acetonitrile due to the free rotation of the 2-aminophenyl moiety. After reacting with phosgene, APQ is converted to a new restricted intramolecular motion product APQU1. Owing to the specific cyclization reactions, APQ exhibits an obvious fluorescence response toward phosgene with a large Stokes shift (104 nm), instant response (less than 20 s), and low detection limit (0.16 ppm). Moreover, the APQ-loaded
由于
光气的高毒性和商业上的可利用性,迫切需要快速而可靠地检测
光气,以应对其对公共安全的潜在严重威胁。一种新的基于2-(2-
氨基苯基)
喹唑啉-4(3 H)-一(APQ)的荧光探针APQ在这项工作中被开发为
光气的快速,高度灵敏和选择性的传感器。由于2-
氨基苯基部分的自由旋转,APQ在
乙腈中显示出非常弱的荧光。与
光气反应后,APQ转化为新的受限分子内运动产物APQU1。由于特定的环化反应,APQ表现出对
光气的明显荧光响应,斯托克斯位移(104 nm)大,即时响应(小于20 s),检测限低(0.16 ppm)。此外,制备了装载有APQ的测试条,并证明了其在检测
光气中的实用性。