Construction of a novel turn-on-off fluorescence sensor used for highly selective detection of thiamine via its quenching effect on <i>o</i>
-phen-Zn<sup>2+</sup>
complex
作者:Hui Zhang、Hongyun Chen、Hongxi Li、Shuang Pan、Yalin Ran、Xiaoli Hu
DOI:10.1002/bio.3519
日期:2018.9
for the determination of thiamine (TM) has been developed. As known, the o‐phenanthroline (o‐phen) has inner fluorescence, though when reacted with zinc ions to form the o‐phen–Zn2+ complex the fluorescence intensity was enhanced effectively, while upon addition of TM into the o‐phen–Zn2+ complex solution, the intensity of the system was gently quenched, which was termed the ‘turn‐on–off’ probe. Notably
在这项工作中,已经开发出一种简单且选择性的荧光传感器方法,称为“打开-关闭”,用于测定硫胺素(TM)。如已知的,Ô -phenanthroline(ø -苯)具有内荧光,尽管当用锌离子反应以形成ø -苯的Zn 2+复合物的荧光强度有效地提高,而在添加TM进入ø -苯-Zn 2+复合溶液中,系统强度被轻轻淬灭,这被称为“开启-关闭”探针。值得注意的是,该方法对TM具有高度选择性,灵敏的测定结果,检出限为0.25μmolL -1荧光强度降低与TM浓度成正比,范围为0.84–80.0μmolL -1。此外,还通过探索傅立叶变换红外(FT-IR),核磁共振(NMR)光谱研究了所提出的机理。此外,这种方法已成功地应用于实际样品中以TM检测,结果令人满意。