Naphthalimide-based fluorescent Zn2+ chemosensors showing PET effect according to their linker length in water
作者:Soon Young Kim、Jong-In Hong
DOI:10.1016/j.tetlet.2009.03.179
日期:2009.6
have developed naphthalimide-based fluorescent chemosensors that exhibit fluorescence enhancement upon binding Zn2+ ion in 10 mM HEPES buffer (pH 7.4) at 25 °C. The fluorescence enhancement was induced by a PET inhibition process in which electrontransfer from the nitrogen lone pair electrons of the Dpa unit to naphthalimide was blocked upon the binding of the sensor to Zn2+. The longer the linker length
我们已经开发出基于萘二甲酰亚胺的荧光化学传感器,该传感器在25°C下于10 mM HEPES缓冲液(pH 7.4)中结合Zn 2+离子后显示出荧光增强作用。通过PET抑制过程诱导荧光增强,在该过程中,当传感器与Zn 2+结合后,电子就从Dpa单元的氮孤对电子转移至萘二甲酰亚胺。 传感器的连接子长度越长(n = 1-3),PET效率就越低。间(传感器1,2,和3)检测,1示出了最高的选择性和灵敏度为锌2+比其他过渡金属离子,并在水中的碱金属离子。