酞菁锌掺杂二氧化硅凝胶基质的光谱学特征

利用溶胶凝胶技术将四磺化酞菁锌 (ZnPcS4)成功地引入到了二氧化硅凝胶基质中 ,制备了均匀掺杂的有机 /无机复合干凝胶。研究ZnPcS4分子在溶胶凝胶过程中紫外可见吸收光谱的变化规律以探索其在复合体系中的存在状态。实验表明 ,在溶胶阶段 ,随着时间的延长 ,紫外可见吸收光谱中单体的吸收峰强度增大 ,说明凝胶中酞菁单体的浓度增大 ;而形成凝胶后 ,随着时间的延长 ,紫外可见吸收光谱中单体的吸收峰强度减小 ,二聚体的吸收峰强度增大 ,说明由于体系结构和微化学环境的变化 ,酞菁分子趋向于聚合。

Spectrum Characterization of ZnPcS4 in Silica Sol-Gel Material

Zinc tetrasulfo phthalocyanine (ZnPcS 4) was successfully doped into SiO 2 xerogel by sol gel technique and so a homogeneously doped composite was prepared. The changes of ZnPcS 4 UV/Vis absorption spectra during the sol gel process were studied correlated with the amount of dimers and monomers. The results show that the absorption intensity of ZnPcS 4 monomers increases with the time during the early stage of the sol gel process, but decreases in the latter stage. The reasons of such intensity variation are given from the change of the micro environment in which ZnPeS 4 existed during the sol gel process.