Construction of novel quantum-confined structure with lead halide/gemini surfactant hybrids

Novel organic–inorganic hybrid compounds, C₁₆H₄₄N₄Pb₃I₁₀ and C₁₄H₃₄N₂Pb₂I₆, were synthesized by solvent diffusion recrystallization from the dimethylsulfoxide solution containing PbI₂ and gemini ammonium surfactants with different head groups. The results of single crystal X-ray structural analysis showed that the inorganic region of C₁₆H₄₄N₄Pb₃I₁₀ has quasi one-dimensional chains of [Pb₃I₁₀]^4? units, whereas that of C₁₂H₃₀N₂Pb₂I₆ has one-dimensional chains of face-sharing PbI₆ octahedra. The absorption and fluorescence spectra of these compounds also indicate the formation of one-dimensional inorganic chains and quantum-confined structures.