Highly Sensitive and Selective Fluorescent Sensor for Distinguishing Cadmium from Zinc Ions in Aqueous Media
作者:Lin Xue、Chun Liu、Hua Jiang
DOI:10.1021/ol900315r
日期:2009.4.2
A fluorescentsensor, QA, based on acetamidoquinoline with DPA as receptor, was synthesized. In aqueous buffer solution, QA demonstrates high selectivity for sensing Cd2+ with about 40-fold enhancement in fluorescence quantum yield and picomolar sensitivity (Kd = 0.25 ± 0.03 pM). Moreover, sensor QA can distinguish Cd2+ from Zn2+ via two different sensing mechanisms (PET for Cd2+; ICT for Zn2+), and