杂多蓝的研究 Ⅰ.具有Dawson结构的钼砷杂多蓝的制备及性质

Studies on Heteropoly Blue Ⅰ.Preparation and Properties of the Heteropoly Molybdoarsenante Blue with Dawson Structure

本文详细地研究了具有 Dawson 结构的钼砷杂多酸(H_6As_2Mo_(18)O_(62))的两电子、四电子、六电子还原杂多蓝的制备条件,离析出了它们的钾盐、铵盐及四丁基胺盐.找到了合适的电解电位.通过电位滴定、极谱、电子光谱、红外光谱、X 射线粉末衍射和光电子能谱的研究,确证了所希望得到的产物.研究表明,杂多蓝的结构与还原前相比未发生明显变化.水溶液稳定性的研究指出,杂多蓝要比还原前的杂多阴离子稳定,存在的 pH 范围加宽.指认了可见-红外区出现的谱带.

The condition of producing the two-,four-,and six-electron of heteropolymolybdoarsenate blue belonging to the Dawson structure was examined in detaile inthis thesis.Their potassium salts were isolated.Proper electrolytic potential was found.The products were proved to be what we expect to get by titration,polarogarm,electronicspectra,IR,X-ray powder diffration,and photo-election spectrum.The structure ofproducts do not change compared with unreduced compound.The stability of aqueoussolution was studied,the result shows that heteropoly blue in water solution is morestable,the stable range of pH was widened.Electronic spectra of heteropoly blue wasstudied in particular.Their new spectral bands have been assigned.