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dc.contributor.authorChini M.K.-
dc.contributor.authorKumar V.-
dc.contributor.authorMaiti B.-
dc.contributor.authorDe P.-
dc.contributor.authorSatapathi, Soumitra-
dc.date.accessioned2020-10-15T12:34:27Z-
dc.date.available2020-10-15T12:34:27Z-
dc.date.issued2019-
dc.identifier.citationPolymer Testing (2019), 79(): --
dc.identifier.issn1429418-
dc.identifier.urihttps://doi.org/10.1016/j.polymertesting.2019.105997-
dc.identifier.urihttp://repository.iitr.ac.in/handle/123456789/13452-
dc.description.abstractHere we report, a multimodal sensing platform for sensitive and selective detection of heavy metal Lead (Pb+2) and organic dye (Methylene Blue) employing a novel FRET pair between a fluorescent polymer and a small molecule. The FRET pair consists of the highly fluorescent dansyl tagged copolymer P(MMA-co-Dansyl-Ala-HEMA) (DCP) and small molecule diketopyrrolopyrrole (DPP). The overlap integral of the FRET pair is calculated to be 1.14 × 1016 nm4/(M*cm) and energy transfer efficiency is determined to be 25%. The fluorescence intensity of the studied FRET pair has been found to be quenched (“Turn Off”) and enhanced (“Turn On”) in the presence of methylene blue (MB) and lead (Pb+2) respectively. The FRET pair shows a strong affinity for Pb+2 ions with very low detection limit (LOD) (27.8 ppm). High KSV (3.9 × 104 M−1) for MB sensing with LOD value 295 ppb indicates enhanced photo-induced electron transfer from FRET pair to MB. The metal-induced modulation of the self-assembled polymer-small molecule-Pb complex in the solution lead to the photoluminescence enhancement in the presence of Pb+2 and the dynamic quenching is established as the fluorescence Turn-off mechanism in the presence of MB dye. Our multimodal FRET sensing probe offer a common platform for the selective detection of a broad range of toxic pollutants which opens up its possibility of use in field applications. © 2019 Elsevier Ltd-
dc.language.isoen_US-
dc.publisherElsevier Ltd-
dc.relation.ispartofPolymer Testing-
dc.subjectDansyl tagged copolymer-
dc.subjectDiketopyrrolopyrrole-
dc.subjectMethylene Blue-
dc.subjectStern-Volmer constant-
dc.titleA dual “Turn-on/Turn-off” “FRET” sensor for highly sensitive and selective detection of lead and methylene blue based on fluorescent dansyl tagged copolymer and small molecule diketopyrrolopyrrole-
dc.typeArticle-
dc.scopusid57190120798-
dc.scopusid57195978673-
dc.scopusid57197982652-
dc.scopusid7101660872-
dc.scopusid36610769900-
dc.affiliationChini, M.K., Department of Physics, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India-
dc.affiliationKumar, V., Department of Physics, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India-
dc.affiliationMaiti, B., Polymer Research Center, Department of Chemical Science, Indian Institute of Science Education and Research Kolkata, Mohanpur, 741246, India-
dc.affiliationDe, P., Polymer Research Center, Department of Chemical Science, Indian Institute of Science Education and Research Kolkata, Mohanpur, 741246, India-
dc.affiliationSatapathi, S., Department of Physics, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India-
dc.description.fundingThis work is supported by SERB Young Scientist Award [Grant No: YSS/2015/000061 ] and Department of Science &Technology [Grant No: DST/TM/WTI/2K16/50 ].-
dc.description.correspondingauthorSatapathi, S.; Department of Physics, Indian Institute of Technology RoorkeeIndia; email: ssphf.fph@iitr.ac.in-
Appears in Collections:Journal Publications [PH]

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