Jump to main content
Jump to site search

Issue 6, 2016
Previous Article Next Article

A family of tetranuclear quinolinolate Dy(III)-based single-molecule magnets: effects of periphery ligand replacement on their magnetic relaxation

Author affiliations

Abstract

Three complexes with formula {Dy(q)2(L)}23-OH)2{Dy(q)(L)}2(solvents) (where q = 8-quinolinolate; L = acetylacetone (acac) with (CH2Cl2)2 = solvent (1), 1,3-diphenyl-1,3-propanedione (DBM) and (CH2Cl2)2 = solvent (2), and hexafluoroacetylacetone (hfac) and CHCl3 = solvent (3)) were structurally and magnetically characterized. They have similar Dy4 structural cores bridged by N and O atoms from 8-quinolinolate, and only differ in the peripheral β-diketonate ligands. The variable-frequency and temperature alternating-current (ac) magnetic susceptibility measurements reveal that complexes 1 and 2 display significant zero-field single-molecule-magnet (SMM) behavior, while complex 3 exhibits the field-induced SMM behavior, albeit they possess the nearly same primary coordination sphere. The ac susceptibility measurement on the diluted samples verified that their relaxation was of purely molecular origin, and their distinct slow magnetic behaviors were related to the replacement of the peripheral β-diketonate ligand, which is responsible for their different individual Dy(III) ions’ magnetic anisotropy and intramolecular coupling, as confirmed by ab initio calculation.

Graphical abstract: A family of tetranuclear quinolinolate Dy(iii)-based single-molecule magnets: effects of periphery ligand replacement on their magnetic relaxation

Back to tab navigation

Supplementary files

Publication details

The article was received on 05 Nov 2015, accepted on 21 Dec 2015 and first published on 21 Dec 2015


Article type: Paper
DOI: 10.1039/C5DT04362J
Author version
available:
Download author version (PDF)
Dalton Trans., 2016,45, 2674-2680

  •   Request permissions

    A family of tetranuclear quinolinolate Dy(III)-based single-molecule magnets: effects of periphery ligand replacement on their magnetic relaxation

    D. Zhang, Y. Tian, W. Sun, H. Li, P. Chen, Y. Zhang and P. Yan, Dalton Trans., 2016, 45, 2674
    DOI: 10.1039/C5DT04362J

Search articles by author

Spotlight

Advertisements