Abstract
The reaction of the Schiff base ligand o-OH-C6H4-CH=N-C(CH2OH)3, H4L, with Ni(O2CMe)2∙4H2O and lanthanide nitrate salts in a 4:2:1 ratio lead to the formation of the trinuclear complexes [Ni2Ln(H3L)4(O2CMe)2](NO3) (Ln = Dy (1), Ho (2), and Y (3)) which crystallize in the non-centrosymmetric space group Pna21. The complex cation consists of the three metal ions in an almost linear arrangement. The {Ni2Ln} moieties are bridged through two deprotonated Ophenolato groups from two different ligands. Each terminal NiII ion is bound to two ligands through their Ophenolato, the Nimino atoms and one of the protonated Oalkoxo groups in a distorted octahedral. The central lanthanide ion is coordinated to four Ophenolato oxygen from the four ligands, and four Ocarboxylato atoms from two acetates which are bound in the bidentate chelate mode, and the coordination polyhedron is biaugmented trigonal prism, which probably results in a non-centrosymmetric arrangement of the complexes in the lattice. The magnetic properties of 1–3 were studied and showed that 1 exhibits field induced slow magnetic relaxation.
Highlights
The study of multifunctional materials, with new or combined properties, is a very active area in material science, as new materials are expected to have a big impact on new technologies that possibly could be the driving force for economic growth in the near future [1]
The field of multifunctional Single Molecule Magnets (SMMs) is growing rapidly as it is proved by the pioneering works that have resulted on the synthesis of complexes that combine the SMM behavior with conductivity [3], ferroelectricity [4], dielectricity [5], luminescence [6] and chirality [5,7]
Many examples of pure transition metal or lanthanide complexes exist, which exhibit, in addition to the SMM properties, an extra property that classify them as multifunctional materials [3,6,8]
Summary
The study of multifunctional materials, with new or combined properties, is a very active area in material science, as new materials are expected to have a big impact on new technologies that possibly could be the driving force for economic growth in the near future [1]. In this study we present the synthesis, crystallographic characterization and magnetic properties of three complexes [Ni2Ln(H3L)4(O2CMe)2](NO3) (Ln = Dy (1), Ho (2), and Y (3)) which were synthesized following the same synthetic paths as previously described [19], but all three complexes crystallize in the non-centrosymmetric Pna space group which belongs to the mm point group (following the standard notation). This point group, along with the axial and the m point groups, belong to the seven point groups which lie in the section where interesting electrical or optical properties could coexist. The crystal structure characteristics of the three complexes are discussed within this context
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
