Ionic Organic Network-based C3-symmetric@Triazine core as a selective Hg +2 sensor.
Maha A AlshubramyM M AlamKhalid A AlamryAbdullah M AsiriMahmoud Ali HusseinMohammed M RahmanPublished in: Designed monomers and polymers (2024)
The C3-symmetry ionic polymer PPyTri has been designed with multi-walled carbon nanotubes (MWCNTs) or graphene nanoplatelets (GNPs) and studied as an ultrasensitive electrochemical sensor for trace Hg(II) detection. The synthesis approach incorporated attaching three pyridinium cationic components with chloride anions to the triazine core. The precursors, BPy, were synthesized using a condensation process involving 4-pyridine carboxaldehyde and focused nicotinic hydrazide. The polymer PPyTri was further modified with either MWCNTs or GNPs. The resulting ionic polymer PPyTri and its fabricated nanocomposites were characterized using infrared (IR), nuclear magnetic resonance (NMR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and powder X-ray diffraction (XRD). The analysis revealed that both the polymer and its nanocomposites have semi-crystalline structures. The electroactivity of the designed nanocomposites toward Hg + 2 ions revealed that among the nanocomposites and bare copolymer, the glassy carbon electrode (GCE) adapted with the PPyTri GNPs-5% exhibited the greatest current response over a wide range of Hg + 2 concentrations. The nanocomposite-modified electrode presented an excellent sensitivity of 83.33 µAµM - 1 cm - 2, a low detection limit of 0.033 nM, and a linear dynamic range of 0.1 nM to 0.01 mM (R2 = 0.9945).
Keyphrases
- electron microscopy
- walled carbon nanotubes
- carbon nanotubes
- solid state
- reduced graphene oxide
- ionic liquid
- magnetic resonance
- aqueous solution
- gold nanoparticles
- label free
- fluorescent probe
- high resolution
- living cells
- quantum dots
- photodynamic therapy
- room temperature
- real time pcr
- loop mediated isothermal amplification
- solid phase extraction
- magnetic resonance imaging
- molecularly imprinted
- single molecule
- risk assessment
- mass spectrometry