An inorganic-organic hybrid polyoxotungstogermanate based on [Ln(α-GeW11O39)2] dimer and dimethylammonium: Synthesis, crystal structure and photoluminescence property

Abstract

A novel inorganic-organic hybrid lanthanide-polyoxotungstogermanate, [NH2(CH3)2]13[Eu(α-GeW11O39)2]·8H2O (1) is directly prepared using raw material by hydrothermal synthesis method and characterized by single-crystal X-ray diffraction, PXRD, IR, solid-state UV–visible spectra and TG analyses. Compound 1 is constructed from [Eu(α-GeW11O39)2] dimer anions and dimethylammonium cations. It is an unusual example of crystal structure containing {Eu(α-GeW11O39)2} dimer and organic ammonium without alkali metal cations. The NH···O and CH···O hydrogen bonds link the [Eu(α-GeW11O39)2]13− cluster units and the dimethylammonium cations to a 3D supramolecular network. Compound 1 exhibits Eu3+ characteristic luminescent property with decay time of 2.342 ms.