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摘要
We synthesized tetraazamacrocycles 1 and 2 bearing two anthryl groups as sidearms, both of which exhibited high selectivity for the Zn-II ion in switching-on-type responses in aqueous solution. For ligand 1, Zn-II is coordinated by four nitrogen atoms of the macrocycle and two amino groups on the pendent arms, which results in proximity between the two fluorophores. So, 1-Zn-II shows obvious excimer emission in aqueous solution. When PPi or ATP was added (pH 7.4), the excimer emission of 1-Zn-II was quenched, whereas monomer emission was revived. To the best of our knowledge, no other known sensor has this characteristic under physiological pH conditions. At the same time, the obvious different fluorescence response of 1-Zn-II for PPi and ATP in water shows that receptor 1-Zn-II can be used as a selective fluorescent chemosensor for PPi and ATP anions.
- 出版日期2010-4
- 单位武汉大学
