A New Azo-Schiff Base Dual-mode Chemosensor: Colorimetric Detection of Cobalt Ions and Fluorometric Detection of Aluminum Ions in Aqueous Ethanol Solution

• DOI: 10.1007/s10895-022-03099-7
• Publication Date: 2022-11-30T09:05:41Z
• Authors: Reza Azadbakht; Naemeh Chidan; Saeid Menati; Mostafa Koolivand
• Keywords: Spectrometry, Fluorescence; Ethanol; Cations; Colorimetry; Cobalt; 01 natural sciences; Schiff Bases; Aluminum; 0104 chemical sciences

Abstract A new chemosensor H2L has been designed and synthesized based on an Azo-Schiff base ligand for the selective and sensitive sensing of Co2+ and Al3+ ions. The H2L as fluorescence chemosensor exhibits a linear response toward Al3+ ions in the concentration range of 1.91 × 10− 8 M to 4.8 × 10− 6 M with a limit of detection of 1.91 × 10− 8 M. The chemosensor also displayed high colorimetric sensitivity for Co2+. Fluorescence switch based on the control of EDTA and Al3+ proved H2L could act as a reversible chemosensor. The molecular structure of [NiL] complex has been determined by X-ray crystallography.