Dy(III) clusters are reported. The first structural motif displays a pentanuclear Cu(II)4Dy(III) core, while the second one reveals a nonanuclear Cu(II)6Dy(III)3 core. We employed o-vanillin-based Schiff base ligands combining o-vanillin with 3-amino-1-propanol, H2vap, (2-[(3-hydroxy-propylimino)-methyl]-6-methoxy-phenol), and 2-aminoethanol, H2vae, (2-[(3-hydroxy-ethylimino)-methyl]-6-methoxy-phenol). The differing nuclearities of the two clusters stem from the choice of imino alcohol arm in the Schiff bases, H2vap and H2vae. This work is aimed at broadening the diversity of Cu(II)-Dy(III) clusters and to perceive the consequence of changing the length of the alcohol arm on the nuclearity of the cluster, providing valuable insight into promising future synthetic directions. The underlying topological entity of the pentanuclear Cu4Dy cluster is reported for the first time. The investigation of magnetic behaviors of 1 and 2 below 2 K reveals slow magnetic relaxation with a significant influence coming from the variation of the alcohol arm affecting the nature of magnetic interactions.
authors.affiliation: Department of Chemistry, University of Calcutta , 92, A. P. C. Road, Kolkata 700009, India.
authors.forename: Ritwik
authors.initials: R
authors.lastname: Modak
authors.affiliation: Department of Chemistry, University of Calcutta , 92, A. P. C. Road, Kolkata 700009, India.
authors.forename: Yeasin
authors.initials: Y
authors.lastname: Sikdar
authors.affiliation: Department of Chemistry, Graduate School of Science, Tohoku University , 6-3, Aramaki-Aza-Aoba, Aoba-ku, 980-8578 Sendai, Japan.|Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology (JST) , 4-1-8 Kawaguchi, Saitama 332-0012, Japan.
authors.forename: Goulven
authors.initials: G
authors.lastname: Cosquer
authors.affiliation: Department of Chemistry, Serampore College , Serampore, Hoogly 712 201, India.
authors.forename: Sudipta
authors.initials: S
authors.lastname: Chatterjee
authors.affiliation: Department of Chemistry, Graduate School of Science, Tohoku University , 6-3, Aramaki-Aza-Aoba, Aoba-ku, 980-8578 Sendai, Japan.|Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology (JST) , 4-1-8 Kawaguchi, Saitama 332-0012, Japan.
authors.forename: Masahiro
authors.initials: M
authors.lastname: Yamashita
authors.affiliation: Department of Chemistry, University of Calcutta , 92, A. P. C. Road, Kolkata 700009, India.
authors.forename: Sanchita
authors.initials: S
authors.lastname: Goswami