A lamella 2D silver(I) coordination polymer constructed from in situ generated 2-mercaptobenzoic acid

The reaction of Ag2O and 2,2′-dithiodibenzoic acid (dtba) under ultrasonic condition gave rise to a novel metal–organic coordination polymer [Ag4(2-mba)2·(H2O)2]n (1) (2-H2mba = 2-mercaptobenzoic acid) involving in situ generated 2-mba ligand. Complex 1 shows a lamella 2D structure with a 63-hcb net which is comprised of fused Ag6 hexagonal rings. Moreover, 1 exhibits photoluminescence maximized at 468 nm upon 330 nm excitation at room temperature, which may be assigned to a ligand-to-metal charge transfer (LMCT) transition. Semiconducting behavior was also measured at room temperature with σ value of 3.24 × 10−5 S cm−1.