A smart chemosensor: Discriminative multidetection and various logic operations in aqueous solution at biological pH

Awad I Said; Nikolai I Georgiev; Vladimir B Bojinov

doi:10.1016/j.saa.2019.117304

A smart chemosensor: Discriminative multidetection and various logic operations in aqueous solution at biological pH

Spectrochim Acta A Mol Biomol Spectrosc. 2019 Dec 5:223:117304. doi: 10.1016/j.saa.2019.117304. Epub 2019 Jun 22.

Authors

Awad I Said¹, Nikolai I Georgiev², Vladimir B Bojinov³

Affiliations

¹ Department of Organic Synthesis, University of Chemical Technology and Metallurgy, 8 Kliment Ohridsky Str., 1756 Sofia, Bulgaria; Department of Chemistry, Faculty of Science, Assiut University, Assiut, Egypt.
² Department of Organic Synthesis, University of Chemical Technology and Metallurgy, 8 Kliment Ohridsky Str., 1756 Sofia, Bulgaria.
³ Department of Organic Synthesis, University of Chemical Technology and Metallurgy, 8 Kliment Ohridsky Str., 1756 Sofia, Bulgaria. Electronic address: vlbojin@uctm.edu.

PMID: 31255861
DOI: 10.1016/j.saa.2019.117304

Abstract

A novel rhodamine-pyrazole based molecular probe was designed and easily synthesized. The probe could to detect several analytes in aqueous solution at biological pH (HEPES, pH = 7.2). Several heavy metal cations, including Cu²⁺, Fe³⁺, Al³⁺, Hg²⁺ and Ni²⁺ were detected discriminately by the probe. Also, the novel compound exhibited a good sensory selectivity towards S₂O₅^2- by both absorption and emission spectra. Moreover, probe/Cu²⁺ complex could to detect several anions, including F^-, CN^-, S^2-, CH₃COO^-, CO₃^2- and NO₂^-. Furthermore, the probe exhibited a high potential to work as a molecular system able to perform a number of logical operations such as AND, NAND, NOR and INHIBIT logic gates.

Keywords: 1,3-Diphenylpyrazole; AND; Detection of metal cations and anions; Fluorescent probe; NAND; NOR and INHIBIT logic gates; Rhodamine 6G.