Issue 4, 2024

An alkoxyborate-bridging Dy2 single-molecule magnet with ferromagnetic coupling

Abstract

Non-radical bridges capable of coupling Ising-type magnetic anisotropy in a collinear manner are rather limited in the construction of dinuclear single-molecule magnets (SMMs). Here, we report the first alkoxyborate-bridging SMM [Dy2(B(OMe)4)(Hdapp)2(tBu-DDTP)2](BPh4)·3MeOH (1, where H2dapp = (2,6-diacetylpyridine)-bis(2-pyridyl-hydrazone) and HtBu-DDTP = 4-(tert-butyl)-2,6-di(1,3-dithiolan-2-yl)phenol) obtained by either in situ alcoholysis of tetraphenylborate or addition of tetramethoxyborate. The alkoxyborate bridge chelates two anisotropic Dy(III) ions in a μ222 coordination fashion, and the axial anisotropy axes of Dy(III) sites approach collinearity with a ferromagnetic coupling constant of +1.38 cm−1. Magnetic studies and ab initio calculations indicate that 1 and the Y(III)-diluted analogue (1@Y) both exhibit slow magnetic relaxation behaviour dominated by the Raman-like mechanism. However, magnetic dilution of 1 in a yttrium matrix proves that 4f–4f ferromagnetic coupling plays an important role in the inhibition of zero-field fast quantum tunneling of magnetization (QTM), since the zero-field relaxation time for 1 is two orders of magnitude longer than that of 1@Y at 2 K. These findings demonstrate an alternative and effective approach for achieving axially ferromagnetically coupled SMMs using alkoxyborate bridges.

Graphical abstract: An alkoxyborate-bridging Dy2 single-molecule magnet with ferromagnetic coupling

Supplementary files

Article information

Article type
Research Article
Submitted
30 Oct 2023
Accepted
17 Dec 2023
First published
20 Dec 2023

Inorg. Chem. Front., 2024,11, 1061-1069

An alkoxyborate-bridging Dy2 single-molecule magnet with ferromagnetic coupling

Y. Zhou, W. Deng, S. Du, Y. Chen, Z. Ruan, S. Wu, J. Liu and M. Tong, Inorg. Chem. Front., 2024, 11, 1061 DOI: 10.1039/D3QI02230G

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