Jump to main content
Jump to site search

Issue 40, 2012
Previous Article Next Article

The first μ-Ge2Se8 ligand to lanthanide(III) centers: solvothermal syntheses and characterizations of lanthanide selenidogermanate complexes with a pentadentate polyamine as a co-ligand

Author affiliations

Abstract

Solvothermal reactions of elements Ge and Se with Ln2O3 in a pentadentate polyamine, tetraethylenepentamine (tepa), produced novel neutral lanthanide–selenidogermanate polymers [{Ln(tepa)(μ-OH)}2(μ-Ge2Se8)]n (Ln = Eu 1, Gd 2, Dy 3). The reaction with Dy2O3 in ethylenediamine (en) afforded an ionic selenidogermanate [{Dy(en)3}2(μ-OH)2]Ge2Se6 (4). In compounds 1–3, the Ln3+ ions are coordinated by a tepa and two OH ligands to form binuclear [{Ln(tepa)}2(μ-OH)2]4+ fragments. Two GeSe4 tetrahedra are linked through two Se–Se bonds to form a novel [Ge2Se8]4− unit containing a six-membered Ge2Se4 ring in the chair conformation. The [Ge2Se8]4− unit acts as a bridging ligand via the trans terminal Se atoms to interlink the [{Ln(tepa)}2(μ-OH)2]4+ fragments into one-dimensional polymers [{Ln(tepa)(μ-OH)}2(μ-Ge2Se8)]n. Compounds 1–3 are the first examples of solvothermally prepared lanthanide complexes with a selenidogermanate anion as a ligand. The [Ge2Se6]4− anion in 4 is composed of two GeSe4 tetrahedra sharing a common edge, and is charge compensated by a [{Dy(en)5}2(μ-OH)2]4+ complex cation. The formation of the [Ge2Se8]4− and [Ge2Se6]4− anions and their behavior towards lanthanide ions in 1–4 show the significant influence of ethylene polyamines on the solvothermal synthesis of Ln selenidogermanates.

Graphical abstract: The first μ-Ge2Se8 ligand to lanthanide(iii) centers: solvothermal syntheses and characterizations of lanthanide selenidogermanate complexes with a pentadentate polyamine as a co-ligand

Back to tab navigation

Supplementary files

Publication details

The article was received on 03 May 2012, accepted on 15 Aug 2012 and first published on 16 Aug 2012


Article type: Paper
DOI: 10.1039/C2DT30960B
Citation: Dalton Trans., 2012,41, 12439-12445
  •   Request permissions

    The first μ-Ge2Se8 ligand to lanthanide(III) centers: solvothermal syntheses and characterizations of lanthanide selenidogermanate complexes with a pentadentate polyamine as a co-ligand

    R. Chen, W. Tang, J. Liang, W. Jiang, Y. Zhang and D. Jia, Dalton Trans., 2012, 41, 12439
    DOI: 10.1039/C2DT30960B

Search articles by author

Spotlight

Advertisements