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研究了电子给体化合物对甲基紫精在聚乙烯醇膜中光色互变行为的影响。发现在甲基紫精光还原反应中,加入添加剂的给电子能力和吸湿性是影响反应的两个重要因素。给电子能力的增强有利于光照生色速率常数(k)的提高,而吸湿性的增强则加速其逆反应,不利于光还原反应的进行。
The effects of electron donor compounds on the photochromic behavior of methyl viologen in polyvinyl alcohol films were investigated. It was found that the electron-donating ability and hygroscopicity of additives were the two important factors affecting the reaction in methyl violet photoreduction. The enhancement of electron donors is conducive to the increase of phototropism rate constant (k), while the enhancement of hygroscopicity accelerates the reverse reaction, which is not conducive to the photoreduction.