{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,15]],"date-time":"2025-10-15T09:57:46Z","timestamp":1760522266549},"reference-count":23,"publisher":"Wiley","issue":"10","license":[{"start":{"date-parts":[[2003,11,10]],"date-time":"2003-11-10T00:00:00Z","timestamp":1068422400000},"content-version":"vor","delay-in-days":40,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Helvetica Chimica Acta"],"published-print":{"date-parts":[[2003,10]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The influence of 2\u2010hydroxy\u20103\u2010[(2\u2010hydroxy\u20101,1\u2010dimethylethyl)amino]propane\u20101\u2010sulfonic acid (AMPSO=HL) on systems containing copper(II) was studied by glass\u2010electrode potentiometry (GEP) and direct\u2010current polarography (DCP), at fixed total\u2010ligand\u2010to\u2010total\u2010metal\u2010concentration ratios and various pH values (25\u00b0, 0.1<jats:sc>M<\/jats:sc> KNO<jats:sub>3<\/jats:sub> medium). The predicted model ([CuL]<jats:sup>+<\/jats:sup>, [CuL(OH)], [CuL<jats:sub>2<\/jats:sub>], [CuL<jats:sub>2<\/jats:sub>(OH)]<jats:sup>\u2212<\/jats:sup>, [CuL<jats:sub>2<\/jats:sub>(OH)<jats:sub>2<\/jats:sub>]<jats:sup>2\u2212<\/jats:sup>, and [CuL<jats:sub>3<\/jats:sub>]<jats:sup>\u2212<\/jats:sup>) and the overall stability constants for species found were obtained by combining results from both electrochemical techniques. The last five complexes are reported for the first time. For the species [CuL]<jats:sup>+<\/jats:sup>, [CuL<jats:sub>2<\/jats:sub>], [CuL<jats:sub>3<\/jats:sub>]<jats:sup>\u2212<\/jats:sup>, and [CuL<jats:sub>2<\/jats:sub>(OH)<jats:sub>2<\/jats:sub>]<jats:sup>2\u2212<\/jats:sup>, it was possible to determine stability constants with reasonable certainty and their values, as log\u2005<jats:italic>\u03b2<\/jats:italic>, were found to be 4.62\u00b10.04, 9.5\u00b10.1, 13.4\u00b10.1, and 21.2\u00b10.1, respectively. For the species [CuL(OH)] and [CuL<jats:sub>2<\/jats:sub>(OH)]<jats:sup>\u2212<\/jats:sup>, stability constants 11.7\u00b10.2 and 15.6\u00b10.2, respectively, are presented as indicative values. It was demonstrated that AMPSO buffer may decrease the Cu<jats:sup>2+<\/jats:sup> concentration by ten orders of magnitude by forming complexes with Cu<jats:sup>2+<\/jats:sup>. For the first time, the correction in DCP waves for the adsorption of the ligand and quasi\u2010reversibility of the metal allowed to determine stability\u2010constant values that are in good agreement with the values obtained by GEP. The importance of graphic analysis of data and significance of employing two analytical techniques was demonstrated; neither GEP nor DCP would be able to provide the correct M\/L\/OH<jats:sup>\u2212<\/jats:sup> model and reliable stability constants when used independently.<\/jats:p>","DOI":"10.1002\/hlca.200390270","type":"journal-article","created":{"date-parts":[[2004,6,1]],"date-time":"2004-06-01T18:58:57Z","timestamp":1086116337000},"page":"3288-3304","source":"Crossref","is-referenced-by-count":8,"title":["Challenges in Modelling and Optimization of Stability Constants in the Study of Metal Complexes with Monoprotonated Ligands. Part II"],"prefix":"10.1002","volume":"86","author":[{"given":"Carina\u2005M.\u2005M.","family":"Machado","sequence":"first","affiliation":[]},{"given":"Ignacy","family":"Cukrowski","sequence":"additional","affiliation":[]},{"given":"Helena\u2005M.\u2005V.\u2005M.","family":"Soares","sequence":"additional","affiliation":[]}],"member":"311","published-online":{"date-parts":[[2003,11,10]]},"reference":[{"key":"e_1_2_1_1_2","doi-asserted-by":"publisher","DOI":"10.1016\/0003-2697(80)90079-2"},{"key":"e_1_2_1_2_2","doi-asserted-by":"publisher","DOI":"10.1021\/bi00866a011"},{"key":"e_1_2_1_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0003-2670(99)00294-9"},{"key":"e_1_2_1_4_2","doi-asserted-by":"publisher","DOI":"10.1002\/(SICI)1521-4109(199911)11:17<1312::AID-ELAN1312>3.0.CO;2-I"},{"key":"e_1_2_1_5_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0003-2670(00)01028-X"},{"key":"e_1_2_1_6_2","doi-asserted-by":"publisher","DOI":"10.1002\/1521-4109(200103)13:4<325::AID-ELAN325>3.0.CO;2-E"},{"key":"e_1_2_1_7_2","author":"Machado C. M. M.","year":"2003","journal-title":"Anal. Chim. Acta"},{"key":"e_1_2_1_8_2","doi-asserted-by":"publisher","DOI":"10.1021\/ed042p375"},{"key":"e_1_2_1_9_2","doi-asserted-by":"publisher","DOI":"10.1016\/0003-2670(95)00211-H"},{"key":"e_1_2_1_10_2","doi-asserted-by":"publisher","DOI":"10.1021\/je990307h"},{"key":"e_1_2_1_11_2","doi-asserted-by":"publisher","DOI":"10.1021\/je9901031"},{"key":"e_1_2_1_12_2","doi-asserted-by":"publisher","DOI":"10.1021\/je9603279"},{"key":"e_1_2_1_13_2","doi-asserted-by":"publisher","DOI":"10.1021\/je0000625"},{"key":"e_1_2_1_14_2","doi-asserted-by":"publisher","DOI":"10.1021\/je0001779"},{"key":"e_1_2_1_15_2","doi-asserted-by":"publisher","DOI":"10.1016\/0039-9140(88)80197-8"},{"key":"e_1_2_1_16_2","unstructured":"\u2018NIST Standard Reference Database 46. NIST Critically Selected Stability Constants of Metal Complexes Database\u2019 Version 3.0 data collected and selected by R.\u2005M. Smith and A.\u2005E. Martell US Department of Commerce National Institute of Standards and Technology 1997."},{"key":"e_1_2_1_17_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0003-2670(96)00335-2"},{"key":"e_1_2_1_18_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0022-0728(97)00145-9"},{"key":"e_1_2_1_19_2","doi-asserted-by":"publisher","DOI":"10.1021\/ac60232a001"},{"key":"e_1_2_1_20_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0022-0728(98)00376-3"},{"key":"e_1_2_1_21_2","doi-asserted-by":"publisher","DOI":"10.1080\/00958978808081659"},{"key":"e_1_2_1_22_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0003-2670(00)80278-0"},{"key":"e_1_2_1_23_2","doi-asserted-by":"publisher","DOI":"10.1016\/0022-0728(86)80205-4"}],"container-title":["Helvetica Chimica Acta"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1002%2Fhlca.200390270","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/hlca.200390270","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,11,17]],"date-time":"2023-11-17T07:17:19Z","timestamp":1700205439000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/hlca.200390270"}},"subtitle":["A Glass\u2010Electrode Potentiometric and Polarographic Study of the Copper(II)\/2\u2010Hydroxy\u20103\u2010[(2\u2010hydroxy\u20101,1\u2010dimethylethyl)amino]propane\u20101\u2010sulfonic Acid (AMPSO)\/Hydroxy System"],"short-title":[],"issued":{"date-parts":[[2003,10]]},"references-count":23,"journal-issue":{"issue":"10","published-print":{"date-parts":[[2003,10]]}},"alternative-id":["10.1002\/hlca.200390270"],"URL":"https:\/\/doi.org\/10.1002\/hlca.200390270","archive":["Portico"],"relation":{},"ISSN":["0018-019X","1522-2675"],"issn-type":[{"value":"0018-019X","type":"print"},{"value":"1522-2675","type":"electronic"}],"subject":[],"published":{"date-parts":[[2003,10]]}}}