By conjugating spiropyran chloride 8 with 2-amino-N-(quinolin-8-yl)acetamide (5), multifunctionalized spirobenzopyran derivative SPQN was designed and synthesized as a water soluble colorimetric and fluorescent turn-on chemosensor for Zn2+. In 50% aqueous ethanol buffer solution, SPQN displayed a selective chelation fluorescence enhancement (16-fold) at 650 nm and visible color change (from colorless to red) with Zn2+ among the metal ions examined. In addition, as the third channel to display the metal binding characteristics of SPQN, operating on an efficient FRET process between the quinoline and the merocyanine moiety of the sensor, ratiometric determination of Zn2+ can be realized.
通过将螺
吡喃
氯化物 8 与 2-
氨基-N-(
喹啉-8-基)乙酰胺 (5) 结合,设计并合成了多功能化的螺苯并
吡喃衍
生物 SPQN,作为一种
水溶性比色和荧光开关
化学传感器,用于检测 Zn2+。在 50%
乙醇缓冲溶液中,
SPQN 显示出对 Zn2+ 的选择性螯合荧光增强(16 倍)和颜色变化(从无色变为红色),在所测试的
金属离子中表现突出。此外,
SPQN 的
金属结合特性还可以通过高效的荧光共振能量转移 (FRET) 过程,在
喹啉和传感器的美罗
氰基团之间进行,实现
金属离子 Zn2+ 的比率测定。