AIE active turn-off fluorescent probe for the detection of Cu2+ ions

Mehboobali Pannipara; Abdullah G Al-Sehemi; Abul Kalam; Abdullah M Asiri; Muhammad Nadeem Arshad

doi:10.1016/j.saa.2017.04.045

AIE active turn-off fluorescent probe for the detection of Cu²⁺ ions

Spectrochim Acta A Mol Biomol Spectrosc. 2017 Aug 5:183:84-89. doi: 10.1016/j.saa.2017.04.045. Epub 2017 Apr 20.

Authors

Mehboobali Pannipara¹, Abdullah G Al-Sehemi², Abul Kalam², Abdullah M Asiri³, Muhammad Nadeem Arshad³

Affiliations

¹ Research Center for Advanced Materials Science (RCAMS), King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia. Electronic address: mpannipara@kku.edu.sa.
² Research Center for Advanced Materials Science (RCAMS), King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia; Department of Chemistry, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia.
³ Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia; Center of Excellence for Advanced Materials Research, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia.

PMID: 28437689
DOI: 10.1016/j.saa.2017.04.045

Abstract

A novel AIE active Schiff base compound (receptor 1) has been designed, synthesized and characterized spectroscopically. Receptor 1 show weak emission in solution state but emit strongly in solid state. The investigation on the AIE behavior of receptor 1 using solvent-non-solvent (THF-Water) interaction reveals a maximum PL intensity on reaching the water fraction 90% (fw=90) due to nanoaggregation. Furthermore, demonstration of metal ion sensing application of receptor 1 unravel that it could act as selective and sensitive sensor for Cu²⁺ ions in aqueous solution via fluorescence "turn-off" manner. The quenching behavior of receptor 1 in presence of Cu²⁺ ions were evaluated using Stern-Volmer plot.

Keywords: Aggregation-induced emission; Fluorescent probe; Schiff base, Cu(2+).