Issue 1, 2021

A systematic study of halide-template effects in the assembly of lanthanide hydroxide cluster complexes with histidine

Abstract

A series of polynuclear lanthanide (Ln) complexes were prepared by the hydrolysis of lanthanide ions using L-histidine as a supporting ligand. Halide ions (X = Cl, Br, and I) have been found to play a major role in templating the assembly of pentadecanuclear complexes for Nd(III) and Gd(III) with the definitive evidence of μ5-X in the cluster core formed by five corner-shared cubane units of [Ln43-OH)4]8+. For the heavier and smaller Er(III), analogous pentadecanuclear complex templates by μ5-Cl and μ5-Br were also isolated, but an otherwise identical reaction in the presence of added I afforded a dodecanuclear complex with a core of four corner-shared cubanes. Two I guests are found, one on each side of the wheel-like structure and in close contact with the μ3-OH groups. For the medium size Gd(III), a dodecanuclear complex with two I can also be formed by changing the metal–ligand ratio. The halide-template effects are analyzed, and the production of different cluster complexes can be rationalized by invoking the match of the physical size of the lanthanide and halide ions. The magnetic properties of dodecanuclear 6 were investigated for magnetic cooling applications, and it showed a magnetic entropy change of 30.95 J kg−1 K−1 at 2 K for 7 T.

Graphical abstract: A systematic study of halide-template effects in the assembly of lanthanide hydroxide cluster complexes with histidine

Supplementary files

Article information

Article type
Research Article
Submitted
17 авг 2020
Accepted
29 сеп 2020
First published
30 сеп 2020

Inorg. Chem. Front., 2021,8, 26-34

A systematic study of halide-template effects in the assembly of lanthanide hydroxide cluster complexes with histidine

W. Huang, Z. Zhang, Y. Wu, W. Chen, D. A. Rotsch, L. Messerle and Z. Zheng, Inorg. Chem. Front., 2021, 8, 26 DOI: 10.1039/D0QI01004A

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