A benzo-15-crown-5-modifying ratiometric-absorption and fluorescent OFF-ON chemosensor for Cu2+

作者：Chen, Yuting^*; Wang, Xinxin; Wang, Kaili^*; Zhang, Xiuling

来源：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy , 2016, 161: 144-149.

DOI：10.1016/j.saa.2016.02.041

• Chemosensor
• Benzo-15-crown-5
• Ratiometric-absorption
• Isomerization
• Fluorescence enhancement

One new benzo-15-crown-5-modifying fluorene Schiff base (FBC), together with the C=N-linked fluorene-3,4-dimethoxybenzene (FBDMO) and fluorene-benzene (FB) references, has been designed and facilely synthesized. The binding of Cu2+ with nitrogen atom of C=N moiety in these three compounds can inhibit the photo-induced electronic transition process and induce the ratiometric-absorption and fluorescent OFF-ON response to Cu2+. Whereas the employment of benzo-15-crown-5 moiety in FBC as additional binding platform for Cu2+ not only amplifies the fluorescent enhancement of FBC via preventing the isomerization of C=N moiety, but also endows this compound high selectivity and rapid response towards Cu2+ over the references FB and FBDMO. These results render FBC highly sensitive ratiometric-absorption and fluorescent OFF-ON detecting potential for Cu2+ with the detection limit of 3.91 x 10(-6) M.

• 出版日期2016-5-15
• 单位北京市环境保护科学研究院; 德州学院; 山东大学