A Turn-on and Reversible Fluorescence Sensor for Zinc Ion Based on 4,5-Diazafluorene Schiff Base

Hui Li; ShuJiang Zhang; ChenLiang Gong; JianZhi Wang; Feng Wang

doi:10.1007/s10895-016-1877-1

A Turn-on and Reversible Fluorescence Sensor for Zinc Ion Based on 4,5-Diazafluorene Schiff Base

J Fluoresc. 2016 Sep;26(5):1555-61. doi: 10.1007/s10895-016-1877-1. Epub 2016 Jul 18.

Authors

Hui Li^{1

2}, ShuJiang Zhang³, ChenLiang Gong², JianZhi Wang², Feng Wang⁴

Affiliations

¹ Key Laboratory for Green Chemical Process of Ministry of Education, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan, 430073, People's Republic of China.
² College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, People's Republic of China.
³ College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, People's Republic of China. zhangshj@lzu.edu.cn.
⁴ Key Laboratory for Green Chemical Process of Ministry of Education, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan, 430073, People's Republic of China. psfwang@wit.edu.cn.

PMID: 27430628
DOI: 10.1007/s10895-016-1877-1

Abstract

A new 4,5-diazafluorene-based fluorescent chemosensor has been synthesized by Schiff base condensation of 9,9-bis(3,5-dimethyl-4-aminophenyl)-4,5-diazafluorene with salicylaldehyde. The interaction of Schiff base with different metal ions has been studied over photofluorescent spectra. The results showed that Schiff base exhibited 194-fold enhancements in fluorescence at 465 nm after Zn(2+) ions. Such fluorescent responses could be detected by naked eye under UV-lamp. The complex solution (L-Zn(2+)) exhibited reversibility with EDTA.

Keywords: Fluorescent sensor; Schiff base; Turn-on; Zn2+ ion.