A Trigonal Prismatic Cobalt(II) Complex as a Single Molecule Magnet with a Reduced Contribution from Quantum Tunneling

Alexander A Pavlov; Dmitry Y Aleshin; Svetlana A Savkina; Alexander S Belov; Nikolay N Efimov; Joscha Nehrkorn; Mykhaylo Ozerov; Yan Z Voloshin; Yulia V Nelyubina; Valentin V Novikov

doi:10.1002/cphc.201900219

A Trigonal Prismatic Cobalt(II) Complex as a Single Molecule Magnet with a Reduced Contribution from Quantum Tunneling

Chemphyschem. 2019 Apr 16;20(8):1001-1005. doi: 10.1002/cphc.201900219. Epub 2019 Apr 5.

Authors

Alexander A Pavlov¹, Dmitry Y Aleshin^{1

2}, Svetlana A Savkina¹, Alexander S Belov¹, Nikolay N Efimov³, Joscha Nehrkorn^{4

5}, Mykhaylo Ozerov⁴, Yan Z Voloshin^{1

3}, Yulia V Nelyubina^{1

3}, Valentin V Novikov¹

Affiliations

¹ A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova str. 28, 119991, Moscow, Russia.
² 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.
⁵ Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34-36, 45470, Mülheim an der Ruhr, Germany.

PMID: 30897255
DOI: 10.1002/cphc.201900219

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: THz-EPR spectroscopy; cage compounds; high-spin cobalt(II) complexes; paramagnetic NMR spectroscopy; single molecule magnets.

Publication types

Research Support, U.S. Gov't, Non-P.H.S.
Research Support, Non-U.S. Gov't

Abstract

Publication types

Grants and funding