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- Title
Anion-directed assembly of lanthanide coordination polymers with SMMs properties based on a dihydrazone ligand.
- Authors
Zhang, Lina; Duan, Peigao; Liu, Yang; Sun, Jingxian; Zhao, Dan; Du, Chenxia
- Abstract
Four new Ln(III)-based coordination polymers (CPs), [Eu(HL)Cl2(DMF)2]·(H2L) (1), [Dy(HL)Cl2(DMF)2]·(H2L)(2), [Er(HL)Cl2(DMF)(CH3OH)]·(DMF) (3) and [Yb(HL)Cl2(DMF)(H2O)]·(DMF) (4) (H2L=2,6-bis[(3-methoxysalicylidene)hydrazinocarbonyl]pyridine) have been synthesized through the reaction of Ln(III) chloride and H2L by using the vapour diffusion method. Interestingly, Cl- as a template agent plays a vital role in the formation of the target complexes. Single-crystal X-ray diffraction studies indicate that 1 and 2 are isostructural and crystallize in triclinic space group P1, while complexes 3 and 4 are isostructural and crystallize in monoclinic space group C2/c. Variable temperature magnetization measurement (χMT-T) demonstrates possible antiferromagnetic interactions in complex 2. Alternating-current (ac) susceptibility measurement furthermore indicated frequency dependence for both the in-phase (χ') and out-of-phase (χ") components in 2, suggesting that there is a slow relaxation behavior of the magnetization, which is typical of single-molecule magnets (SMMs). This is the first time that Ln(III) CPs based on such a dihydrazone ligand has been reported so far.
- Subjects
RARE earth metals; COORDINATION polymers; SINGLE molecule magnets; HYDRAZONES; MONOCLINIC crystal system
- Publication
Zeitschrift für Kristallographie. Crystalline Materials, 2018, Vol 233, Issue 1, p51
- ISSN
2194-4946
- Publication type
Article
- DOI
10.1515/zkri-2017-2076