Hydrothermal syntheses, crystal structures and thermal stabilities of three lanthanide(III) diphosphonates

Author： Chen Hui   Li Jing   Sun Zhengang   Zhu Yanyu   Zhang Jing   Zhao Yan   Zhang Na   Lu Xin   Liu Lei  

Publisher： Taylor & Francis Ltd

ISSN： 0095-8972

Source： Journal of Coordination Chemistry, Vol.62, Iss.2, 2009-01, pp. : 294-301

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Abstract

Three lanthanide diphosphonates, [NH3(CH2)4NH3]Ln[hedpH][hedpH2] (Ln = Sm (1), Gd (2), Dy (3); hedp = 1-hydroxyethylidenediphosphonate), have been synthesized by hydrothermal reaction with 1,4-diaminobutane as the template and characterized by single-crystal X-ray diffraction, infrared spectroscopy, elemental analysis and thermogravimetric analysis. The vertex-sharing connections of the LnO7 polyhedra and CPO3 tetrahedra result in an infinite chain along the b axis. The chains are cross-linked by hydrogen bonds to form a three-dimensional network with channels containing the [NH3(CH2)4NH3]2+ cations.

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