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Multiple-decker phthalocyaninato dinuclear lanthanoid(III) single-molecule magnets with dual-magnetic relaxation processes.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Katoh, Keiichi Horii, Yoji Yasuda, Nobuhiro Wernsdorfer, Wolfgang Toriumi, Koshiro Breedlove, Brian K. Yamashita, Masahiro |
| Copyright Year | 2012 |
| Abstract | The SMM behaviour of dinuclear Ln(III)-Pc multiple-decker complexes (Ln = Tb(3+) and Dy(3+)) with energy barriers and slow-relaxation behaviour were explained by using X-ray crystallography and static and dynamic susceptibility measurements. In particular, interactions among the 4f electrons of several dinuclear Ln(III)-Pc type SMMs have never been discussed on the basis of the crystal structure. For dinuclear Tb(III)-Pc complexes, a dual magnetic relaxation process was observed. The relaxation processes are due to the anisotropic centres. Our results clearly show that the two Tb(3+) ion sites are equivalent and are consistent with the crystal structure. On the other hand, the mononuclear Tb(III)-Pc complex exhibited only a single magnetic relaxation process. This is clear evidence that the magnetic relaxation mechanism depends heavily on the dipole-dipole (f-f) interactions between the Tb(3+) ions in the dinuclear systems. Furthermore, the SMM behaviour of dinuclear Dy(III)-Pc type SMMs with smaller energy barriers compared with that of Tb(III)-Pc and slow-relaxation behaviour was explained. Dinuclear Dy(III)-Pc SMMs exhibited single-component magnetic relaxation behaviour. The results indicate that the magnetic relaxation properties of dinuclear Ln(III)-Pc multiple-decker complexes are affected by the local molecular symmetry and are extremely sensitive to tiny distortions in the coordination geometry. In other words, the spatial arrangement of the Ln(3+) ions (f-f interactions) in the crystal is important. Our work shows that the SMM properties can be fine-tuned by introducing weak intermolecular magnetic interactions in a controlled SMM spatial arrangement. |
| File Format | PDF HTM / HTML |
| DOI | 10.1039/c2dt31400b |
| PubMed reference number | 22906991 |
| Journal | Medline |
| Volume Number | 41 |
| Issue Number | 44 |
| Alternate Webpage(s) | http://www.rsc.org/suppdata/dt/c2/c2dt31400b/c2dt31400b.pdf |
| Alternate Webpage(s) | https://doi.org/10.1039/c2dt31400b |
| Journal | Dalton transactions |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
