Systematic Tuning of the Magnetic Properties in Mixed-Metal MOF-74

Megumi Mukoyoshi; Mitsuhiko Maesato; Shogo Kawaguchi; Yoshiki Kubota; Keigo Cho; Yasutaka Kitagawa; Hiroshi Kitagawa

doi:10.1021/acs.inorgchem.2c00646

Systematic Tuning of the Magnetic Properties in Mixed-Metal MOF-74

Inorg Chem. 2022 May 16;61(19):7226-7230. doi: 10.1021/acs.inorgchem.2c00646. Epub 2022 May 4.

Authors

Megumi Mukoyoshi¹, Mitsuhiko Maesato¹, Shogo Kawaguchi², Yoshiki Kubota³, Keigo Cho⁴, Yasutaka Kitagawa⁴, Hiroshi Kitagawa¹

Affiliations

¹ Division of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan.
² Research and Utilization Division, Japan Synchrotron Radiation Research Institute (JASRI), SPring-8, Hyogo 679-5198, Japan.
³ Department of Physics, Graduate School of Science, Osaka Metropolitan University, Sakai, Osaka 599-8531, Japan.
⁴ Division of Chemical Engineering, Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan.

PMID: 35506706
DOI: 10.1021/acs.inorgchem.2c00646

Abstract

Recently, mixed-metal metal-organic frameworks (MOFs) have been attracting much attention in various fields. In this study, we have systematically investigated the magnetic properties of Co_xNi_1-x-MOF-74 [Co_2xNi_2(1-x)(dhtp), where H₄dhtp = 2,5-dihydroxyterephthalic acid] with two different kinds of metals (Co and Ni) across the composition range 0 ≤ x ≤ 1. Bimetallic Co_xNi_1-x-MOF-74 (x = 0.752, 0.458, and 0.233) were successfully synthesized and confirmed to have homogeneous metal distributions. Weak ferromagnetic (canted antiferromagnetic) behavior was exhibited, while homometallic Co-MOF-74 and Ni-MOF-74 are antiferromagnetic. We also investigated the effects of C₂H₄ sorption on the magnetic properties and found that C₂H₄-adsorbed Co_0.5Ni_0.5-MOF-74 exhibited a change in the interchain magnetic interaction.