Novel triazine-based colorimetric and fluorescent sensor for highly selective detection of Al3+

The complexation activity of NADO with various metal ions in an ethanolic solution is specifically studied by means of fluorescent spectra. The NADO exhibits a significant fluorescence enhancement at 469 nm in presence of Al3 þ due to the formation of a complex.
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Novel triazine-based colorimetric and fluorescent sensor for highly selective detection of Al3+ Journal of Science: Advanced Materials and Devices 4 (2019) 237e244 Contents lists available at ScienceDirect Journal of Science: Advanced Materials and Devices journal homepage: www.elsevier.com/locate/jsamdOriginal ArticleNovel triazine-based colorimetric and fluorescent sensor for highlyselective detection of Al3þJ. Jone Celestina a, L. Alphonse a, P. Tharmaraj a, *, C.D. Sheela ba PG and Research Department of Chemistry, Thiagarajar College, Madurai 625009, Tamilnadu, Indiab PG and Research Department of Chemistry, The American College, Madurai 625002, Tamilnadu, Indiaa r t i c l e i n f o a b s t r a c tArticle history: This paper deals with a new fluorescent assay of Al3þ ions with (2,20 -(6-((4-nitrophenyl)amino)-1,3,5-Received 31 January 2019 triazine-2,4-diyl) bis(hydrazine-2-yl-1-ylidene)) bis(indolin-3-one) (NADO) containing triazine moietyReceived in revised form developed over other commonly coexisting metal ions. The complexation activity of NADO with various26 April 2019 metal ions in an ethanolic solution is specifically studied by means of fluorescent spectra. The NADOAccepted 8 May 2019Available online 16 May 2019 exhibits a significant fluorescence enhancement at 469 nm in presence of Al3þ due to the formation of a complex. Under an optimized condition the detection limit is found to be 0.09 mM. As the concentration of Al3þ is increased, the fluorescence intensity gradually increases due to the formation of the complex.Keywords:Fluorescent sensor The 1:1 binding stoichiometry between Al3þ and NADO is confirmed by the Jobs plot and the HR-LCMSColorimetric mass spectrum of the metal complex.Aluminium ion © 2019 Publishing services by Elsevier B.V. on behalf of Vietnam National University, Hanoi. This is anTriazine open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).Schiff base1. Introduction selectivity and the capacity for rapid, real-time monitoring compared to other methods [3,4]. Schiff base acts as a good op- Aluminum being the third most abundant element has its tical and fluorescent sensor due to its photophysical properties.widespread use in light alloy, textiles and in treatment of water. Triazine Schiff base, formed with active carbonyls and amines,Al3þ remains in blood and tissues for a very long time before it is will enhance the property of fluorescence on complexation. It hasexcreted in the urine. World Health Organization holds the view been considered in various fields of chemistry due to its specificthat the average daily human intake of aluminum is about 3e10 mg. properties like co-ordination ability which makes them appli-Human body tolerates an uptake up to 7 mg/kg of the body weight cable as a fluorescent sensor in catalysts and in biological fields.per week. Aluminum in excess would lead to environmental In view of these facts, we designed the receptor as the targetcontamination and could be toxic to human health since it impedes sensor that could strongly bind the metal ions through Schiff basecalcium metabolism, thereby causing Osteomalacia, influences the moiety [5,6]. In the present study, a functionalized triazine de-ingestion of iron in blood and also decreases the liver and kidney rivative, as a fluorescent Al3þ sensor, is developed with a lowestfunctions. Excess accumulation of Al3þ leads to impairment of the detection limit of 0.09 mM. Our results exhibit an enhancedcentral nervous system, which is associated with the pathology of fluorescence emission in ethanolic solution upon the addition ofdementia, anemia, Parkinsons disease, Alzheimers disease and Al3þ ions [6].dialysis [1,2]. It is, therefore, desirable to detect and sense Al3þ ions and to 2. Experimentalcontrol their impact in biosphere. In previous reports, Zheng-qiang Li and co-workers have reported several detection methods 2.1. Materialsfor Al3þ ions among which fluorescence detection offers severaladvantages such as high sensitivity, a facile analysis, an intrinsic All the needed chemicals were purchased from sigma Aldrich India and were used without further purification. The metal chlo- * Corresponding author. ride salts were purchas ...