期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 242, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2020.118749
关键词
Triaminoguaiiidine-pyrrole based sensor; Colorimetric and fluorometric sensor; PPi detection; IMPLICATION logic gate; Smartphone application
类别
资金
- SERB, New Delhi, India [YSS/2015/000037]
- UGC, New Delhi [F.4-5 (94-FRP)/2015(BSR)]
- Department of Science and Technology (DST), NewDelhi [SR/PURSE Phase 2/17 G]
In this work, new ethyl(E)-2-cyano-3-(1H-pyrrol-2-yl)acrylate appended C-3 -symmetric star-shape triaminoguanidine based Schiff base (LH3) was designed and synthesized from simple synthons. New probe, LH3 was completely analyzed by H-1 NMR. C-13 NMR and mass spectrum. In the present probe LH3, effective pi-conjugated ethyl(E)-2-cyano-aciylate unit was introduced on the periphery of the pyrrole-triaminoquanidine conjugates by using carefully chosen building units. The probe LH3 shows high selectivity and sensitivity towards Zn2+- ion via colorimetric and fluorometric changes. The yellowish orange color of LH3 solution turned to wine red color upon addition of Zn2+ solution, along with red shifted absorption maxima from 450 nm to 550 nm, this indicates the formation of LH3-Zn2+ species. Job's plot and mass spectrum analysis confirms the formation of 1:3 stoichiometric complex between the LH3 and Zn2+ ions. Further this ensemble shows selective detection towards PPi anion over the other anions based on displacement metal ion approach. Hence, reversible colorimetric/emission response of LH3 towards Zn2+ and PPi ions via on-off-on manner could allow the construction of IMPLICATION logic gate functions. The practical efficacy of the probe LH3 was established by utilization of the probe for the detection of Zn2+ ions in real water sample analysis. Further, the significant noticeable colorimetric changes of the probe LH3 upon addition of Zn2+ ion have been successfully integrated with a smartphone app RGB color value to construct a real-time analysis of Zn2+ ions. (C) 2020 Elsevier B.V. All rights reserved.
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