• Synthesis, characterization and photoluminescence properties of tetra(aminophenyl) porphyrin covalently linked to multi-walled carbon nanotubes

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      https://www.ias.ac.in/article/fulltext/jcsc/129/06/0699-0706

    • Keywords

       

      MWCNT-TAP; photoluminescence; solvatochromism; fluorescence quenching.

    • Abstract

       

      Synthesis of a new nano hybrid of 5,10,15,20-mesotetra(4-aminophenyl) porphyrin (TAP) functionalized with multi-walled carbon nanotubes (MWCNTs) through an amide linkage is reported for the first time. ThisMWCNT-TAP hybrid was characterized by Raman, Fourier transform infrared (FT-IR), Transmissionelectron microscopy (TEM), Thermogravimetric analysis (TGA), absorption and emission spectroscopy. TGA analysis reveals that there is a∼60% weight loss when heated from 150–750◦C, which is attributed to the amount of TAP molecules that were attached to MWCNTs. Electronic properties of MWCNTs were improved in the hybrid compared to raw MWCNTs as evidenced by Raman spectra. The absorption and emission spectra of TAP and nano-hybrid indicate strong positive solvatochromism with increasing solvent polarity. Fluorescencequenching of TAP in different solvents were observed in the emission spectra in the MWCNT-TAP hybrid, indicating that covalent functionalization facilitated effective energy or electron transfer from porphyrin moiety to the MWCNT.

    • Author Affiliations

       

      G PRABHAVATHI1 M ARJUN2 R YAMUNA2

      1. Research and Development Centre, Bharathiar University, Coimbatore, Tamil Nadu 641 046, India
      2. Department of Chemical Engineering and Material Science, Department of Sciences, Center of Excellence in Advanced Materials and Green Technologies (CoE-AMGT), Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Amrita University, Coimbatore, Tamil Nadu 641 112, India
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  • Journal of Chemical Sciences | News

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