Issue 10, 2021

Magnetic properties of two GdIIIFeIII4 metallacrowns and strategies for optimizing the magnetocaloric effect of this topology

Abstract

Two GdIII FeIII4 metallacrown complexes are presented and analyzed for their magnetic properties. One of these species is newly identified and exhibits a bent ring geometry as opposed to the more conventional flatter conformation of the other. Both complexes are quite similar magnetically, exhibiting antiferromagnetic exchange coupling values ca. J(FeIII–N–O–FeIII) = −7 cm−1 and J(GdIII–O–FeIII) = −0.7 cm−1. When analyzed for the molecular magnetocaloric effect, maximum −ΔSm values of 7.3 J K−1 kg−1 at 3 K and at 6.1 J K−1 kg−1 at 4 K were exhibited. A detailed structural-magnetic correlation is established and an assessment of several similar magnetic metallacrowns with diverse metal combinations is given with regards to their potential magnetocaloric properties. Strategies for improving the magnetocaloric properties within the Metaln + FeIII4 family of metallacrowns are proposed regarding the ratio between coupling parameters J(FeIII–N–O–FeIII)/J(Metaln+–O–FeIII).

Graphical abstract: Magnetic properties of two GdIIIFeIII4 metallacrowns and strategies for optimizing the magnetocaloric effect of this topology

Supplementary files

Article information

Article type
Research Article
Submitted
16 Feb 2021
Accepted
08 Apr 2021
First published
09 Apr 2021

Inorg. Chem. Front., 2021,8, 2611-2623

Magnetic properties of two GdIIIFeIII4 metallacrowns and strategies for optimizing the magnetocaloric effect of this topology

E. V. Salerno, J. W. Kampf, V. L. Pecoraro and T. Mallah, Inorg. Chem. Front., 2021, 8, 2611 DOI: 10.1039/D1QI00207D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements