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Radical Solutions for Hysteresis in Single-Molecule Magnets

Total Cost €


EC-Contrib. €






Project "RadMag" data sheet

The following table provides information about the project.


Organization address
postcode: BN1 9RH

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country United Kingdom [UK]
 Total cost 1˙584˙202 €
 EC max contribution 1˙584˙202 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2014-CoG
 Funding Scheme ERC-COG
 Starting year 2015
 Duration (year-month-day) from 2015-09-01   to  2020-08-31


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    THE UNIVERSITY OF SUSSEX UK (BRIGHTON) coordinator 1˙050˙608.00


 Project objective

Single-molecule magnets (SMMs) display magnetic hysteresis that is molecular in origin, and these materials have huge potential to be developed as nano-scale devices. The big challenge is to create SMMs that function without the need for liquid-helium cooling.

This project will develop new SMMs that combine the strong magnetic anisotropy of lanthanide ions with a series of novel radical ligands. Our innovative SMMs will have controllable molecular and electronic structures, which will ultimately enable hysteresis at unprecedented temperatures.

Highly unusual di- and tri-metallic Ln-SMMs are proposed in which the metals are bridged by radicals with heavy Group 15 (phosphorus-bismuth) and Group 16 (sulphur-tellurium) donor atoms. Trimetallic SMMs will also be based on hexaazatriphenylene (HAT) radicals, and dimetallic SMMs will also be based on nindigo radicals, both of which are nitrogen-donor ligands.

The SMM field is dominated by systems with diamagnetic ligands. Our radical ligands have never been used in SMM studies: their diffuse unpaired spin provides a way of switching off the quantum tunnelling mechanisms that otherwise prevent hysteresis. We will exploit the rich electrochemistry of the target ligands: heavy p-block radicals have huge spin densities on the donor atoms; HAT radicals can have up to three unpaired electrons; reduced or oxidized nindigo radicals allow access to redox-switchable SMMs. In the HAT-bridged SMMs, the use of ligands with more than one unpaired electron is unprecedented. The heavy p-block ligands are themselves are novel.

The PI’s approach to SMMs has already established new directions in lanthanide chemistry and in molecular magnetism. He now proposes a new, radical approach to SMMs with potential to re-define the state of the art, and to extend the frontiers of a vibrant multi-disciplinary field. Achieving the aims will provide a major step towards using SMMs for applications at practical temperatures.


year authors and title journal last update
List of publications.
2017 Thomas Pugh, Nicholas F. Chilton, Richard A. Layfield
Antimony-ligated dysprosium single-molecule magnets as catalysts for stibine dehydrocoupling
published pages: 2073-2080, ISSN: 2041-6520, DOI: 10.1039/C6SC04465D
Chem. Sci. 8/3 2019-05-30
2017 Fu-Sheng Guo, Richard A. Layfield
Strong direct exchange coupling and single-molecule magnetism in indigo-bridged lanthanide dimers
published pages: 3130-3133, ISSN: 1359-7345, DOI: 10.1039/C7CC01046J
Chem. Commun. 53/21 2019-05-30
2016 Thomas Pugh, Nicholas F. Chilton, Richard A. Layfield
A Low-Symmetry Dysprosium Metallocene Single-Molecule Magnet with a High Anisotropy Barrier
published pages: 11082-11085, ISSN: 1433-7851, DOI: 10.1002/anie.201604346
Angewandte Chemie International Edition 55/37 2019-05-30
2016 Richard Grindell, Veacheslav Vieru, Thomas Pugh, Liviu F. Chibotaru, Richard A. Layfield
Magnetic frustration in a hexaazatrinaphthylene-bridged trimetallic dysprosium single-molecule magnet
published pages: 16556-16560, ISSN: 1477-9226, DOI: 10.1039/C6DT01763K
Dalton Trans. 45/42 2019-05-30
2016 Jani O. Moilanen, Nicholas F. Chilton, Benjamin M. Day, Thomas Pugh, Richard A. Layfield
Strong Exchange Coupling in a Trimetallic Radical-Bridged Cobalt(II)-Hexaazatrinaphthylene Complex
published pages: 5521-5525, ISSN: 1433-7851, DOI: 10.1002/anie.201600694
Angewandte Chemie International Edition 55/18 2019-05-30

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