Keggin结构钴取代硅钨酸盐聚苯胺掺杂材料的合成及性质

以Keggin结构钴取代杂多硅钨酸盐异构体α，β_i-K_6-nH_nSiW₁₁Co(H₂O)O₃₉]·xH₂O( β_i=β₁，β₂，β₃)为掺杂剂，采用固相合成法制备了4种聚苯胺掺杂材料。用元素分析、红外光谱、紫外-可见光谱、SEM、X-射线粉末衍射、热重分析等对材料进行了表征，测定了材料的热稳定性、荧光性和导电性。实验结果表明：合成的掺杂态聚苯胺新材料具有较好的热稳定性、荧光性和导电性，室温电导率为7.5 × 10^-2 S·cm^-1，每种掺杂材料都有一个荧光发射峰，其发光中心来自于掺杂态聚苯胺极化子能带与价带之间的跃迁。

Synthesis and Properties of Polyaniline Doped with Cobalt Substituted Silicotungstate Isomers in Keggin Structure

The polyaniline hybrid materials doped with cobalt substituted silicotungstate isomers α,βi-K6-nHnSiW11Co(H2O)O39]·χH2O(βi＝β1,β2,β3)have been prepared.The materials were characterized by elemental analysis,IR spectrascopy,UV-Vis,scanning electron microscopy(SEM),TG and X-ray powder diffraction(XRD).Fluorescence and conductivity of the materials were determined.The results indicate that SiW11Co/PANI have better thermal stability,fluorescence and conductivity;the conductivity of the materials is 7.5× 10-2 S·cm-1 at room temperature.Each of the polyaniline hybrid materials has one emission spectrum from the transition of the electrons between exciton band(produced due to doping)and valence band.