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      Dual colorimetric sensing of ascorbic acid and thyroxine using Ag–EGCG–CTAB via a DFT approach†

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      RSC Advances
      The Royal Society of Chemistry

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          Abstract

          In this work, a colorimetric approach for the detection of ascorbic acid (AA) and thyroxine (TH) was developed by synthesizing cost-effective silver nanoparticles (AgNPs) decorated with epigallocatechin gallate (EGCG) and CTAB. EGCG is the major bioactive chemical constituent that played a significant role in this study. The environment around the nanoparticle (NP) was controlled by adding CTAB surfactants. The synthesized NPs were characterized by different advanced techniques including XRD, XPS, SEM, and TEM. UV-visible spectra were thoroughly analyzed for sensing of AA and TH and the colour change of the solution can be visually monitored. The change in the localized surface plasmon resonance (LSPR) properties was used as an asset for the detection of AA and TH. A good linear relationship was obtained in both the sensing schemes with a limit of detection (LoD) of 0.67 μM and 0.33 μM for AA and TH respectively. Furthermore, the nanoparticles (NP) were implemented for real-sample analysis (pharmaceutical tablets). A cost-effective filter paper strip-based method coupled with smartphone scanning sensing was developed for the detection of AA. The interaction of AA and TH with the probe was depicted by a density functional theory (DFT) analysis. The synthesized NPs show tremendous selectivity towards AA and TH and excellent potential for practical applications.

          Abstract

          In this work, a colorimetric approach for the detection of ascorbic acid and thyroxine was developed by synthesizing cost-effective silver nanoparticles (AgNPs) decorated with epigallocatechin gallate (EGCG) and CTAB.

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          Author and article information

          Journal
          RSC Adv
          RSC Adv
          RA
          RSCACL
          RSC Advances
          The Royal Society of Chemistry
          2046-2069
          16 November 2021
          10 November 2021
          16 November 2021
          : 11
          : 58
          : 36698-36706
          Affiliations
          [a] Natural Product Chemistry Section, CSIR-North East Institute of Science and Technology, Branch Itanagar Arunachal Pradesh-791110 India c.tamuly@ 123456gmail.com
          [b] Academy of Scientific and Innovative Research (AcSIR) Ghaziabad-201002 India
          [c] Department of Chemistry, Cotton University Guwahati Assam-781001 India
          [d] Material Science & Technology Division, CSIR-North East Institute of Science & Technology Jorhat Assam-785006 India
          Author information
          https://orcid.org/0000-0002-1688-8599
          https://orcid.org/0000-0001-8206-0071
          https://orcid.org/0000-0003-4370-8108
          https://orcid.org/0000-0002-6317-7933
          https://orcid.org/0000-0001-7396-2460
          Article
          d1ra04204a
          10.1039/d1ra04204a
          9043532
          35494345
          065deabe-5621-46db-a689-0c4f362fe9c7
          This journal is © The Royal Society of Chemistry
          History
          : 31 May 2021
          : 19 October 2021
          Page count
          Pages: 9
          Funding
          Funded by: National Medicinal Plants Board, Ministry of AYUSH, Government of India, doi 10.13039/501100011700;
          Award ID: Z.180/7/187/CSS/R&D/Aru.01/2018-19-NMPB-IV.A
          Funded by: Council of Scientific and Industrial Research, India, doi 10.13039/501100001412;
          Award ID: Unassigned
          Funded by: Department of Science and Technology, Ministry of Science and Technology, India, doi 10.13039/501100001409;
          Award ID: SEED/TITE/020/2017
          Award ID: DST/SEED/TSP/STI/2020/266
          Funded by: Department of Biotechnology, Ministry of Science and Technology, India, doi 10.13039/501100001407;
          Award ID: BT/PR24712/NER/95/828/2017
          Categories
          Chemistry
          Custom metadata
          Paginated Article

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