新規な非晶質過酸化ポリモリブデン酸の合成および塗布薄膜の形成
摘要
New peroxo-polymQlybdic acids(Mo-HPA)were synthesized by the rea()tion Qf metallic molybdenum pQwder and a．queous hydrQgen peroxide．Several types of MQ-HPA s with different compositions and crystal prQperties were obtained by changing the amount of starト ing materials and the reaction time．Empirical formula of Mo-HPA was MoO3・xH202・ 1．7H20，where amorphQus phase was found at the peroxo ion concentration(x)1ess than O．37．The homogeneous thin film was fabricated by spin-coating the aqueQus solution Qf amorphous Mo-HPA，whereas crystalline MO-HPA was insoluble in water．Thermal stability and the po！yaion structure Qf Mo-HPA were investigted by therma1(TG，DTA，TPD)and spectroscopic(FTIR，Raman)analyses．AmQrphous Mo-HPA was less stable than amorphous perQxo-polytungstic acids(W-HPA)which was also spin-coatable，Severa！MoO60ctahedra seemed to form Mo-HPA polyanion，linking with edge-or corner-sharing． 1緒言 金属タングステン粉末を過酸化水素水に溶解すること により，非晶質の過酸化ポリタングステン酸(W-HPA) が合成される1-3)．W-HPAは水溶性であり，スピン塗