Synthesis and unexpected photochemical behaviour of biphotochromic systems involving spirooxazines and naphthopyrans linked by an ethylenic bridge
作者:André Samat、Vladimir Lokshin、Karine Chamontin、David Levi、Gérard Pepe、Robert Guglielmetti
DOI:10.1016/s0040-4020(01)00693-7
日期:2001.8
molecules taken individually, unusual photochromic behaviour has been detected with compounds for which a double bond of Z-configuration links both entities by the 5 or 5′ positions of the naphthalenic parts. Indeed, in this case the thermally stable uncoloured and coloured forms (bistable system) can be photochemically converted acting as photochemical switches.
通过维蒂希反应,通过方便地官能化的螺[吲哚啉-萘并恶嗪]和萘并吡喃的偶联,制备了六种新的双光致变色化合物。与单独获取的分子相比,使用Z构型的双键通过萘部分的5或5'位置连接两个实体的化合物已检测到异常的光致变色行为。实际上,在这种情况下,可以将热稳定的无色和有色形式(双稳态体系)进行光化学转化,充当光化学开关。