Please use this identifier to cite or link to this item: https://doi.org/10.1021/ic301784m
Title: Heterometallic Tetranuclear [Ln(2)(III)Co(2)(III)] Complexes Including Suppression of Quantum Tunneling of Magnetization in the [(Dy2Co2III)-Co-III] Single Molecule Magnet
Authors: Langley, Stuart K
Chilton, Nicholas F
Ungur, Liviu 
Moubaraki, Boujemaa
Chibotaru, Liviu F
Murray, Keith S
Keywords: Science & Technology
Physical Sciences
Chemistry, Inorganic & Nuclear
Chemistry
NUCLEAR-SPIN
RELAXATION
FAMILY
Issue Date: 5-Nov-2012
Publisher: AMER CHEMICAL SOC
Citation: Langley, Stuart K, Chilton, Nicholas F, Ungur, Liviu, Moubaraki, Boujemaa, Chibotaru, Liviu F, Murray, Keith S (2012-11-05). Heterometallic Tetranuclear [Ln(2)(III)Co(2)(III)] Complexes Including Suppression of Quantum Tunneling of Magnetization in the [(Dy2Co2III)-Co-III] Single Molecule Magnet. INORGANIC CHEMISTRY 51 (21) : 11873-11881. ScholarBank@NUS Repository. https://doi.org/10.1021/ic301784m
Abstract: Using a heterometallic approach the synthesis, structures, and magnetic properties are reported for the complexes [Ln III2Co III2(OMe) 2(teaH) 2(O 2CPh) 4(MeOH) 4](NO 3) 2·MeOH·H 2O {Ln = Gd (1a), Tb (2a), and Dy (3a)} and [Ln III2Co III2(OMe) 2(teaH) 2(O 2CPh) 4(MeOH) 2(NO 3) 2]·MeOH·H 2O {Ln = Gd (1b), Tb (2b), and Dy (3b)}. Both compounds for the respective lanthanide ions are found to be isolated within the same crystal. Each Ln III dinuclear unit is incorporated within a diamagnetic Co III/organic ligand backbone utilizing triethanolamine and benzoic acid as bridging ligands. Magnetic studies reveal an absence of any observable coupling interaction for the Gd case. The Dy analogue displays single molecule magnet (SMM) behavior with a large energy barrier to magnetization reversal of 88.8 K, and the quantum tunneling of the magnetization (QTM) is effectively suppressed because of the nonmagnetic exchange ground state of the molecule. Dilution of the Dy complex into an isostructural diamagnetic yttrium matrix allowed us to determine aspects of the relaxation mechanism within the system. © 2012 American Chemical Society.
Source Title: INORGANIC CHEMISTRY
URI: https://scholarbank.nus.edu.sg/handle/10635/228847
ISSN: 00201669
1520510X
DOI: 10.1021/ic301784m
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