Methacrylate-Functionalised Porphyrin for Photo-Polymerised Fluorescent Films in Pb(II) Ion Detection
DOI:
https://doi.org/10.11113/mjfas.v22n2.4737Keywords:
Porphyrins, functionalisation, sensor, thin film, quenching, fluorescence, luminescenceAbstract
Herein, 5,10,15,20-tetrakis(4-hydroxyphenyl)-21H,23H-porphine (TPP-(OH)4) was functionalised with methacrylate group to convert it to a crosslinker (TPP-M) which later was used in photo-polymerisation alongside acrylamide. TPP-M obtained was characterised using proton nuclear magnetic resonance (1H-NMR), Fourier-Transform infrared (FTIR), ultraviolet-visible (UV- Vis) and fluorescence spectroscopy. The ability of TPP-M to detect Pb(II) ions was tested, and the resulted spectrum showed the reduced fluorescence intensity upon addition of Pb(II) ions. Then, the TPP-M was made into a polymer film through photo-polymerisation using UV light as a light source and diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide (TPO) as a photo-initiator. The film obtained was tested for Pb(II) ion detection using fluorescence spectroscopy and showed reduced fluorescence intensities.
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