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

A novel inorganic organic hybrid lanthanide polyoxotungstogermanate, [NH2(CH3)(2)](13)[Eu(alpha-GeW11O39)(2)center dot 8H(2)O (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(alpha-GeW11O39)(2)] dimer anions and dimethylammonium cations. It is an unusual example of crystal structure containing {Eu(alpha-GeW11O39)(2)} dimer and organic ammonium without alkali metal cations. The N-H center dot center dot center dot O and C-H center dot center dot center dot O hydrogen bonds link the [Eu(alpha-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. (C) 2021 Elsevier B.V. All rights reserved.