Terphenyl-phenanthroline conjugate as a Zn2+ sensor: H2PO4− induced tuning of emission wavelength
作者:Vandana Bhalla、Ruchi Tejpal、Manoj Kumar
DOI:10.1039/c2dt30754e
日期:——
A new terphenyl-based macrocycle 5 incorporating phenanthroline as a fluorophore has been designed, synthesized and examined for its recognition ability toward various cations (Pb2+, Hg2+, Ba2+, Cd2+, Ag+, Zn2+, Cu2+, Ni2+, Co2+, K+, Mg2+, Na+ and Li+) by UV-vis, fluorescence and NMR spectroscopy. The receptor 5 showed highly selective âOffâOnâ fluorescence signaling behavior for Zn2+ ions in THF. Interestingly, the addition of H2PO4â ions to the [5-Zn] complex regulates the binding site for additional Zn2+ ions and hence leads to a blue-shifted emission band.
我们设计、合成了一种含有菲罗啉作为荧光团的新型三联苯基大环 5,并通过紫外-可见光谱、荧光光谱和核磁共振光谱研究了它对各种阳离子(Pb2+、Hg2+、Ba2+、Cd2+、Ag+、Zn2+、Cu2+、Ni2+、Co2+、K+、Mg2+、Na+ 和 Li+)的识别能力。受体 5 在四氢呋喃中对 Zn2+ 离子表现出高度选择性的 "OffâOnâ "荧光信号行为。有趣的是,在[5-Zn]复合物中加入 H2PO4â离子会调节额外 Zn2+离子的结合位点,从而导致蓝移发射带。