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      https://www.ias.ac.in/article/fulltext/jcsc/134/0111

    • Keywords

       

      Catalytic reduction; composites; axially ligated tin porphyrins; graphene oxide; 4-amino salicylic acid.

    • Abstract

       

      Axially ligated tin porphyrins were synthesized by proceeding through the preparation of freebase and metal incorporated porphyrins. Axially ligated tin porphyrins were anchored with graphene oxide via amide linkage among the carboxylic functional moieties of graphene oxide (GO) and an amino group ofaxial ligand (4-amino salicylic acid) coordinated to tin porphyrins. 1H NMR spectroscopy was used to detectthe successful formation of free-base porphyrins and their corresponding metal-linked and axially ligated tinporphyrins. In order to probe the interactions between GO and tin porphyrins, the nanohybrids were carefully characterized by using various analytical techniques like Powder X-Ray diffraction (P-XRD), Fourier transform infrared (FT-IR), UV–Visible spectroscopy (UV-Vis) and Fluorescence spectroscopy. These hybrid composites were also characterized by Powder-XRD analysis. The Ground-state absorption and steady-state luminescence measurement illustrated the presence of significant covalent interactions along with effective photoelectrons and excited energy exchange between the tin porphyrin and GO structure. The catalytic activity of resulting hybrids (GO-Sn-Porph 1) and (GO-Sn-Porph 2) were carefully investigated by using a UV-visible Spectrophotometer manifesting the effective reduction of 4-nitrophenol into 4-aminophenol. The mechanism for the catalytic activity of the synthesized nanocatalysts has been discussed.

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    • Author Affiliations

       

      REHANA YASMEEN1 RICHA SINGHAAL1 GAURI DEVI BAJJU1 HAQ NAWAZ SHEIKH1

      1. Department of Chemistry, University of Jammu, Baba Sahib Ambedkar Road, Jammu 180006, India
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    • Supplementary Material

       
  • Journal of Chemical Sciences | News

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