Sandwich type organic-inorganic hybrid of 3d-4f heterometallic containing germanotungstates [{Cu2(1,10-phen)2(μ-CH3COO)2}Ln(α-GeW11O39)2]11 −: Syntheses, crystal structures, magnetic and photoluminescence properties

Alkali salts of organic-inorganic hybrid of 3d-4f heterometallic germanotungstates: [{Cu2(1,10-phen)2(μ-CH3COO)2}Ln(α-GeW11O39)2]11 − [Ln = PrIII (1a), NdIII (2a), SmIII (3a), EuIII (4a), GdIII (5a); 1,10-phen = 1.10-phenanthroline] have been prepared under mild reaction conditions. All these compounds were well characterized with SC-XRD, FT-IR spectroscopy, powder-XRD, liquid UV/vis, solid state photoluminescence spectroscopy, elemental analysis and thermo-gravimetric analysis (TGA). The magnetic measurement for the Gd-POM was also studied.192