A Highly K<sup>+</sup>-Selective Phenylaza-[18]crown-6-Lariat-Ether-Based Fluoroionophore and Its Application in the Sensing of K<sup>+</sup>Ions with an Optical Sensor Film and in Cells
作者:Sandra Ast、Thomas Schwarze、Holger Müller、Aleksey Sukhanov、Stefanie Michaelis、Joachim Wegener、Otto S. Wolfbeis、Thomas Körzdörfer、Axel Dürkop、Hans-Jürgen Holdt
DOI:10.1002/chem.201302350
日期:2013.10.25
lariat‐free phenylaza‐[18]crown‐6 ether analogues. Probe 1 shows a high K+/Na+ selectivity and a 2.5‐fold fluorescence enhancement was observed in the presence of 100 mM K+ ions. A fluorescent membrane sensor, which was prepared by incorporating probe 1 into a hydrogel, showed a fully reversible response, a response time of 150 s, and a signal change of 7.8 % per 1 mM K+ within the range 1–10 mM K+. The
在这里,我们报告了两个带有香豆素荧光团的苯基氮杂[18]皇冠-6套索状醚的合成(1和2),我们发现化合物1是在模拟生理条件下K +离子的极佳探针。在苯胺基部分的邻位存在2-甲氧基乙氧基套索状化合物,对于化合物1和2相对于无套索状苯基氮杂[18] crown-6醚类似物的稳定性的大幅提高至关重要。探针1显示出高的K + / Na +选择性,在100 m M存在下观察到2.5倍的荧光增强ķ +离子。通过将探针1掺入水凝胶中制备的荧光膜传感器显示出完全可逆的响应,150 s的响应时间以及1–10 m M范围内每1 m M K +的信号变化7.8%。 K +。该膜很容易制造(在固态聚酯支持物上只有一个传感层),但未观察到浸出。此外,化合物1迅速渗透到细胞中,具有细胞相容性,适合在细胞外和细胞内水平上对K +离子进行荧光成像。