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RadMag SIGNED

Radical Solutions for Hysteresis in Single-Molecule Magnets

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EC-Contrib. €

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Project "RadMag" data sheet

The following table provides information about the project.

Coordinator
THE UNIVERSITY OF SUSSEX 

Organization address
address: SUSSEX HOUSE FALMER
city: BRIGHTON
postcode: BN1 9RH
website: http://www.sussex.ac.uk

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

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    THE UNIVERSITY OF SUSSEX UK (BRIGHTON) coordinator 1˙050˙608.00
2    THE UNIVERSITY OF MANCHESTER UK (MANCHESTER) participant 516˙439.00
3    KATHOLIEKE UNIVERSITEIT LEUVEN BE (LEUVEN) participant 17˙153.00

Map

 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.

 Publications

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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