ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

A quinoline-based Schiff base for significant fluorescent “turn-on” and absorbance-ratiometric detection of Al³⁺

Yu-Qing Ma, Xue-Jiao Sun, Ming-Qiang Li, Shuang Zeng, Zhi-Yong Xing, and Jin-Long Li

Northeast Agricultural University, Harbin, People’s Republic of China

E-mail: zyxing@neau.edu.cn

Abstract: A novel quinoline-based Schiff base fluorescent sensor BQPA had been synthesized and characterized by common spectroscopic methods. It showed highly sensitive fluorescent enhancement (300-fold) and ratiometric absorbance for the determination of Al³⁺ with low detection limits of 31 nM in CH₃CH₂OH/H₂O (1: 9, v/v) solution. The stoichiometry of the BQPA–Al³⁺ complex was 1:1, determined by Job plots curve and further confirmed by HRMS, ¹H NMR titration and FT-IR spectrum. Moreover, the potential application of BQPA in the detection of Al³⁺ was estimated in real water samples.

Keywords: Quinoline ; Schiff base ; Fluorescence ; Ratiometric ; Al³⁺ 

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-019-00698-w

Chemical Papers 73 (6) 1469–1479 (2019)