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Slow Magnetic Relaxation at Zero Field in the Tetrahedral Complex [Co(SPh)4]2–
Abstract
The Ph(4)P(+) salt of the tetrahedral complex [Co(SPh)(4)](2-), possessing an S = (3)/(2) ground state with an axial zero-field splitting of D = -70 cm(-1), displays single-molecule magnet behavior in the absence of an applied magnetic field. At very low temperatures, ac magnetic susceptibility data show the magnetic relaxation time, τ, to be temperature-independent, while above 2.5 K thermally activated Arrhenius behavior is apparent with U(eff) = 21(1) cm(-1) and τ(0) = 1.0(3) × 10(-7) s. Under an applied field of 1 kOe, τ more closely approximates Arrhenius behavior over the entire temperature range. Upon dilution of the complex within a matrix of the isomorphous compound (Ph(4)P)(2)[Zn(SPh)(4)], ac susceptibility data reveal the molecular nature of the slow magnetic relaxation and indicate that the quantum tunneling pathway observed at low temperatures is likely mediated by intermolecular dipolar interactions.
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Cites
Dispersion and Absorption in Dielectrics I. Alternating Current Characteristics
Cole, K. S., & Cole, R. H. (1941) · The Journal of Chemical Physics · doi:10.1063/1.1750906 · Cited by 10,152
Cited by
Slow magnetization dynamics in a series of two-coordinate iron(ii) complexes
Zadrozny, J. M., Atanasov, M., Bryan, A. M., Lin, C.-Y., Rekken, B. D., Power, P. P., Neese, F., & Long, J. R. (2013) · Chem. Sci. · doi:10.1039/c2sc20801f · Cited by 579
Self-citationOrganometallic Single-Molecule Magnets
Layfield, R. A. (2014) · Organometallics · doi:10.1021/om401107f · Cited by 398
Metadata
- Authors
- Zadrozny, J. M., & Long, J. R.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2011-12-06
- Volume
- 133
- Issue
- 51
- Pages
- 20732-20734
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2330164190
- Cited by
- 477
- References
- 1
- FWCI
- 13.38
- Type
- journal article
- Language
- en
- Open access
- closed
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- Zadrozny, J. M., & Long, J. R. (2011). Slow Magnetic Relaxation at Zero Field in the Tetrahedral Complex [Co(SPh)4]2–. Journal of the American Chemical Society. https://doi.org/10.1021/ja2100142
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