Single sensor for multiple analytes in different optical channel: Applying for multi-ion response modulation

Chunshuang Liang; Shimei Jiang

doi:10.1016/j.saa.2017.04.026

Single sensor for multiple analytes in different optical channel: Applying for multi-ion response modulation

Spectrochim Acta A Mol Biomol Spectrosc. 2017 Aug 5:183:267-274. doi: 10.1016/j.saa.2017.04.026. Epub 2017 Apr 18.

Authors

Chunshuang Liang¹, Shimei Jiang²

Affiliations

¹ State Key Laboratory of Supramolecular Structure and Materials, Jilin University, 2699 Qianjin Avenue, Changchun 130012, PR China.
² State Key Laboratory of Supramolecular Structure and Materials, Jilin University, 2699 Qianjin Avenue, Changchun 130012, PR China. Electronic address: smjiang@jlu.edu.cn.

PMID: 28456085
DOI: 10.1016/j.saa.2017.04.026

Abstract

A Schiff-base, (2,4-di-tert-butyl-6-((2-hydroxyphenyl-imino)-methyl)phenol) (L), has been improved to function as a simultaneous multi-ion probe in different optical channel. The probe changes from colorless to orangish upon being deprotonated by F^-, while the presence of Al³⁺ significantly enhances the fluorescence of the probe due to the inhibition of CN isomerization, cation-induced inhibition of excited-state intramolecular proton transfer (ESIPT), and chelation enhanced fluorescence (CHEF). Dual-channel "off-on" switching behavior resulted from the sequential input of F^- and Al³⁺, reflecting the balance of independent reactions of Al³⁺ and F^- with L and with one another. This sensing phenomenon realizes transformation between multiple states and beautifully mimics a "Write-Read-Erase-Read" logic circuit with two feedback loops.

Keywords: Aluminum ion; Dual-channel; Fluoride; Multi-state logic circuit; Multiple analytes; Reversible.