A Zn<sup>2+</sup>-specific turn-on fluorescent probe for ratiometric sensing of pyrophosphate in both water and blood serum
作者:Jinghan Wen、Zhirong Geng、Yuxin Yin、Zhong Zhang、Zhilin Wang
DOI:10.1039/c0dt01262a
日期:——
A novel fluorescent sensor composed of a naphthalene functionalized tetraazamacrocycle ligand 3,6,9,15-tetraazabicyclo[9.3.1]pentadeca-1(15),11,13-triene-3-methyl naphthalene (1) and Zn2+ has been designed and prepared, which can be utilized for selective and ratiometric sensing of pyrophosphate (PPi) over other phosphate-containing anions in aqueous solution at physiological pH. Notably, the water soluble 1 itself also exhibits a selective enhanced fluorescent response to Zn2+, and the complex 1-Zn2+ thus formed eventually fulfils the synergic Zn2+ coordination-altered strategy with PPi. Furthermore, the ratiometric sensing of 1-Zn2+ towards PPi performed well even in blood serum milieu. Finally, the sensor 1-Zn2+ was successfully employed to monitor a real-time assay of inorganic pyrophosphatase (PPase) by means of ratiometric fluorescent measurements for the first time.
本研究设计并制备了一种新型荧光传感器,该传感器由萘功能化四氮杂环配体 3,6,9,15- 四氮杂双环[9.3.1]十五碳-1(15),11,13-三烯-3-甲基萘(1)和 Zn2+ 组成,可用于在生理 pH 值的水溶液中选择性地按比例感测焦磷酸(PPi)而不是其他含磷阴离子。值得注意的是,水溶性 1 本身对 Zn2+ 也表现出选择性增强荧光响应,由此形成的复合物 1-Zn2+ 最终实现了与 PPi 的协同 Zn2+ 配位改变策略。此外,即使在血清环境中,1-Zn2+ 对 PPi 的比率感应也表现良好。最后,传感器 1-Zn2+ 被首次成功地用于通过比率荧光测量法监测无机焦磷酸酶(PPase)的实时检测。