Boron-doped graphitic carbon nitride as a novel fluorescent probe for mercury(ii) and iron(iii): a circuit logic gate mimic. (15th July 2019)

• Record Type: Journal Article
• Authors: Boorboor Azimi, Elham; Badiei, Alireza; Jafari, Maryam; Banitalebi Dehkordi, Ali; Ghasemi, Jahan B.; Mohammadi Ziarani, Ghodsi
• Is Part Of: New journal of chemistry. Volume 43:Number 30(2019)
• Page Start: 12087
• Page End: 12093
• Publication Date: 2019-07-15
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c9nj03127h
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : Boron-g-C3 N4 was applied as a novel practical fluorescent probe to detect mercury and ferric ions in real samples. Abstract : The detection and determination of metal cations in different real samples are important matters in various fields of experimental science. Herein, graphitic carbon nitride (g-C3 N4 ) doped with boron was facilely prepared and shown to be a practical fluorescent probe for the detection and measurement of mercury and ferric ions in real samples. The nanomaterial was characterized by XRD, FT-IR, SEM, elemental mapping, and N2 adsorption–desorption techniques. Fluorescence of the boron-doped g-C3 N4, with a 280/348 nm excitation/emission maximum, is quenched by mercury and ferric ions. The quenching effect was used to design assays with detection limits of 185 nM (for Hg 2+ ) and 154 nM (for Fe 3+ ) and worked in the pH range 7–10, in aqueous solutions. The mechanism of quenching was investigated by using the Stern–Volmer equation. The probe was used to determine the Fe 3+ and Hg 2+ levels in spinach and tuna fish, respectively, and the results were compared with ICP-OES. Quenching by Fe 3+ can be reversed by sodium hexametaphosphate (SHMP), as a masking agent for Fe 3+ . Therefore, a circuit logic system was developed with Fe 3+, Hg 2+, and SHMP as inputs, and the quenched signal as the output.