Synthesis, structure, and photocatalytic properties of new dinuclear helical complex of silver(I) ions

The 6′,6″-(2-phenylpyrimidine-4,6-diyl)bis(6-methyl-2,2′-bipyridine) ligand L reacts with trifluoromethanesulfonate silver(I) to give dinuclear helical complex [Ag2L2](CF3SO3)2·H2O in which metal ions are in approximately heavily flattened tetrahedron coordination geometry. The complex has been characterized by spectroscopic techniques, elemental analysis, transmission and scanning electron microscopies, and thermogravimetry. The solid state structure of complex has been determined by X-ray diffractometry. The methylene blue (MB) degradation was studied with UV–Vis spectrophotometry. A maximum degradation efficiency of 90% of the dye has been achieved. Photodegradation of the dye follows second-order kinetics. [Ag2L2](CF3SO3)2·H2O is active photocatalyst of MB degradation under UV–Vis and sunlight irradiation.

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► Structure of a new silver(I) complex with N6-donor ligand.
► [Ag2(C32H24N6)2](CF3SO3)2·H2O as photocatalyst.
► Photocatalyst for the degradation of methylene blue.
► Photocatalyst active in sunlight.