A two-dimensional silver–iodide organic network constructed from a unique [Ag₆I₆] hexagonal prism-based one-dimensional column motif

Abstract

A novel two-dimensional coordination polymer, poly[[μ2-1,3-bis(2-methyl-1H-imidazol-1-yl)propane]di-μ4-iodido-di-μ3-iodido-silver(I)], [Ag4I4(C11H16N4)]n, (I), has been synthesized by solvothermal reaction of AgNO3, KI and 1,3-bis(2-methyl-1H-imidazol-1-yl)propane (bmimp). In (I), the two unique Ag(I) cations have AgNI3 and AgI4 four-coordinated tetrahedral geometries. The bmimp ligand has imposed twofold symmetry. The Ag(I) cations and iodide anions form a unique one-dimensional polymeric column motif incorporating [Ag6I6] hexagonal prisms, which are then connected by bmimp ligands to form two-dimensional organic-inorganic layers. The layers are arranged in parallel in an ABAB fashion and are packed into the resultant three-dimensional supramolecular framework by van der Waals interactions.

Two Silver Coordination Network Compounds with Colorful Photoluminescence

“…Halogen atoms as simple ligands can adopt 1-, 2-, 3-, and 4-coordinated geometries, while the closed-shell d 10 electronic configuration of Ag­(I) can adopt 2-, 3-, 4-, and 5-coordinated geometries . Therefore, the structural diversity of Ag­(I)–halogen clusters relatively abundant, including the [AgX] monomeric unit, the rhomboid [Ag 2 X 2 ] dimeric unit, the split stair or zigzag [AgX] chain, the [Ag 2 X 2 ] n zigzag double chains, the [Ag 2 X 2 ] n helical chains, the wavelike [Ag 4 X 4 ] n chains, and the hexagonal prism-shaped [Ag 6 X 6 ] cluster unit …”

“…Proper organic bridging linkers are critical in constructing CNCs, and the selection of flexible ligands has been reported as a popular approach to construct flexible frameworks with versatile properties. The bis­(imidazole) ligand with flexible nature of -(CH 2 ) 4 - spacers as a good representative of nitrogen-donor bridging ligand is able to bend and rotate freely when coordinating to metal atoms . Combination of the flexibility of the long chain and the spatial orientation of the methyl groups of each imidazole ring may endow creation of various coordination polymers with fascinating properties, such as EWDP properties.…”