application in selective recognition of Cu2+ ions has been developed. The sensor shows “turn-off” type paramagnetic fluorescence quenching towards Cu2+ ions. The binding constant (Ka) of Cu2+ ions with the sensor was found to be 8.02 × 104 M−1 and binding stoichiometry was determined to be 1:1 based on the Job's plot analysis. The sensor can detect up to nanomolar (0.1 nM) level of Cu2+ ions from tap water
已经开发了合成二氢
喹唑啉酮衍
生物2-(
吡啶-2-基)-2,3-二氢
喹唑啉-4(1 H)-one的策略及其在选择性识别Cu 2+离子中的应用。传感器显示出对Cu 2+离子的“关闭”型顺磁荧光猝灭。发现Cu 2+离子与传感器的结合常数(K a)为8.02×10 4 M -1,根据乔布斯图分析确定结合
化学计量为1:1。该传感器可以检测自来
水中的最高纳摩尔(0.1 nM)Cu 2+离子
水平。QZP·Cu 2+ Cl·H 2的单晶O络合物通过X射线衍射表征,Cu 2+的顺磁性质通过电子自旋共振(ESR)光谱证明。