N-Phenyl-N'-(3-quinolinyl)urea ( 1)已被开发为一种基于质子转移机制的高选择性比色和比率荧光化学传感器氟离子。UV-vis 和荧光滴定,尤其是1 H 和19 F NMR 实验提供了机制的证据。该传感器 对氟化物给出了迄今为止报告的最大比率荧光响应 (R max /R min = 2620)。以H +为“回收试剂”,传感器可以可逆地“使用”和“回收”几个循环,响应能力只有轻微衰减。
Modification of ground and excited states of 3-phenylureidoquinoline by encapsulation in surfactant assemblies
作者:Debashis Panda、Anindya Datta
DOI:10.1016/j.cplett.2006.05.051
日期:2006.7
The interaction of the fluorescent probe 3-phenylureidoquinoline with surfactant assemblies has been investigated using fluorescence spectroscopic and computational techniques. The non-radiative deactivation rates are found to be suppressed in micelles. In the negatively charged SDS micelle, the cation is found to form, leading to a marked shift in fluorescence. This is explained by a consideration of the local pH and altered pK(a) of the fluorophore. In reverse micelle the gradual addition of water remarkably enhances the rate of non-radiative depopulation. (c) 2006 Elsevier B.V. All rights reserved.