一种有机-无机电荷转移配合物的合成、结构及性能研究

A charge-transfer complex, [(C₂H₄OH)₃NH]₂·[HPMo₁₂O₄₀]·3H₂O, has been synthesized and characterized.The crystal structure of the complex was determined by X-ray diffraction. It belongs to orthorhombic, space grounp Pnna, with a=1.541 30(5) nm, b=1.884 23 (7) nm, c=2.049 06(7) nm, α=β=γ=90.00°, V=5.950 8(4) nm³, Z=4, D_c=2.427 Mg·m^-3 , F(000)=4 132, μ(Mo Kα)=2.568 mm^-1. The structure was refined to R₁=0.043 5 and wR₂=0.122 4 by full-matrix least-squares method. The O atoms of the polyoxometalate, the C atoms of the organic substrates and the O atoms of water molecules are involved in hydrogen bonding. Spectral data support the presence of an electronic interaction between the organic substrate and the inorganic anion in the solid state. It is strongly photochromic under ultraviolet light resulting from charge-transfer. The electrochemical behavior of the compound shows that the redox peak currents are proportional to the scan rate in pH=4.0 NaAc-HAc buffer solution, which indicates that the electrode reaction are surface controlled processes.

Synthesis and Properties of an Organic-Inorganic Charge-Transfer Complex