We synthesized three different derivatives of bis-spiropyran using simple organic reactions with high yields. BSP1, a derivative of bis-spiropyran having a connection at the position 6' and BSP2, a derivative of bis-spiropyran having a connection at the position 5 and BSP3, a derivative of bis-spiropyran containing a dithienylethene group between two spiropyran moieties were synthesized. The optical properties of BSPs were characterized. UV-Vis spectra showed that BSPs exhibit reversible photo-isomerization and the efficiency of photo-isomerization is highly dependent on the position of nitro group. BSPs having nitro group at para position of hydroxy group showed the higher efficiency of photo-isomerization that the one having nitro group at ortho position. The optical microscope images obtained under ultraviolet or visible light exposure demonstrated that the formation of nanorods can be reversibly controlled by optical signal.
我们通过简单有机反应以高产率合成了三种不同的联
吡咯吡喃衍
生物。
BSP1是一种在6'位连接的联
吡咯吡喃衍
生物,
BSP2是一种在5位连接的联
吡咯吡喃衍
生物,而
BSP3则是一种在两个
吡咯吡喃单元之间包含二
硫烯基团的联
吡咯吡喃衍
生物。这些
BSP的光学性质得到了表征。UV-Vis光谱显示,
BSPs展现出可逆的光异构化现象,且光异构化的效率高度依赖于硝基的位置。含有羟基对位硝基的
BSPs显示出比含有羟基邻位硝基的
BSPs更高的光异构化效率。在紫外或可见光照射下获得的光学显微镜图像表明,纳米棒的形成可以通过光学信号进行可逆控制。