Synthesis,Characterization,and Electronic Structures of Organically Templated Lead Halides with One-and Two-Dimensional Hybrid Structures,[(nbq)(Pbl3)]_n and{[(CH3)3NC2H4N(CH3)3]3(Pb6l18)}_n

摘要

Two new organically templated lead(II) iodide complexes,[(nbq)(PbI3)]_n 1 and {[(CH3)3NC2H4N(CH3)3]3(Pb6l18)}_n 2,have been synthesized in the presence of aromatic and aliphatic quaternary ammonium compounds,N-(n-butyl)quinolinium (nbq~+) and [(CH3)3NC2H4N(CH3)3]~(2+),respectively,acting as structure-directing agents.Both 1 and 2 consist of uncoordinated structure-directing agents and inorganic moieties bound to the organic structure-directing agents.In 1 ,an inorganic (PbI_3~-)_n one-dimensional polyanion chain is built up by face-sharing of distorted PbI6 tetrahedra.The inorganic framework of 2 presents a two-dimensional arrangement that could be discussed in terms of [Pb3I10]~(4-) building blocks.Static attractive interactions between organic countercations and inorganic moieties were revealed through the crystal packing.Density functional theory calculations indicate that 1 possesses semiconductor properties,tuned by the it-electrons of nbq~+.In contrast,2 is conductive in the direction of aliphatic quaternary ammonium moiety.