Influencing the Properties of Dysprosium Single-molecule Magnets with Phosphorus Donor Ligands
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Single-molecule magnets are a type of coordination compound that can retain magnetic information at low temperatures. Single-molecule magnets based on lanthanides have accounted for many important advances, including systems with very large energy barriers to reversal of the magnetization, and a di-terbium complex that displays magnetic hysteresis up to 14 K and shows strong coercivity. Ligand design is crucial for the development of new single-molecule magnets: organometallic chemistry presents possibilities for using unconventional ligands, particularly those with soft donor groups. Here we report dysprosium single-molecule magnets with neutral and anionic phosphorus donor ligands, and show that their properties change dramatically when varying the ligand from phosphine to phosphide to phosphinidene. A phosphide-ligated, trimetallic dysprosium single-molecule magnet relaxes via the second-excited Kramers' doublet, and, when doped into a diamagnetic matrix at the single-ion level, produces a large energy barrier of 256 cm(-1) and magnetic hysteresis up to 4.4 K.
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Du J, Cobb P, Ding J, Mills D, Liddle S Chem Sci. 2023; 15(1):13-45.
PMID: 38131077 PMC: 10732230. DOI: 10.1039/d3sc05056d.
Mondal A, Price C, Tang J, Layfield R J Am Chem Soc. 2023; 145(36):20121-20131.
PMID: 37656516 PMC: 10510326. DOI: 10.1021/jacs.3c07600.
Structural and Magnetization Dynamics of Borohydride-Bridged Rare-Earth Metallocenium Cations.
Price C, Mondal A, Durrant J, Tang J, Layfield R Inorg Chem. 2023; 62(25):9924-9933.
PMID: 37314885 PMC: 10302870. DOI: 10.1021/acs.inorgchem.3c01038.
Zhang S, Mo W, Zhang J, Wu H, Li M, Lu X RSC Adv. 2022; 8(52):29513-29525.
PMID: 35557993 PMC: 9092431. DOI: 10.1039/c8ra06240d.
Shmelev M, Polunin R, Gogoleva N, Evstifeev I, Vasilyev P, Dmitriev A Molecules. 2021; 26(14).
PMID: 34299571 PMC: 8307922. DOI: 10.3390/molecules26144296.