Polymeric Iodoargentate Hybrids Incorporating Octakis- or Heptakis-Solvated Lanthanide Complexes: Syntheses, Crystal Structures, and Photocatalysis.

New iodoargentate hybrids containing lanthanide complexes, [La(DMA)]AgI·2HO () and [Ln(DMA)]AgI (Ln = Pr (), Sm(); DMA = ,-dimethylacetamide), were prepared by diffusion methods using DMA-solvated lanthanide complexes as structure-directing agents. The octakis-solvated La cation leads to formation of the 1-D nonanuclear [AgI] polymeric anion constructed by AgI tetrahedral units through edge sharing, while the heptakis-solvated Ln (Ln = Pr, Sm) cation affords the new 1-D hexadecanuclear [AgI] polymeric anion built up from AgI units by both corner and edge sharing. Compounds - possess band gaps of 2.58, 2.77, and 2.74 eV, respectively, and show steady photocurrents in the range 14.2-18.0 μA under Xe light irradiation. They are photocatalytic active in the degradation of organic pollutants of crystal violet (CV) and rhodamine B (RhB) in water at room temperature. and perform higher photocatalytic activities than in the CV degradation, which is attributed to the different photocurrent intensities. Photocatalytic mechanism investigations on compounds and show that h hole and ·O radical play major roles in the CV degradation, respectively.