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Issue 1, 2017
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3D oxalato-bridged lanthanide(III) MOFs with magnetocaloric, magnetic and photoluminescence properties

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Abstract

Four isostructural 3D lanthanide(III) metal–organic frameworks with the general formula (H6edte)0.5[LnIII(ox)2(H2O)] (Ln = Gd (1), Tb (2), Dy (3) and Ho (4); H4edte = N,N,N′,N′-tetrakis(2-hydroxyethyl)ethylenediamine) and ox = oxalate have been synthesized from oxalate. These compounds were characterized using single-crystal X-ray diffraction, FTIR and TGA/DTG. The magnetic investigation has been performed for 1–4 and the results reveal that a Gd(III) containing MOF has the highest magnetic density and exhibits a larger cryogenic magnetocaloric effect (ΔSm = 35.9 J kg−1 K−1 for ΔH = 9 T at 2.0 K) with a high Debye temperature (θD = 342(3) and rD = 35). For the Dy derivative, an ac-out-of-phase signal was found, and further measurements under an applied field of 1000 Oe showed frequency-dependent out-of-phase magnetic susceptibility. Solid-state luminescence indicates that Tb and Dy-containing complexes are photoluminescent materials.

Graphical abstract: 3D oxalato-bridged lanthanide(iii) MOFs with magnetocaloric, magnetic and photoluminescence properties

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Publication details

The article was received on 04 Oct 2016, accepted on 14 Nov 2016 and first published on 14 Nov 2016


Article type: Paper
DOI: 10.1039/C6DT03843C
Citation: Dalton Trans., 2017,46, 116-124
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    3D oxalato-bridged lanthanide(III) MOFs with magnetocaloric, magnetic and photoluminescence properties

    M. N. Akhtar, Y. Chen, M. A. AlDamen and M. Tong, Dalton Trans., 2017, 46, 116
    DOI: 10.1039/C6DT03843C

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