Application of a New Macrociclic-PVC Electrode to Potentiometric Studies of Cr(III) Ion and Its Computational studies
کد مقاله : 1025-PHYSCHEM20
محمدحسین فکری *، مریم درویش پور
مدرس دانشگاه آیت الله بروجردی
چکیده مقاله:
A new macrocyclic ligand as a neutral carrier in the construction of a new PVC membrane electrode selective to Cr(III) ion was prepared. The electrode exhibits a good potentiometric response for Cr(III) over a wide concentration range 1.0 × 10-4 to 1.0 × 10-1 M with a slope 20.4±0.5 mV/decade and low detection limit of 8.9 × 10-5 M. It has a fast response time ≤ 20s. The best performance was observed with the membrance having the PVC- ligand- acetophenone- oleic acid composition 6:1:7:1. The electrode assembly was also used as indicator electrode in the potentiometric titration of Cr(III) with EDTA. The structure of the ligand was also studied by HF calculations using a standard 6-31G* basis set and LanL2DZ.
کلیدواژه ها:
PVC membrane; Cr(III) ; sensor; potentiometry;New Macrociclic; HF, LanL2DZ
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