Development of paper-based chemosensor for the detection of mercury ions using mono- and tetra-sulfur bearing phenanthridines. (23rd April 2018)

• Record Type: Journal Article
• Authors: Ponram, Marimuthu; Balijapalli, Umamahesh; Sambath, Baskaran; Iyer, Sathiyanarayanan Kulathu; B, Venkatachalapathy; Cingaram, Ravichandran; Natesan Sundaramurthy, Karthikeyan
• Is Part Of: New journal of chemistry. Volume 42:Number 11(2018)
• Page Start: 8530
• Page End: 8536
• Publication Date: 2018-04-23
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c8nj00760h
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : A new sulfur-bearing phenanthridine probes were synthesized and examined for their cation recognition abilities towards different cations in aqueous ACN solution and paper strips. Abstract : A new and simple fluorescent probe bearing mono-sulfur (1 ) and tetra-sulfur (2 ) tetrahydrodibenzo phenanthridine derivatives were synthesized and examined for their cation recognition abilities towards different cations in aqueous acetonitrile solution and paper strips. Both the probes showed high selectivity and sensitivity with strong affinity towards Hg 2+ ions over other cations, such as Cu 2+, Ca 2+, Co 2+, Cd 2+, Pb 2+, Zn 2+, Ni 2+, Mg 2+, Mn 2+, Al 3+, Fe 3+, La 3+, Ag +, K +, Na + and Li + . The binding stoichiometry ratios of1 –Hg 2+ and2 –Hg 2+ are recognized as 1 : 1 according to the UV-Vis absorption spectra, fluorescence measurements and computational (DFT) studies, and the possible binding mode of these receptors with Hg 2+ is also proposed. The limit of detection with Hg 2+ cation was found to be as low as 0.91 nM and 0.041 nM for probes1 and2, respectively. The results clearly indicate that the synthesised tetrahydrodibenzo phenanthridine derivatives1 and2 could be used as excellent chemosensors for Hg 2+ detection in biological and environmental samples.