{"title":"镉(II)和硝基膦酸(Nitrilo-Tris)二元和三元配合物与氨基酸、肽和DNA组分的电位测定研究","authors":"Azza A. Shoukry, Mohamed M. Shoukry","doi":"10.1002/adic.200790057","DOIUrl":null,"url":null,"abstract":"<p>The complexing properties of nitrilo-tris(methylphosphonic acid) (NTP) with cadmium(II) were investigated pH-metrically at 25 °C and at ionic strength of 0.1 mol dm<sup>-3</sup> (NaNO<sub>3</sub>). Stoichiometry and stability constants for the complexes formed are reported. Cadmium (II) forms Cd(NTP)<sup>4-</sup> and the corresponding hydroxy complexes. The ternary complexes are formed in a stepwise mechanism whereby NTP binds to cadmium(II), followed by coordination of amino acids, peptides or DNA. The concentration distribution of the various complex species has been evaluated.</p>","PeriodicalId":8193,"journal":{"name":"Annali di chimica","volume":"97 8","pages":"733-745"},"PeriodicalIF":0.0000,"publicationDate":"2007-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/adic.200790057","citationCount":"3","resultStr":"{\"title\":\"Potentiometric Studies of Binary and Ternary Complexes Involving Cadmium(II) and Nitrilo-Tris(Methyl Phosphonic Acid) with Amino Acids, peptides and DNA Constituents\",\"authors\":\"Azza A. Shoukry, Mohamed M. Shoukry\",\"doi\":\"10.1002/adic.200790057\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The complexing properties of nitrilo-tris(methylphosphonic acid) (NTP) with cadmium(II) were investigated pH-metrically at 25 °C and at ionic strength of 0.1 mol dm<sup>-3</sup> (NaNO<sub>3</sub>). Stoichiometry and stability constants for the complexes formed are reported. Cadmium (II) forms Cd(NTP)<sup>4-</sup> and the corresponding hydroxy complexes. The ternary complexes are formed in a stepwise mechanism whereby NTP binds to cadmium(II), followed by coordination of amino acids, peptides or DNA. The concentration distribution of the various complex species has been evaluated.</p>\",\"PeriodicalId\":8193,\"journal\":{\"name\":\"Annali di chimica\",\"volume\":\"97 8\",\"pages\":\"733-745\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2007-07-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1002/adic.200790057\",\"citationCount\":\"3\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Annali di chimica\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1002/adic.200790057\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Annali di chimica","FirstCategoryId":"1085","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/adic.200790057","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Potentiometric Studies of Binary and Ternary Complexes Involving Cadmium(II) and Nitrilo-Tris(Methyl Phosphonic Acid) with Amino Acids, peptides and DNA Constituents
The complexing properties of nitrilo-tris(methylphosphonic acid) (NTP) with cadmium(II) were investigated pH-metrically at 25 °C and at ionic strength of 0.1 mol dm-3 (NaNO3). Stoichiometry and stability constants for the complexes formed are reported. Cadmium (II) forms Cd(NTP)4- and the corresponding hydroxy complexes. The ternary complexes are formed in a stepwise mechanism whereby NTP binds to cadmium(II), followed by coordination of amino acids, peptides or DNA. The concentration distribution of the various complex species has been evaluated.
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