A novel sensitive sensor for Cu2+ and multi-switch based on a diarylethene with a 2-(2′-hydroxyphenyl)benzothiazole unit
作者:Xiaorong Dong、Renjie Wang、Gang Liu、Peng Liu、Shouzhi Pu
DOI:10.1016/j.tet.2016.04.007
日期:2016.6
A new asymmetrical photochromic diarylethene with a 2-(2′-hydroxyphenyl)benzothiazole unit has been synthesized. It underwent reversible cyclization and cycloreversion reactions upon alternating irradiation with lower energy UV (297 nm, 25 μW/cm2) and visible light, while it could induce intramolecular proton transfer reaction upon irradiation with higher energy UV light (254 nm, 92 μW/cm2) with distinct
合成了具有2-(2'-羟基苯基)苯并噻唑单元的新的不对称光致变色二芳基乙烯。在较低能量的紫外光(297 nm,25μW/ cm 2)和可见光交替照射下,它经历了可逆的环化和环还原反应,而在较高能量的紫外光(254 nm,92μW/ s )下,它可以诱导分子内质子转移反应。厘米2)的颜色变化明显。当用碱刺激二芳基乙烯时,闭环异构体的最大吸收从539nm红移到660nm,并且颜色从紫色变为青色。此外,添加酸将其荧光强度提高了5.5倍,发射峰从596 nm蓝移到570 nm,同时颜色从浅橙色变为亮绿色,而碱可有效地淬灭其荧光强度。最后,二芳基乙烯是朝着铜高度选择性2+与显著吸收和荧光的变化,这使得Cu的“裸眼”检测2+可能的。