mixing with Co2+, a distinct color change (from orange to red under visible light) was visible to naked eyes accompanied with remarkable fluorescence quenching. A hypochromatic shift (ca. 27 nm) and a new peak at 487 nm were observed in the absorption spectra of 3. Furthermore, 3 was also applied for the detection of Co2+ by using a smartphone with the calculated limit of detection down to 0.47 μM.
新型荧光比色
化学传感器1,8-双2- N- [2'-(8'-羟基-9,10-
蒽醌-1-基氧基)乙基]
苯并咪唑鎓基}乙氧基} -9',10'-制备了
蒽醌六氟磷酸盐(3),并通过1 H和13 C NMR光谱进行了表征;还获得了其单晶结构。通过荧光和紫外滴定,1 H NMR滴定,HRMS和红外光谱,我们探索了3的阳离子识别性能,结果表明3是一种高效的Co 2+
化学传感器。与Co 2+混合后,肉眼可以看到明显的颜色变化(在可见光下从橙色变为红色),并伴有明显的荧光猝灭。在3的吸收光谱中观察到了一个色差位移(约27 nm)和一个在487 nm处的新峰。此外,使用智能手机将3应用于Co 2+的检测,计算出的检测下限降至0.47μM。