Lipophilic Lanthanide Tris(β-diketonate) Complexes as an Ionophore for Cl- Anion-Selective Electrodes

摘要: A series of novel anion-selective electrodes were developed by incorporating lipophilic lanthanide tris(β-diketonates) into plasticized poly(vinyl chloride) membranes. The new exhibited high selectivity toward Cl- anion in the concentration range between 1.0 × 10-5 and 10-1 mol/L with near-Nernstian slopes practically low detection limits. They offered non-Hofmeister selectivity, interestingly discriminated from NO3-, ClO4-, other anions. Since employed confirmed to form 1:1 highly coordinated complexes anion, observed for was attributed characteristics coordination chemistry. All prepared sensors worked well at neutral pH quite short response time, <30 s, could be used longer than four months without any significant divergence performance.