High-frequency EPR characterization of a triangular Mn3 single-molecule magnet

We present the results of a multi-high-frequency single-crystal EPR study of a recently discovered triangular trinuclear Mn complex, [Mn3O(O2CMe)3(mpko)3](ClO4) · 3CH2Cl2. The obtained data set confirm the findings of earlier magnetic measurements, which suggested that this complex is a single-molecule magnet with a spin ground state of S = 6. The zero-field splitting parameters obtained from the present EPR study are: D = −0.3 cm−1, B40=-3×10-5cm-1 and g = 2.00. We also find a significant transverse anisotropy which can be parameterized by a rhombic distortion with an E value of at least 0.015 cm−1.

The results of a multi-high-frequency single-crystal EPR study of a recently discovered triangular trinuclear Mn complex, [Mn3O(O2CMe)3(mpko)3](ClO4) · 3CH2Cl2, are presented. The obtained data confirm the findings of earlier magnetic measurements, which suggested that this complex is a single-molecule magnet with a spin ground state of S = 6. The zero-field splitting parameters obtained from the present EPR study are: D = −0.3 cm−1, B40=-3×10-5cm-1 and g = 2.00.Figure optionsDownload as PowerPoint slide