Polymeric Lead(II)-selective Electrode Based on N,N'-Bis-thiophen-2-ylmethylene-pyridine-2,6-diamine as an Ion Carrier

Abstract

Polymeric electrodes for lead ion based on N,N'-bis-thiophen-2-ylmethylene-pyridine-2,6-diamine as an ion carrier were prepared. The membrane electrode (m-3) containing o-NPOE as a plasticizer and 50 mol% additive of ionophore gives an excellent Nernstian response (29.59 mV/decade) and the limit of detection of -log a (M) = 5.74 to Pb 2+ in Pb(NO3)2 solution at room temperature. The prepared electrode provided good sensitivity and outstanding selectivity and response for Pb 2+ over a wide variety of other metal ions in pH 7.0 buffer solutions. The good sensitivity and selectivity towards lead ion are attributed to the strong complexation of lead ion to N,N'-bis-thiophen-2-ylmethylene-pyridine-2,6-diamine which has geometrically the proper cavity to coordinate to the ligand.

Synthesis and characterization of new Schiff base derived from 2-amino-5-(substituted phenyl) thiadiazole, substituted aromatic aldehyde and acetyl acetone

“…It is observed that C21H19N3O2S and C21H18N3OSCl ligands are more active against the fungal and bacterial strains A. Nigar and S. aureus as compare to other fungal and bacterial strains. Other ligands are moderately active against all fungal and bacterial strains 36,37 Antibacterial activities are shown in Table 2.…”