A novel sandwich-type europium-substituted germanomolybdate linked with coordination cation [Cu(en)2]2+

A sandwich-type europium-substituted germanomolybdate, H(H2en)5[Cu(en)2] [Eu(GeMo11O39)2]·11H2O (1) (en = ethylenediamine) has been synthesized and structurally characterized by elemental analysis, IR spectroscopy, UV electronic spectroscopy, thermogravimetric analysis and single crystal X-ray diffraction. Complex 1 displays a one-dimensional zigzag chain framework built up from the [Eu(GeMo11O39)2]13− polyanions alternatively linked by [Cu(en)2]2+ cations. The photoluminescence property of solid samples for compound 1 has been investigated, and the spectrum exhibits obvious red fluorescence. The magnetic investigation on complex 1 indicates that the magnetic behavior attributes to a combined effect of depopulation and intermolecular antiferromagnetic interactions.