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Di- and octa-nuclear dysprosium clusters derived from pyridyl-triazole based ligand: {Dy2} showing single molecule magnetic behaviour.
- Source :
- Dalton Transactions: An International Journal of Inorganic Chemistry; 3/7/2017, Vol. 46 Issue 9, p2981-2987, 7p
- Publication Year :
- 2017
-
Abstract
- Two dysprosium aggregates, formulated as [Dy<subscript>2</subscript>(μ-OH)<subscript>2</subscript>(H<subscript>2</subscript>bpte)<subscript>2</subscript>Cl<subscript>2</subscript>(MeOH)<subscript>2</subscript>]Cl<subscript>2</subscript> (1), and [Dy<subscript>8</subscript>(μ-OH)<subscript>8</subscript>(bpte)<subscript>8</subscript>]·24H<subscript>2</subscript>O (2) (H<subscript>2</subscript>bpte = 1,2-bis(3-(pyridin-2-yl)-1H-1,2,4-triazol-5-yl)ethane), were obtained using solvothermal reactions. Upon changing the metal salt and synthetic reaction conditions, an eight-member {Dy<subscript>8</subscript>} (2) ring was isolated. Complex 1 is centrosymmetric in which two {Dy<subscript>2</subscript>} clusters are connecting to each other through the hydrogen bonding. Complex 2 forms an eight-member Dy<superscript>III</superscript> ring with an inner diameter of 4.5 Å and is the first reported {Dy<subscript>8</subscript>(μ-OH)<subscript>8</subscript>} core in lanthanide-hydroxo clusters. The H<subscript>2</subscript>bpte ligand displays trans,trans- and cis,cis-coordination modes in 1 and 2, respectively. Alternating current (ac) magnetic measurements of both complexes were carried out. In 1, the out-of-phase susceptibilities (χ′′<subscript>M</subscript>) below 9 K confirm the slow relaxation of magnetization, which is a typical characteristic of single-molecule magnets (SMMs). [ABSTRACT FROM AUTHOR]
- Subjects :
- PYRIDYL compounds
TRIAZOLES
MAGNETIC properties
Subjects
Details
- Language :
- English
- ISSN :
- 14779226
- Volume :
- 46
- Issue :
- 9
- Database :
- Complementary Index
- Journal :
- Dalton Transactions: An International Journal of Inorganic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 121511865
- Full Text :
- https://doi.org/10.1039/c7dt00047b