A luminescent [Ag3S3]n-tube based metal–organic framework

Solvothermal treatment of silver nitrate, pyridine-4-thione (4-pdtH) and NH4SCN at 140 °C for 3 days produced a three-dimensional metal–organic framework [Ag3(4-pdt)(SCN)2] (1) in which [Ag3S3]n tubes act as secondary building units and pyridine rings and CN groups act as linkers. At ambient temperature, 1 shows a blue emission band assigned as from a ligand-centred n → π∗ or π → π∗ process.