title: New thiocyanate potentiometric sensors based on sulfadimidine metal complexes: experimental and theoretical studies.
abstract: Three sulfadimidine metal complexes (M=Fe(III), Cu(II), and Ag(I)) were prepared, characterized, and examined as neutral carriers for the determination of SCN(-) using modified carbon paste electrode. These sensors were successfully applied in the pure samples, and biological fluids. The electrode mechanism was investigated by UV-vis and FT IR. The experimental studies were complemented by quantum chemical calculations at DFT/B3LYP level of theory. The best performance was observed for Cu(II) electrode (C) containing 7.0% complex, 53.0% o-nitrophenyloctyl ether, 37.0% graphite and 3.0% cetylpyridinium chloride, and also for Fe(III)-electrode (A) having 6.0% complex, 52.0% o-nitro phenyloctyl ether, 40.5% graphite and 2.5% cetylpyridinium chloride.
authors.affiliation: Chemistry Department, Faculty of Science, Cairo University, Gamma Street, Giza, Cairo 12613, Egypt. Electronic address: olashehab_chem@yahoo.com.
authors.forename: Ola R
authors.initials: OR
authors.lastname: Shehab
authors.affiliation: Chemistry Department, Faculty of Science, Cairo University, Gamma Street, Giza, Cairo 12613, Egypt.
authors.forename: Ahmed M
authors.initials: AM
authors.lastname: Mansour
mesh_terms: D015374:Biosensing Techniques / Q000379:methods; D056831:Coordination Complexes / Q000737:chemistry*; D004566:Electrodes; D006801:Humans; D057230:Limit of Detection; D008958:Models, Molecular; D011199:Potentiometry / Q000379:methods*; D012463:Saliva / Q000737:chemistry; D013418:Sulfamethazine / Q000737:chemistry*; D013861:Thiocyanates / Q000032:analysis* / Q000652:urine; D062065:Wastewater / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D056831:Coordination Complexes; D013418:Sulfamethazine; D013861:Thiocyanates; D062065:Wastewater; D014874:Water Pollutants, Chemical; C031760:thiocyanate
keywords: Complexes; DFT; Modified carbon paste; Potentiometry; Sulfadimidine; Thiocyanate