Self-assembled hybrid solids of luminescent Ru(II) polypyridyl complexes and polyoxometalates

Abstract Two new hybrid compounds, [Ru(bpy) 3 ][W 6 O 19 ] ( 1 ) and [Ru(bpy) 3 ] 2 [Mo 8 O 26 ]∙6H 2 O ( 2 ) (bpy = 2, 2′-bipyridyl) have been synthesized hydrothermally and characterized using single crystal X-ray diffraction, TG, IR, FL, and UV–vis spectroscopy. Their crystal structures exhibit unique supramolecular interactions between [Ru(bpy) 3 ] 2 + and polyoxometalate units. Compound 1 shows anion–π interactions between the Linqvist unit W 6 O 19 2 − and the aromatic ring of the [Ru(bpy) 3 ] 2 + complex. In compound 2 , no significant anion–π interactions between the β-isomer of [Mo 8 O 26 ] 4 − and the [Ru(bpy) 3 ] 2 + unit were observed. Upon excitation at the λ max (450 nm) of the MLCT band of the [Ru(bpy) 3 ] 2 + , compound 1 shows an emission centered at 599 nm and compound 2 displays an emission centered at 613 nm.