RSC Advances p. 99933 - 99939 (2016)
Update date:2022-08-17
Topics:
Dai, Yanpeng
Liu, Xiaoyan
Wang, Peng
Fu, Jiaxin
Yao, Kun
Xu, Kuoxi
A new quinoline-based fluorescent probe 1 has been designed and synthesized. Fluorescence emission spectra of the probe showed red-shift and obvious enhancement of fluorescent intensity upon the addition of Al3+ (turn-on). 1-Al3+ showed high selectivity for Fe3+ over other metal ions, and eliminated the interference of Al3+ during Fe3+ detection (turn-off). It showed highly selective relay recognition of Al3+ and Fe3+via a fluorescence "off-on-off" mechanism. Fluorescence spectra indicated that the response of 1-Al3+ to Fe3+ was caused by central metal displacement. The detection limits for the analysis of Al3+ and 1-Al3+-Fe3+ ions were calculated to be 2.20 × 10-6 M and 1.96 × 10-5 M, respectively. Living HeLa cell imaging studies revealed that the probe was cell-permeable and it could be used to detect intracellular Al3+ and Fe3+ ions.
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