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Thermostability and Photoluminescence under the Magnetic Field of Dy(III) Single-Molecule Magnets

DOI: 10.1039/C6SC01157H DOI Help

Authors: Ye Bi (Beijing National Laboratory for Molecular Sciences) , Cheng Chen (Wuhan National High Magnetic Center, Huazhong University of Science and Technology) , Yifang Zhao (Beijing National Laboratory for Molecular Sciences) , Yiquan Zhang (Jiangsu Key Laboratory for NSLSCS, School of Physical Science and Technology, Nanjing Normal University) , Shang-da Jiang (Beijing National Laboratory for Molecular Sciences) , Bing-wu Wang (Beijing National Laboratory for Molecular Sciences) , Junbo Han (Wuhan National High Magnetic Center, Huazhong University of Science and Technology) , Jun Liang Sun (Beijing National Laboratory for Molecular Sciences) , Zuqiang Bian (Beijing National Laboratory for Molecular Sciences) , Zheming Wang (Beijing National Laboratory for Molecular Sciences) , Song Gao (Beijing National Laboratory for Molecular Sciences)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Chem. Sci.

State: Published (Approved)
Published: May 2016

Open Access Open Access

Abstract: A series of compounds [ADyL4]∙[solvents] 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) are synthesized and characterized. They behave as single-molecule magnets under zero dc field with effective energy barrier of 95 cm-1 around. Meanwhile, the main part [ADyL4] of these SMMs are thermostable and sublimable. The geometry structures of three sublimed compounds are identical to the original ones without solvents, which are confirmed by X-ray diffraction using single crystal and powder samples. The static and dynamic magnetic properties remain unchanged before and after sublimation. The luminescence measurement at 5–77 K is performed to verify the energy gap between low-lying states, to understand the pathway of the thermal relaxation process of magnetization, as well as to inspect the tiny variation of the magnetic energies for the ground term of Dy (III). The photoluminescence spectra under the magnetic field (0–36 T) for the Dy-SMM 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 by the Zeeman formula.

Journal Keywords: Single-molecule magnets; Thermostability;Sublimation; Photoluminescence under the pulse magnetic field; Dysprosium

Subject Areas: Chemistry


Instruments: I11-High Resolution Powder Diffraction

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