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Issue 31, 2016
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A Mn(III) single ion magnet with tridentate Schiff-base ligands

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Abstract

Single ion magnet behaviour is reported for a mononuclear Mn(III) ion with tridentate Schiff-base ligands which exhibits a tetragonal Jahn–Teller elongation along the Namine–Mn–Namine axis and crystallises with two crystallographically distinct Mn(III) cations (unit A and unit B). While magnetic measurements show a large and negative axial zero-field splitting (D = −4.73 cm−1), HF-EPR reveal two distinct large axial Ds (D = −4.60 cm−1 for unit A and D = −4.18 cm−1 for unit B), thus resulting in the largest D known to date for a Mn(III) single ion magnet. AC magnetic measurements at 2000 Oe allowed determination of the energy barrier for spin reversal (10.19 K) and spin reversal relaxation time (1.476 × 10−6 s) for the Mn(III) ion. Computational studies were used to characterise the electronic structure and substantiate the zero field splitting in the Mn(III) complex.

Graphical abstract: A Mn(iii) single ion magnet with tridentate Schiff-base ligands

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Publication details

The article was received on 24 Jun 2016, accepted on 13 Jul 2016 and first published on 13 Jul 2016


Article type: Communication
DOI: 10.1039/C6DT02538B
Citation: Dalton Trans., 2016,45, 12301-12307
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    A Mn(III) single ion magnet with tridentate Schiff-base ligands

    S. Realista, A. J. Fitzpatrick, G. Santos, L. P. Ferreira, S. Barroso, L. C. J. Pereira, N. A. G. Bandeira, P. Neugebauer, J. Hrubý, G. G. Morgan, J. van Slageren, M. J. Calhorda and P. N. Martinho, Dalton Trans., 2016, 45, 12301
    DOI: 10.1039/C6DT02538B

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