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Issue 8, 2016
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Thermostability and photoluminescence of Dy(iii) single-molecule magnets under a magnetic field

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Abstract

A series of compounds [ADyL4]·[solvent] composed of a dysprosium(III) ion coordinated by four chelated naphthyridine-like ligands (L = 4-hydroxy-8-methyl-1,5-naphthyridine-3-carbonitrile) and an alkali metal ion (A = Na, K, Rb, Cs) were synthesized and characterized. They behave as single-molecule magnets under a zero dc field with an effective energy barrier of around 95 cm−1. Meanwhile, the main part, [ADyL4], of these SMMs is thermostable and sublimable. The geometric structures of three sublimed compounds are identical to the original ones without solvents, which is confirmed by X-ray diffraction using single crystal and powder samples. The static and dynamic magnetic properties remain unchanged before and after sublimation. Luminescence measurements at 5–77 K were performed to verify the energy gap between low-lying states and to understand the pathway of the thermal relaxation process of magnetization, as well as to inspect the tiny variation in magnetic sublevels for the ground term of Dy(III). The photoluminescence spectra under a magnetic field (0–36 T) for the Dy-SMMs are investigated for the first time. The energy splitting of the two lowest sublevels of the ground term 6H15/2 of Dy(III) are analyzed using the Zeeman formula.

Graphical abstract: Thermostability and photoluminescence of Dy(iii) single-molecule magnets under a magnetic field

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Publication details

The article was received on 14 Mar 2016, accepted on 12 May 2016 and first published on 12 May 2016


Article type: Edge Article
DOI: 10.1039/C6SC01157H
Chem. Sci., 2016,7, 5020-5031
  • Open access: Creative Commons BY-NC license
    All publication charges for this article have been paid for by the Royal Society of Chemistry

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    Thermostability and photoluminescence of Dy(III) single-molecule magnets under a magnetic field

    Y. Bi, C. Chen, Y. Zhao, Y. Zhang, S. Jiang, B. Wang, J. Han, J. Sun, Z. Bian, Z. Wang and S. Gao, Chem. Sci., 2016, 7, 5020
    DOI: 10.1039/C6SC01157H

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