2011
DOI: 10.1021/je101329d
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Complex Formation of the Cerium(IV) Ion with Glycyl-Glycine at Different Ionic Strengths

Abstract: The protonation equilibria of glycyl-glycine and its complex formation with the cerium(IV) ion in aqueous solution were studied over a wide pH range (2 to 12) using a combination of potentiometric and spectrophotometric methods at constant temperature (25 °C) and different ionic strengths [(0.02, 0.05, 0.10, 0.15, 0.30, 0.50, 0.70, and 1.00) mol 3 dm À3 sodium perchlorate]. Least-squares regression calculations are consistent with the formation of the CeL 3þ and CeHL 4þ species for the studied system, where L … Show more

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Cited by 8 publications
(2 citation statements)
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“…Of the ions tested, Zn 2+ and Pb 2+ are considered intermediate (borderline) acids, while Ce 3+ , Ce 4+ , and Ga 3+ ions are hard acids [ 31 , 34 ]. Cerium ions have already been shown to form complexes with amino acids and dipeptides [ 35 , 36 ]. Therefore, we first determined whether Ce 3+ , Ce 4+ , and Ga 3+ ions interacted with the synthetic peptide substrates used in the study or otherwise interfered with the kinetic measurements.…”
Section: Resultsmentioning
confidence: 99%
“…Of the ions tested, Zn 2+ and Pb 2+ are considered intermediate (borderline) acids, while Ce 3+ , Ce 4+ , and Ga 3+ ions are hard acids [ 31 , 34 ]. Cerium ions have already been shown to form complexes with amino acids and dipeptides [ 35 , 36 ]. Therefore, we first determined whether Ce 3+ , Ce 4+ , and Ga 3+ ions interacted with the synthetic peptide substrates used in the study or otherwise interfered with the kinetic measurements.…”
Section: Resultsmentioning
confidence: 99%
“…4 Ce(III) has similar chemical properties with radioactive elements such as Am(III) and Cm(III). 5,6 Among the conventional procedures for water treatment against heavy metal ions and nuclear waste, the adsorption technique is one of the most important methods and has been extensively used because of its high efficiency, lower operation cost, simple operation process, and large compatibility. 7 Therefore, the search and design of a novel adsorbent is a good goal to improve the adsorption system.…”
Section: Introductionmentioning
confidence: 99%