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Four one-dimensional lanthanide–phenylacetate polymers exhibiting luminescence and magnetic cooling/spin-glass behavior

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Abstract

Four isostructural lanthanide coordination polymers with a phenylacetate (PAA) ligand, [Ln(PAA)3(H2O)]n (Ln = Eu (1); Gd (2); Tb (3); Dy (4)), were synthesized under hydrothermal conditions. Complexes 1–4 display a one-dimensional (1D) wave chain structure bridged by the carboxylate of the PAA ligand, which was generated via the in situ decarboxylation of phenylmalonic acid. Magnetic studies suggest the presence of ferromagnetic Ln⋯Ln coupling in the 1D chain of 1–4. Meanwhile, 2 has a significant cryogenic magnetocaloric effect with the maximum −ΔSm of 26.73 at 3 K and 7 T, and 3 and 4 show interesting spin-glass behavior, which is rarely reported for Ln-containing complexes. Additionally, the solid-state photophysical properties of 1 and 3 display strong characteristic Eu3+ and Tb3+ photoluminescence emission in the visible region, indicating that Eu- and Tb-based luminescence are sensitized by the effective energy transfer from the ligand to the metal centers.

Graphical abstract: Four one-dimensional lanthanide–phenylacetate polymers exhibiting luminescence and magnetic cooling/spin-glass behavior

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Publication details

The article was received on 22 Sep 2017, accepted on 07 Nov 2017 and first published on 07 Nov 2017


Article type: Paper
DOI: 10.1039/C7DT03562D
Citation: Dalton Trans., 2017, Advance Article
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    Four one-dimensional lanthanide–phenylacetate polymers exhibiting luminescence and magnetic cooling/spin-glass behavior

    Z. Li, Y. Xu, X. Zhang, B. Zhai, F. Zhang, J. Zhang, C. Zhang, S. Li and G. Cao, Dalton Trans., 2017, Advance Article , DOI: 10.1039/C7DT03562D

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