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Lanthanoid pyridyl-β-diketonate 'triangles'. New examples of single molecule toroics


Caporale, C and Sobolev, AN and Phonsri, W and Murray, KS and Swain, A and Rajaraman, G and Ogden, MI and Massi, M and Fuller, RO, Lanthanoid pyridyl-β-diketonate 'triangles'. New examples of single molecule toroics, Dalton Transactions, 49, (47) pp. 17421-17432. ISSN 1477-9226 (2020) [Refereed Article]

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Copyright 2020 The Royal Society of Chemistry

DOI: doi:10.1039/d0dt02855j


Trinuclear lanthanoid clusters have been synthesised and investigated as toroidal spin systems. A pyridyl functionalised β-diketonate, 1,3-bis(pyridin-2-yl)propane-1,3-dione (o-dppdH) has been used to synthesise a family of clusters of the form [Dy3(OH)2(o-dppd)3Cl2(H2O)4]Cl27H2O (1), [Tb3(o-dppd)33-OH)2(CH3CH2OH)3Cl3][Tb3(o-dppd)33-OH)2(H2O)(CH3CH2OH)2Cl3]Cl2H2O (2), [Ho3(OH)2(o-dppd)3Cl(H2O)5]Cl33H2O (3) and [Er3(OH)2(o-dppd)3Cl2(H2O)3(CH3OH)]Cl23H2OCH3OH (4). Despite the previous occurrence of this structural motif in the literature, these systems have not been widely investigated in terms of torodic behaviour. Magnetic studies were used to further characterise the complexes. DC susceptibility studies support weak antiferromagnetic exchange in the complexes. Slow magnetic relaxation behaviour is observed in the dynamic AC magnetic studies for complex 1. Theoretical studies predict that complex 1 and 3 have a non-magnetic ground state based on a toroidal arrangement of spins. Changes to the coordination environment in 2 do not support a toroic spin state. The prolate nature of the ErIII centres in complex 4 and large transverse anisotropy do not support the toroidal arrangement of lanthanoid spins in the complex.

Item Details

Item Type:Refereed Article
Keywords:lanthanoid, toroidal spin, magnetism
Research Division:Chemical Sciences
Research Group:Inorganic chemistry
Research Field:F-block chemistry
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the chemical sciences
UTAS Author:Fuller, RO (Dr Rebecca Fuller)
ID Code:143937
Year Published:2020
Funding Support:Australian Research Council (DE180100112)
Web of Science® Times Cited:3
Deposited By:Chemistry
Deposited On:2021-04-12
Last Modified:2022-08-23

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