Solvatochromic behavior of a pyrene-pyrimidine-based Schiff base and detection of heavy metal ions in aqueous media. Issue 8 (7th May 2021)

• Record Type: Journal Article
• Authors: Ghosh, Swadesh; Singharoy, Dipti; Konar, Saugata; Naskar, Jnan Prakash; Bhattacharya, Subhash Chandra
• Is Part Of: Journal of coordination chemistry. Volume 74:Issue 8(2021)
• Page Start: 1272
• Page End: 1283
• Publication Date: 2021-05-07
• Subjects: Synthesis -- solvent study -- mercury detection -- selectivity; Coordination compounds -- Periodicals; 541.2242
• DOI: 10.1080/00958972.2021.1897980
• Languages: English
• ISSNs: 0095-8972

Abstract

Abstract: The synthesis and solvatochromic behavior of pyrimidine based Schiff-base (PYPH) were studied to develop a fluorescent chemo sensor for the detection of Hg 2+ in aqueous solution. The characterization of PYPH was investigated on the basis of UV–vis, FTIR, 1 H-NMR and mass spectral data. PYPH displays selective fluorescent turn-off response to Hg 2+ in aqueous solution. The sensitivity and selectivity of PYPH toward Hg 2+ among different metal ions was examined by absorption, fluorescence, 1 H-NMR and mass spectral studies. Binding stoichiometry (2:1) has been confirmed by a Job's plot, HRMS spectral studies and 1 H-NMR analysis. A low detection limit was 4.2 × 10 −6 M for Hg 2+ . Ground state geometry of PYPH has been optimized using density functional theory (DFT). These results demonstrate that PYPH has promise to detect Hg 2+ ion in environmental analysis systems. Graphical Abstract: