The single-crystal X-ray structure of the single-molecule magnet [Mn 12O12(O2CC6H4-2-CH 3)16(H2O)4]·CH 2Cl2·2H2O (complex 1) is reported. Complex 1 is a new example of a "Jahn-Teller isomer", since it has two Mn(III) ions with abnormally oriented Jahn-Teller elongation axes. Complex 1 has a lower activation energy (Ueff = 29 K) for magnetization reversal relative to other reported [Mn12O12] type molecules (e.g., Ueff = 70 K for Mn12Ac). Single-crystal low temperature magnetization measurements are reported that confirm that complex 1 is a single-molecule magnet. High-field electron paramagnetic resonance measurements were performed on a single crystal to give the spin Hamiltonian parameters.
- Quantum tunneling of magnetization
- Single-molecule magnet
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Inorganic Chemistry
- Materials Chemistry