A novel water-soluble highly selective “switch-on” ionic liquid-based fluorescent chemi-sensor for Ca(II)
作者:Reda F.M. Elshaarawy、Reham Ali、Sayed M. Saleh、Christoph Janiak
DOI:10.1016/j.molliq.2017.06.016
日期:2017.9
provides great selectivity fluorescence detection for Ca(II) ions in an important physiological pH range. Moreover, the interaction of Ca(II) with the deprotonated BISBS to produce a metal-ligand complex with a ratio of (1: 1) accompanying with an enhancement in the intensity of emission band located at 502 nm. Fluorescence switching-on during the chemical interaction between BISBS and Ca(II) ions is very
一种新颖的化学传感器,涉及新的双离子席夫碱传感器(BISBS),N,N'-双-[5-(((2,4-二氯吡啶二甲基)亚甲基)-3-甲氧基水杨基] -R,R-1,2-环己二亚胺已经合成并表征。BISBS化学传感器是基于内部电荷转移(ICT)荧光机制设计的。这种新型的水溶性化学传感器可在重要的生理pH范围内为Ca(II)离子提供出色的选择性荧光检测。此外,Ca(II)与去质子化的BISBS的相互作用产生比例为(1:1)的金属配体配合物,同时增强了502 nm处的发射带强度。用肉眼很容易注意到BISBS与Ca(II)离子之间化学相互作用期间的荧光开启,但是其他金属阳离子(例如碱金属,碱土金属和过渡金属)却没有任何荧光变化。新开发的BISBS传感器相继提供了低检测限(LOD)1。5 nM且在生理pH 7.6中快速追踪Ca(II)。因此,BISBS可以为检测环境和生物样品中的钙阳离子提供一种新颖的吉祥方法。