Back to Search
Start Over
Can Non-Kramers TmIII Mononuclear Molecules be Single-Molecule Magnets (SMMs)?
- Source :
-
Chemistry - A European Journal . Mar2016, Vol. 22 Issue 14, p4704-4708. 5p. - Publication Year :
- 2016
-
Abstract
- In recent years, plentiful lanthanide-based (TbIII, DyIII, and ErIII) single-molecule magnets (SMMs) were studied, while examples of other lanthanides, for example, TmIII are still unknown. Herein, for the first time, we show that by rationally manipulating the coordination sphere, two thulium compounds, 1[(Tp)Tm(COT)] and 2[(Tp*)Tm(COT)] (Tp=hydrotris(1-pyrazolyl)borate; COT=cyclooctatetraenide; Tp*=hydrotris(3,5-dimethyl-1-pyrazolyl)borate), can adopt the structure of non-Kramers SMMs and exhibit their behaviors. Dynamic magnetic studies indicated that both compounds showed slow magnetic relaxation under dc field and a relatively high effective energy barrier (111 K for 1, 46 K for 2). Magnetic diluted 1 a[(Tp)Tm0.05Y0.95(COT)] and 2 a[(Tp*)Tm0.05Y0.95(COT)] even exhibited magnetic relaxation under zero dc field. Relativistic ab initio calculations combined with single-crystal angular-resolved magnetometry measurements revealed the strong easy axis anisotropy and nearly degenerated ground doublet states. The comparison of 1 and 2 highlights the importance of local symmetry for obtaining Tm SMMs. [ABSTRACT FROM AUTHOR]
- Subjects :
- *RARE earth metals
*SINGLE molecules
*MAGNETS
*MAGNETIC materials
*THULIUM
Subjects
Details
- Language :
- English
- ISSN :
- 09476539
- Volume :
- 22
- Issue :
- 14
- Database :
- Academic Search Index
- Journal :
- Chemistry - A European Journal
- Publication Type :
- Academic Journal
- Accession number :
- 113881040
- Full Text :
- https://doi.org/10.1002/chem.201600023