Assembly of dysprosium(iii) cubanes in a metal–organic framework with an ecu topology and slow magnetic relaxation

Abstract

A rare dysprosium(iii) metal–organic framework constructed using dysprosium(iii) cubanes as secondary building units has been reported to exhibit field-supported single-molecule magnet (SMM) behavior and an unprecedented ecu topology.

Highly proton-conducting lanthanide metal–organic frameworks featuring highly oxygenated ligands with slow magnetic relaxation or magnetocaloric effect

“…[31][32][33][34] Very recently, we found that the classical 2,5-dioxodo-1,4benzenedicarboxylate (H 4 dobdc) is a powerful ligand to prepare lanthanide coordination polymers with hydrophilic groups and coordination water molecules. 35,36 The bifunctional derivative of salicylic acid, H 4 dobdc, exhibits both intra-and intermolecular proton transfer, along with redox-active conversion between its enol and keto isomers. Its structural rigidity and four pH-dependent extractable protons render H 4 dobdc a compelling multifunctional organic ligand for generating stable and rigid highdimensional MOFs.…”

“…[37][38][39][40][41][42][43][44] As a result, we reported two isostructural lanthanide coordination chains with slow magnetic relaxation (Dy 3+ ) and magnetocaloric effect (Gd 3+ ). 35 Additionally, a Dy(III) MOF, utilizing Dy(III) cubanes as secondary building units, was found to display slow magnetic relaxation behavior under applied dc field and an rare ecu topology. 36 With its carboxyl and phenolic hydroxyl groups, the H 4 dobdc ligand is structurally effective in forming proton-conducting coordination polymers based on our studies and also a potential ligand for designing dual-functional Ln-MOFs.…”