Issue 31, 2012

Syntheses, crystal structures and properties of new lead(ii) or bismuth(iii) selenites and tellurite

Abstract

Four new lead(II) or bismuth(III) selenites and a tellurite, namely, Pb3(TeO3)Cl4, Pb3(SeO3)2Br2, Pb2Cd3(SeO3)4I2(H2O), Pb2Ge(SeO3)4 and BiFe(SeO3)3, have been prepared and structurally characterized by single crystal X-ray diffraction (XRD) analyses. These compounds exhibit five different types of structures. The structure of Pb3(TeO3)Cl4 features a three-dimensional (3D) lead(II) chloride network with tellurite anions filling in the 1D tunnels of Pb4 4-member rings (MRs) along the c-axis. Pb3(SeO3)2Br2 contains a 3D network composed of lead(II) selenite layers interconnected by bromide anions. Pb2Cd3(SeO3)4I2(H2O) is a 3D structure based on 2D cadmium(II) selenite layers which are further connected by 1D lead(II) iodide ladder chains with lattice water molecules located at the 1D tunnels of the structure. Pb2Ge(SeO3)4 features a 3D framework constructed by the alternate arrangement of lead(II) selenite layers and germanium(IV) selenite layers in the [100] direction. The structure of BiFe(SeO3)3 is built on the 3D anionic framework of ion(III) selenite with the bismuth(III) ions located at its Fe6Se6 12-MR tunnels. Pb3(TeO3)Cl4 (Pna21) is polar and BiFe(SeO3)3 (P212121) is noncentrosymmetric. Powder second-harmonic generation (SHG) measurements using 1064 nm radiation indicate that BiFe(SeO3)3 exhibits a weak SHG efficiency of about 0.2 × KH2PO4 (KDP). Magnetic property measurements for BiFe(SeO3)3 show a dominant antiferromagnetic interaction with weak spin-canting at low temperatures. IR, UV-vis and thermogravimetric, as well as electronic structure calculations were also performed.

Graphical abstract: Syntheses, crystal structures and properties of new lead(ii) or bismuth(iii) selenites and tellurite

Supplementary files

Article information

Article type
Paper
Submitted
09 Mar 2012
Accepted
06 Jun 2012
First published
11 Jun 2012

Dalton Trans., 2012,41, 9532-9542

Syntheses, crystal structures and properties of new lead(II) or bismuth(III) selenites and tellurite

S. Zhang, C. Hu, P. Li, H. Jiang and J. Mao, Dalton Trans., 2012, 41, 9532 DOI: 10.1039/C2DT30560G

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