• 文献标题:   Axially coordinated tin porphyrins anchored graphene oxide hybrid composites as productive catalyst for catalytic conversion of 4-nitrophenol to 4-aminophenol
  • 文献类型:   Article
  • 作  者:   YASMEEN R, SINGHAAL R, BAJJU GD, SHEIKH HN
  • 作者关键词:   catalytic reduction, composite, axially ligated tin porphyrin, graphene oxide, 4amino salicylic acid
  • 出版物名称:   JOURNAL OF CHEMICAL SCIENCES
  • ISSN:   0974-3626 EI 0973-7103
  • 通讯作者地址:  
  • 被引频次:   0
  • DOI:   10.1007/s12039-022-02105-6
  • 出版年:   2022

▎ 摘  要

Axially ligated tin porphyrins were synthesized by proceeding through the preparation of free base 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 of axial ligand (4-amino salicylic acid) coordinated to tin porphyrins. H-1 NMR spectroscopy was used to detect the successful formation of free-base porphyrins and their corresponding metal-linked and axially ligated tin porphyrins. 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.