Precisely nano-sized aluminosilicate particles (average diameter size 50 to 80 nm) with tailor-made internal surface polarity are suitable as host material for photochromic dyes of the chromene type in order to produce optical transparent photoswitchable polymer films. The sophisticated host material does accomplish two important requirements for a technical application, appropriate internal space for the light induced reversible switching process of the adsorbed dye and suppression of disturbing chemical reactions. The adjustment of the internal surface polarity of the host material was achieved by silane reagents which could be observed by means of specific solvatochromic probes.
具有定制内表面极性的精确纳米级
硅酸铝颗粒(平均直径尺寸为 50 至 80 纳米)适合作为
铬系光致变色
染料的宿主材料,以生产出光学透明的光开关聚合物薄膜。精密的宿主材料可以满足技术应用的两个重要要求,即为吸附
染料的光诱导可逆转换过程提供适当的内部空间,以及抑制干扰性
化学反应。通过
硅烷试剂实现了对主材料内部表面极性的调节,并可通过特定的溶解变色探针进行观察。