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By a ligand-oriented assembly approach, the heterometallic–organic framework [Pb4Cu2I2(pdc)4(DMF)6]n(1; H2pdc = 3,5-pyridinedicarboxylic acid, DMF = N,N-dimethylformamide) has been successfully fabricated with the assistance of a N-/O-containing H2pdc molecule. 1displays a 3D architecture constructed from the combination of discrete [Cu2I2] moieties and infinite Pb–O chains with the organic linkers. A bright yellow luminescence emission of 1can be observed, and temperature-dependent emission spectra indicate the huge potential of 1to serve as a molecular luminescence thermometer. In addition, through a luminescence turn-off effect, compound 1can be considered to be a superior sensor for the sensitive detection of Fe3+. Moreover, photocatalysis experiments have been performed on 1, suggesting that the title catalyst could induce and accelerate the decomposition of dye pollutants.

By using a N-containing tetradentate ligand tetra(pyridine-4-yl)benzene-1,4-diamine (TBD) as the coordination linker, a chemically stable metal–organic framework [Cu2I2(TBD)·DMF]n(1) has been successfully synthesized (DMF = N,N-dimethylformamide). Compound 1features a three-dimensional architecture wherein the [Cu2I2] moieties are formed and further serve as the secondary building units to assist the fabrication of the final network. Solid-state photoluminescence behavior has been investigated on compound 1. Notably, the sensing experiments suggest that Ag+exhibits a dramatic quenching effect on luminescence emission of 1, implying the great potential of the title compound as an Ag+sensor. Related verification experiments have been conducted in detail. Moreover, compound 1presents an effective I2sorption performance, which could be further regarded as a promising adsorbent for the removal of targeted species.