Self-assembly of silver polymers based on flexible isonicotinate ligand at different pH values: syntheses, structures and photoluminescent properties

Two interesting coordination polymers, [Ag8(IN)6(NO3)2] 1 and [Ag(IN)(HIN)]1/2 [Ag(IN)] 2 (HIN=isonicotinic acid) have been synthesized hydrothermally at different pH values. 1 crystallizes in the triclinic space group P-1, with image, image, image, image, image, image, image and image. Compound 1 is the first example of a bilayer framework, in which both single layers are connected by the bond interactions (Ag–O) between Ag from two two-dimensional (2D) single layers generated by the A building block and O atoms from one-dimensional (1D) chain constructed by the B building block, in which coordination modes of IN were reported for the first time. 2 crystallizes in the monoclinic space group P2(1)/c, with image, image, image, image, image and image. Compound 2 exhibits a 2D plywood-like structure assembled by hydrogen bonds and weak Ag–O interactions.