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Title: Six lanthanide supramolecular frameworks based on mixed m-/p-hydroxybenzoic acid and 1,10-phenanthroline tectons: syntheses, crystal structures, and properties
Author: Chen, Min
Hu, Min
Xu, Wen-Ming
Sañudo Zotes, Eva Carolina
Fang, Shao-Ming
Liu, Chun-Sen
Keywords: Estructura cristal·lina (Sòlids)
Propietats magnètiques
Layer structure (Solids)
Magnetic properties
Issue Date: 27-Jul-2016
Publisher: Elsevier Ltd
Abstract: To further explore the research of the coordination possibilities of lanthanide ions with m-/p-hydroxybenzoic acid isomers in the presence of chelating N-donor ligand 1,10-phenanthroline (phen), six lanthanide supramolecular frameworks based on 3- and 4-hydroxybenzoic acids, namely [Dy(m-L)(m-HL) (phen)]center dot H2O (1) (m-H2L = 3-hydroxybenzoic acid), [Ln(m-HL)(3)(phen)] (Ln = Gd for 2 and Tb for 3), [Ln(p-HL)(3)(phen)(H2O)] (Ln = Dy for 4, Gd for 5, and Tb for 6; p-H2L = 4-hydroxybenzoic acid), were synthesized and characterized. Structural analyses reveal that complex 1 has a two-dimensional (2-D) sheet structure while complexes 2 and 3 take the dinuclear structures in the 3-hydroxybenzoate derivatives. In the 4-hydroxybenzoate derivatives, complexes 4-6 are isostructural and incorporated by monomeric units. Finally, all the complexes exhibit three-dimensional (3-D) supramolecular frameworks (bcu net for I; bct nets for 2, and 4-6; hex net for 3) with the aid of abundant hydrogen bonding, pi center dot center dot center dot pi and C-H center dot center dot center dot pi interactions. The results reveal that the different positions of the-OH substituent and coordination modes of hydroxybenzoic acids adjust the final coordination networks. Moreover, the magnetic and luminescent properties of the complexes have also been investigated and discussed. (C) 2016 Elsevier Ltd. All rights reserved.
Note: Versió postprint del document publicat a:
It is part of: Polyhedron, 2016, vol. 113, p. 132-143
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ISSN: 0277-5387
Appears in Collections:Articles publicats en revistes (Química Inorgànica i Orgànica)

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