Issue 14, 2012

An effective method for the synthesis of 3D inorganic Ln(iii)–K(i) sulfate open frameworks with unusually high thermal stability: in situ generation of sulfate anions

Abstract

Through the in situ decomposition of DMSO (dimethyl sulfoxide), heterometallic inorganic frameworks, formulated as [KLn(SO4)2H2O] (Ln = Sm 1, Eu 2, Gd 3, Tb 4, Dy 5, Ho 6, Er 7) were synthesized under the help of facile and effective one-pot solvothermal reactions. These in situ reactions enhanced the reactivity and coordination ability of the sulfate anions, leading to the formation of new 3D lanthanum sulfate frameworks with optical and magnetic properties. Compounds 2 and 4 are strong luminescent materials which display characteristic Eu3+ and Tb3+ emission bands in the visible region with high quantum yields and long luminescent lifetimes. Variable-temperature magnetic susceptibility studies revealed that 3 and 5–7 show anti-ferromagnetic behaviors. Their thermal stability, demonstrated from the TGA profiles and temperature dependent XRD measurements, is among the highest of reported lanthanum sulfate frameworks. Additionally, the band structure calculations for 3, and 7, based on the density functional theory methods, were also performed.

Graphical abstract: An effective method for the synthesis of 3D inorganic Ln(iii)–K(i) sulfate open frameworks with unusually high thermal stability: in situ generation of sulfate anions

Supplementary files

Article information

Article type
Paper
Submitted
22 Dec 2011
Accepted
06 Feb 2012
First published
27 Feb 2012

J. Mater. Chem., 2012,22, 6831-6837

An effective method for the synthesis of 3D inorganic Ln(III)–K(I) sulfate open frameworks with unusually high thermal stability: in situ generation of sulfate anions

H. Zhang, M. Zhang, C. Tian, N. Li, P. Lin, Z. Li and S. Du, J. Mater. Chem., 2012, 22, 6831 DOI: 10.1039/C2JM16779D

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