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本文介绍了光致变色现象的发现及发展,说明了光致变色现象的原理,综述了光致变色反应的类型及光致变色材料的应用。 相似文献
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A series of photochromic diarylethene derivatives containing different fluorophores was synthesized by the Sonogashira coupling reaction and characterized by ^1H nuclear magnetic resonance (NMR), ^13C NMR and mass spectroscopy. Photochromic conversion of Cz-MS was observed and its structural change was confirmed by proton NMR, Switchable absorption and emission phenomena were observed for these molecules. These phenomena were attributed to the reversible photochromic fluorescence resonance energy transfer (pcFRET) process. The design of this novel photochromic system of Py-4MS enables information to be processed in a non-destructive manner. This overcomes the problem of the destructive nature of tracking photochromism using ultraviolet (UV)-vis spectroscopy. 相似文献
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发现了具有逆光致变色性质的螺吡喃类化合物的结构特点,即在吲哚啉氮上连有极性基团,同时和吡喃环并连的芳环上具有强的吸电子基团.设计并合成了逆光致变色化合物1’-(2-羟乙基)-3’,3’-二甲基-6-硝基螺[吲哚啉-2,2’[2H-1]苯并吡喃].实验表明,用它配制成的逆光致变色油墨显示有很好的色度和耐疲劳度. 相似文献
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通过氯甲基化等一系列反应合成了含有醛基的螺吡喃,一种方法是在原合成方法基础上对最后一步提纯过程进行了改进,较简便地得到了纯净的化合物;另一种方法是在合成过程中加入抗氧化剂和阻聚剂直接得到纯度较高的化合物。简化了提纯步骤.两种方法中得到的化合物熔点都与文献值吻合较好.测试了化合物的光致变色性及荧光性. 相似文献