Jump to main content
Jump to site search

Issue 3, 2018
Previous Article Next Article

Isostructural lanthanide-based metal–organic frameworks: structure, photoluminescence and magnetic properties

Author affiliations

Abstract

A series of the anhydrous lanthanide-based metal–organic frameworks (Ln-MOFs) were successfully synthesized under hydrothermal conditions of Ln(III) ions with 3,4′-oxybis(benzoate) (3,4′-oba), oxalate (ox) and 1,10-phenanthroline (phen). Structural analyses revealed that they are isostructural 3D open-frameworks with the formula of [Ln(3,4′-oba) (phen)(ox)0.5]n (Ln = Sm for 1, Eu for 2, Gd for 3, Tb for 4, and Dy for 5) and the topology of {33·43·58·6}. Within the 3D structure, the [LnO6N2] units are bridged by ox to form [Ln2ox] dimers and then are further connected by 3,4′-oba ligands. These complexes feature high chemical stabilities in common solvents, boiling water, and acidic (pH = 3) and alkaline (pH = 13) solutions and high thermal stability even up to 400 °C. The photoluminescence and magnetic properties were studied. Especially, 2 shows bright red emission with a high luminescence efficiency of 40.51%. We mainly discuss the luminescence properties of 2 in common solvents and inorganic ions. It shows luminescence stability in common solvents and the ability to detect ammonia and Fe3+ ions under a long excitation wavelength (350 nm). Significantly, magnetic studies reveal that the Dy-MOF, 5, shows a typical single-molecule magnetic behavior. Under zero dc field, compound 5 shows temperature and frequency dependent out-of-phase (χ′′M) signals, indicating the existence of slow magnetic relaxation.

Graphical abstract: Isostructural lanthanide-based metal–organic frameworks: structure, photoluminescence and magnetic properties

Back to tab navigation

Supplementary files

Publication details

The article was received on 26 Oct 2017, accepted on 06 Dec 2017 and first published on 07 Dec 2017


Article type: Paper
DOI: 10.1039/C7DT04024E
Citation: Dalton Trans., 2018,47, 925-934
  •   Request permissions

    Isostructural lanthanide-based metal–organic frameworks: structure, photoluminescence and magnetic properties

    L. Luo, X. Qu, Z. Li, X. Li and H. Sun, Dalton Trans., 2018, 47, 925
    DOI: 10.1039/C7DT04024E

Search articles by author

Spotlight

Advertisements