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Magnetochemistry 2018, 4(1), 6; https://doi.org/10.3390/magnetochemistry4010006

Tuning the Structure and Properties of Lanthanoid Coordination Polymers with an Asymmetric Anilato Ligand

1
Instituto de Ciencia Molecular (ICMol), Departamento de Química Inorgánica, Universidad de Valencia, C/ Catedrático José Beltrán 2, 46980 Paterna, Spain
2
ICFO-Institut de Ciencies Fotoniques, Barcelona Institute of Science and Technology, 08860 Castelldefels, Spain
*
Authors to whom correspondence should be addressed.
Received: 6 December 2017 / Revised: 21 December 2017 / Accepted: 26 December 2017 / Published: 2 January 2018
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Abstract

Five new anilato-based, Ln(III)-containing, layered compounds have been prepared with the asymmetric ligand chlorocyananilato (C6O4(CN)Cl)2−; different Ln(III) ions Ce(III), Pr(III), Yb(III), and Dy(III); and the three different solvents H2O, dimethylsolfoxide (DMSO), and dimethylformamide (DMF). Compounds [Ce2(C6O4(CN)Cl)3(DMF)6]·2H2O (1), [Pr2(C6O4(CN)Cl)3(DMF)6] (2), [Pr2(C6O4(CN)Cl)3(DMSO)6] (3), [Yb2(C6O4(CN)Cl)3(DMSO)4]·2H2O (4) and [H3O][Dy(C6O4(CN)Cl)2(H2O)]·4H2O (5) show the important role that the Ln(III) size, as well as the size and shape of the solvent may play in the crystal structure of each compound. Compounds 14 present (6,3)-2D hexagonal lattices, with important differences in the coordination number and geometry of the Ln(III) ion, as well as in the distortion of the hexagonal cavities, depending on the Ln(III) and solvent size. Compound 5 (the only one prepared with water) presents a (4,4)-2D square lattice, where the Dy(III) ions are surrounded by four chelating anilato ligands. Compounds 24 are essentially paramagnetic, confirming the presence of weak (if any) magnetic coupling mediated by the anilato ligands when connecting Ln(III) ions. Compounds 24 showed a red shift and a broadening of the emission band of the ligand. Compound 4 also showed a strong emission band attributed to the Yb(III), suggesting an antenna effect of the ligand. An energy transfer diagram is proposed to explain these luminescent properties. View Full-Text
Keywords: magnetic coordination polymers; lanthanoids; anilato-based compounds; chlorocyananilato; honeycomb layers; luminescent properties magnetic coordination polymers; lanthanoids; anilato-based compounds; chlorocyananilato; honeycomb layers; luminescent properties
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Gómez-Claramunt, P.; Benmansour, S.; Hernández-Paredes, A.; Cerezo-Navarrete, C.; Rodríguez-Fernández, C.; Canet-Ferrer, J.; Cantarero, A.; Gómez-García, C.J. Tuning the Structure and Properties of Lanthanoid Coordination Polymers with an Asymmetric Anilato Ligand. Magnetochemistry 2018, 4, 6.

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