A Mn(iii) single ion magnet with tridentate Schiff-base ligands. Issue 31 (21st July 2016)

• Record Type: Journal Article
• Authors: Realista, S.; Fitzpatrick, A. J.; Santos, G.; Ferreira, L. P.; Barroso, S.; Pereira, L. C. J.; Bandeira, N. A. G.; Neugebauer, P.; Hrubý, J.; Morgan, G. G.; van Slageren, J.; Calhorda, M. J.; Martinho, P. N.
• Is Part Of: Dalton transactions. Volume 45:Issue 31(2016)
• Page Start: 12301
• Page End: 12307
• Publication Date: 2016-07-21
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c6dt02538b
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Single ion magnet behaviour is reported for a mononuclear Mn(iii ) ion with tridentate Schiff-base ligands revealing that the size of the axial anisotropy is the highest reported to date. 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 D s ( 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.