Influencing the properties of dysprosium single-molecule magnets with phosphine, phosphide and phosphinidene ligands

Pugh, Thomas, Tuna, Floriana, Ungur, Liviu, Collison, David, McInnes, Eric J L, Chibotaru, Liviu and Layfield, Richard A (2015) Influencing the properties of dysprosium single-molecule magnets with phosphine, phosphide and phosphinidene ligands. Nature Communications, 6 (7492). pp. 1-8. ISSN 2041-1723

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Abstract

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 cm1 and magnetic hysteresis up to 4.4 K.

Item Type: Article
Schools and Departments: School of Life Sciences > Chemistry
Depositing User: Richard Layfield
Date Deposited: 22 Aug 2018 16:18
Last Modified: 02 Mar 2021 11:42
URI: http://sro.sussex.ac.uk/id/eprint/78158

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