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A Trigonal Prismatic Cobalt(II) Complex as a Single Molecule Magnet with a Reduced Contribution from Quantum Tunneling |
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| Authors: | Dr Alexander A Pavlov Dmitry Y Aleshin Svetlana A Savkina Alexander S Belov Dr Nikolay N Efimov Dr Joscha Nehrkorn Dr Mykhaylo Ozerov Prof?Dr Yan Z Voloshin Prof?Dr Yulia V Nelyubina Prof?Dr Valentin V Novikov |
| Institution: | 1. A.?N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova str. 28, 119991, Moscow, Russia;2. A.?N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova str. 28, 119991, Moscow, Russia
D. Mendeleyev University of Chemical Technology of Russia, Miusskaya pl. 9, 125047 Moscow, Russia;3. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii prosp., 31, 117901 Moscow, Russia;4. National High Magnetic Field Laboratory & Florida State University 1800 E. Paul Dirac Drive Tallahassee, FL 32310-3706 USA Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34–36, 45470, Mülheim an der Ruhr, Germany;5. National High Magnetic Field Laboratory & Florida State University 1800 E. Paul Dirac Drive Tallahassee, FL 32310-3706 USA;6. A.?N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova str. 28, 119991, Moscow, Russia Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii prosp., 31, 117901 Moscow, Russia |
| Abstract: | Herein, we report a new trigonal prismatic cobalt(II) complex that behaves as a single molecule magnet. The obtained zero-field splitting, which is also directly accessed by THz-EPR spectroscopy (?102.5 cm?1), results in a large magnetization reversal barrier U of 205 cm?1. Its effective value, however, is much lower (101 cm?1), even though there is practically no contribution from quantum tunneling to magnetization relaxation. |
| Keywords: | cage compounds high-spin cobalt(II) complexes paramagnetic NMR spectroscopy single molecule magnets THz-EPR spectroscopy |