A new rhodamine B-based "off-on" fluorescent chemosensor for Cu2+ in aqueous media

作者:Zhou, Yanmei*; Zhang, Junli; Zhou, Hua; Zhang, Qingyou; Ma, Tongsen; Niu, Jingyang
来源:Journal of Luminescence, 2012, 132(8): 1837-1841.
DOI:10.1016/j.jlumin.2012.03.016

摘要

A new fluorescent probe 1 (P1) for Cu2+ based on rhodamine B was designed and synthesized. P1 exhibits high sensitivity and selectivity for sensing Cu2+ and color changes from colorless to pink in aqueous media. Selective fluorescent enhancement of P1 was attributed to ring-opening from the spirolactam (nonfluorescent) to ring-opened amide (fluorescent). A chemosensor based on rhodamine B has a good potential application to the determination of Cu2+ in environmental and biological systems.