The heterobimetallic metallacrown (MC), (TMA)2{Mn(OAc)2[12-MCMn(III)Cu(II)N(shi)-4](CH3OH)}·2.90CH3OH, 1, where TMA+ is tetramethylammonium, -OAc is acetate, and shi3- is salicylhydroximate, consists of a MnII ion captured in the central cavity and alternating unambiguous and ordered manganese(III) and copper(II) sites about the MC ring, a first for the archetypal MC structure design. DC-magnetometry characterization and subsequent simulation with the Spin Hamiltonian H = -J1(s1 + s3)·s5 - J2(s2 + s4)·s5 - J3ςi=14si·si+1 + d(sz,12 + sz,32) + μBςj=15gjsj·B indicates an S = 5/2 ground state and a sizable axial zero-field splitting on MnIII. AC-susceptibility measurements reveal that 1 displays slow magnetization relaxation akin to single-molecule magnet (SMM) behavior.

Slow Magnetic Relaxation of a 12-Metallacrown-4 Complex with a Manganese(III)-Copper(II) Heterometallic Ring Motif / Lewis, A. J.; Garlatti, E.; Cugini, F.; Solzi, M.; Zeller, M.; Carretta, S.; Zaleski, C. M.. - In: INORGANIC CHEMISTRY. - ISSN 0020-1669. - 59:17(2020), pp. 11894-11900. [10.1021/acs.inorgchem.0c01410]

Slow Magnetic Relaxation of a 12-Metallacrown-4 Complex with a Manganese(III)-Copper(II) Heterometallic Ring Motif

Garlatti E.;Cugini F.;Solzi M.;Carretta S.;
2020-01-01

Abstract

The heterobimetallic metallacrown (MC), (TMA)2{Mn(OAc)2[12-MCMn(III)Cu(II)N(shi)-4](CH3OH)}·2.90CH3OH, 1, where TMA+ is tetramethylammonium, -OAc is acetate, and shi3- is salicylhydroximate, consists of a MnII ion captured in the central cavity and alternating unambiguous and ordered manganese(III) and copper(II) sites about the MC ring, a first for the archetypal MC structure design. DC-magnetometry characterization and subsequent simulation with the Spin Hamiltonian H = -J1(s1 + s3)·s5 - J2(s2 + s4)·s5 - J3ςi=14si·si+1 + d(sz,12 + sz,32) + μBςj=15gjsj·B indicates an S = 5/2 ground state and a sizable axial zero-field splitting on MnIII. AC-susceptibility measurements reveal that 1 displays slow magnetization relaxation akin to single-molecule magnet (SMM) behavior.
2020
Slow Magnetic Relaxation of a 12-Metallacrown-4 Complex with a Manganese(III)-Copper(II) Heterometallic Ring Motif / Lewis, A. J.; Garlatti, E.; Cugini, F.; Solzi, M.; Zeller, M.; Carretta, S.; Zaleski, C. M.. - In: INORGANIC CHEMISTRY. - ISSN 0020-1669. - 59:17(2020), pp. 11894-11900. [10.1021/acs.inorgchem.0c01410]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2880158
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