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Limiting-laws of polyelectrolyte solutions. Ionic distribution in mixed-valency counterions systems. II. A comparison of conductometric data and theoretical predictions
The competitive binding of monovalent and divalent counterions (M + and M 2+ , respectively) has been studied by a conductometric procedure as described by De Jong et al. (Biophysical Chemistry 27 (1987) 173) for aqueous solutions of alkali metal polymethacrylates in the presence of Ca (NO 3) 2 or M...
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| Published in: | Biophysical chemistry 1992-04, Vol.42 (3), p.297-303 |
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| container_title | Biophysical chemistry |
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| creator | C. Benegas, Julio Paoletti, Sergio Cesàro, Attilio van den Hoop, Marc A.G.T. van Leeuwen, Herman P. |
| description | The competitive binding of monovalent and divalent counterions (M
+ and M
2+ , respectively) has been studied by a conductometric procedure as described by De Jong et al. (Biophysical Chemistry 27 (1987) 173) for aqueous solutions of alkali metal polymethacrylates in the presence of Ca (NO
3)
2 or Mg(NO
3)
2. The experimentally obtained fractions of conductometrically free counterions are compared with theoretical values computed according to a new thermodynamic model recently developed by Paoletti et al. (Biophysical Chemistry, 41 (1991) 73). For the systems studied, the fractions of free monovalent and divalent counterions can be fairly well described by the theory. In fact, the results support the assumption that under the present conditions the conductometrically obtained distribution parameters ⨍
l and ⨍
2 approximate the equilibrium fractions of free monovalent and divalent counterions. For a degree of neutralization of 0.8 and a molar concentration ratio of divalent counterions and charged groups on the polyion up to 0.25, the mean M
+/M
2+, exchange ratio ν has been found to be 1.39 ± 0.03 and 1.33 ± 0.03 for the alkali metal/Ca/PMA and alkali metal/Mg/PMA systems, respectively. These values agree well with the theoretical value, which for this particular case is 1.38. |
| doi_str_mv | 10.1016/0301-4622(92)80022-W |
| format | article |
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+ and M
2+ , respectively) has been studied by a conductometric procedure as described by De Jong et al. (Biophysical Chemistry 27 (1987) 173) for aqueous solutions of alkali metal polymethacrylates in the presence of Ca (NO
3)
2 or Mg(NO
3)
2. The experimentally obtained fractions of conductometrically free counterions are compared with theoretical values computed according to a new thermodynamic model recently developed by Paoletti et al. (Biophysical Chemistry, 41 (1991) 73). For the systems studied, the fractions of free monovalent and divalent counterions can be fairly well described by the theory. In fact, the results support the assumption that under the present conditions the conductometrically obtained distribution parameters ⨍
l and ⨍
2 approximate the equilibrium fractions of free monovalent and divalent counterions. For a degree of neutralization of 0.8 and a molar concentration ratio of divalent counterions and charged groups on the polyion up to 0.25, the mean M
+/M
2+, exchange ratio ν has been found to be 1.39 ± 0.03 and 1.33 ± 0.03 for the alkali metal/Ca/PMA and alkali metal/Mg/PMA systems, respectively. These values agree well with the theoretical value, which for this particular case is 1.38.</description><identifier>ISSN: 0301-4622</identifier><identifier>EISSN: 1873-4200</identifier><identifier>DOI: 10.1016/0301-4622(92)80022-W</identifier><identifier>PMID: 17014804</identifier><identifier>CODEN: BICIAZ</identifier><language>eng</language><publisher>London: Elsevier B.V</publisher><subject>Analytical, structural and metabolic biochemistry ; Biological and medical sciences ; Conductometry ; Fundamental and applied biological sciences. Psychology ; Inorganic compounds ; Mixed-valency counterions system ; Other biological molecules ; Polyelectrolyte theory</subject><ispartof>Biophysical chemistry, 1992-04, Vol.42 (3), p.297-303</ispartof><rights>1992</rights><rights>1992 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c302t-e2ccd4c43df47460b5e90009fd097f4bf5cdc550e10f02a37b78ff283d1f70d23</citedby><cites>FETCH-LOGICAL-c302t-e2ccd4c43df47460b5e90009fd097f4bf5cdc550e10f02a37b78ff283d1f70d23</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/030146229280022W$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>315,786,790,3638,27957,27958,46018</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=5617463$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/17014804$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>C. Benegas, Julio</creatorcontrib><creatorcontrib>Paoletti, Sergio</creatorcontrib><creatorcontrib>Cesàro, Attilio</creatorcontrib><creatorcontrib>van den Hoop, Marc A.G.T.</creatorcontrib><creatorcontrib>van Leeuwen, Herman P.</creatorcontrib><title>Limiting-laws of polyelectrolyte solutions. Ionic distribution in mixed-valency counterions systems. II. A comparison of conductometric data and theoretical predictions</title><title>Biophysical chemistry</title><addtitle>Biophys Chem</addtitle><description>The competitive binding of monovalent and divalent counterions (M
+ and M
2+ , respectively) has been studied by a conductometric procedure as described by De Jong et al. (Biophysical Chemistry 27 (1987) 173) for aqueous solutions of alkali metal polymethacrylates in the presence of Ca (NO
3)
2 or Mg(NO
3)
2. The experimentally obtained fractions of conductometrically free counterions are compared with theoretical values computed according to a new thermodynamic model recently developed by Paoletti et al. (Biophysical Chemistry, 41 (1991) 73). For the systems studied, the fractions of free monovalent and divalent counterions can be fairly well described by the theory. In fact, the results support the assumption that under the present conditions the conductometrically obtained distribution parameters ⨍
l and ⨍
2 approximate the equilibrium fractions of free monovalent and divalent counterions. For a degree of neutralization of 0.8 and a molar concentration ratio of divalent counterions and charged groups on the polyion up to 0.25, the mean M
+/M
2+, exchange ratio ν has been found to be 1.39 ± 0.03 and 1.33 ± 0.03 for the alkali metal/Ca/PMA and alkali metal/Mg/PMA systems, respectively. These values agree well with the theoretical value, which for this particular case is 1.38.</description><subject>Analytical, structural and metabolic biochemistry</subject><subject>Biological and medical sciences</subject><subject>Conductometry</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Inorganic compounds</subject><subject>Mixed-valency counterions system</subject><subject>Other biological molecules</subject><subject>Polyelectrolyte theory</subject><issn>0301-4622</issn><issn>1873-4200</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1992</creationdate><recordtype>article</recordtype><recordid>eNp9kc2OFCEUhYnROG3rGxjDwhhdVHuhqK7qjclk4k8nnbjRzJJQcFFMFZRAjfYb-ZhS3Z1xJxsIfOde7jmEPGewYcC2b6EGVokt5693_E0HwHl1-4CsWNfWleAAD8nqHrkiT1L6AWUV8DG5Yi0w0YFYkT8HN7rs_LdqUL8SDZZOYTjigDrHcshIUxjm7IJPG7oP3mlqXMrR9adL6jwd3W801Z0a0Osj1WH2GeMioOmYMo6LcL-h1-VpnFR0qchKHx28mXUOI5ZqparKiipvaP6OIWJ2Wg10imicPnV_Sh5ZNSR8dtnX5OuH919uPlWHzx_3N9eHStfAc4VcayO0qI0VrdhC3-CujL2zBnatFb1ttNFNA8jAAld127edtbyrDbMtGF6vyatz3SmGnzOmLEeXNA6D8hjmJNumqUEUk9dEnEEdQ0oRrZyiG1U8SgZySUgu9svFfrnj8pSQvC2yF5f6cz-i-Se6RFKAlxdApeKBjcprl-65ZsvKXHXB3p0xLGbcOYwyaVcSKIbFEp40wf3_I38BtKqxiA</recordid><startdate>199204</startdate><enddate>199204</enddate><creator>C. Benegas, Julio</creator><creator>Paoletti, Sergio</creator><creator>Cesàro, Attilio</creator><creator>van den Hoop, Marc A.G.T.</creator><creator>van Leeuwen, Herman P.</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>IQODW</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>199204</creationdate><title>Limiting-laws of polyelectrolyte solutions. Ionic distribution in mixed-valency counterions systems. II. A comparison of conductometric data and theoretical predictions</title><author>C. Benegas, Julio ; Paoletti, Sergio ; Cesàro, Attilio ; van den Hoop, Marc A.G.T. ; van Leeuwen, Herman P.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c302t-e2ccd4c43df47460b5e90009fd097f4bf5cdc550e10f02a37b78ff283d1f70d23</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1992</creationdate><topic>Analytical, structural and metabolic biochemistry</topic><topic>Biological and medical sciences</topic><topic>Conductometry</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Inorganic compounds</topic><topic>Mixed-valency counterions system</topic><topic>Other biological molecules</topic><topic>Polyelectrolyte theory</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>C. Benegas, Julio</creatorcontrib><creatorcontrib>Paoletti, Sergio</creatorcontrib><creatorcontrib>Cesàro, Attilio</creatorcontrib><creatorcontrib>van den Hoop, Marc A.G.T.</creatorcontrib><creatorcontrib>van Leeuwen, Herman P.</creatorcontrib><collection>Pascal-Francis</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Biophysical chemistry</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>C. Benegas, Julio</au><au>Paoletti, Sergio</au><au>Cesàro, Attilio</au><au>van den Hoop, Marc A.G.T.</au><au>van Leeuwen, Herman P.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Limiting-laws of polyelectrolyte solutions. Ionic distribution in mixed-valency counterions systems. II. A comparison of conductometric data and theoretical predictions</atitle><jtitle>Biophysical chemistry</jtitle><addtitle>Biophys Chem</addtitle><date>1992-04</date><risdate>1992</risdate><volume>42</volume><issue>3</issue><spage>297</spage><epage>303</epage><pages>297-303</pages><issn>0301-4622</issn><eissn>1873-4200</eissn><coden>BICIAZ</coden><notes>ObjectType-Article-1</notes><notes>SourceType-Scholarly Journals-1</notes><notes>ObjectType-Feature-2</notes><notes>content type line 23</notes><abstract>The competitive binding of monovalent and divalent counterions (M
+ and M
2+ , respectively) has been studied by a conductometric procedure as described by De Jong et al. (Biophysical Chemistry 27 (1987) 173) for aqueous solutions of alkali metal polymethacrylates in the presence of Ca (NO
3)
2 or Mg(NO
3)
2. The experimentally obtained fractions of conductometrically free counterions are compared with theoretical values computed according to a new thermodynamic model recently developed by Paoletti et al. (Biophysical Chemistry, 41 (1991) 73). For the systems studied, the fractions of free monovalent and divalent counterions can be fairly well described by the theory. In fact, the results support the assumption that under the present conditions the conductometrically obtained distribution parameters ⨍
l and ⨍
2 approximate the equilibrium fractions of free monovalent and divalent counterions. For a degree of neutralization of 0.8 and a molar concentration ratio of divalent counterions and charged groups on the polyion up to 0.25, the mean M
+/M
2+, exchange ratio ν has been found to be 1.39 ± 0.03 and 1.33 ± 0.03 for the alkali metal/Ca/PMA and alkali metal/Mg/PMA systems, respectively. These values agree well with the theoretical value, which for this particular case is 1.38.</abstract><cop>London</cop><cop>Amsterdam</cop><cop>New York, NY</cop><pub>Elsevier B.V</pub><pmid>17014804</pmid><doi>10.1016/0301-4622(92)80022-W</doi><tpages>7</tpages></addata></record> |
| fulltext | fulltext |
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| ispartof | Biophysical chemistry, 1992-04, Vol.42 (3), p.297-303 |
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| language | eng |
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| source | ScienceDirect Physical & Analytical Chemistry Backfile |
| subjects | Analytical, structural and metabolic biochemistry Biological and medical sciences Conductometry Fundamental and applied biological sciences. Psychology Inorganic compounds Mixed-valency counterions system Other biological molecules Polyelectrolyte theory |
| title | Limiting-laws of polyelectrolyte solutions. Ionic distribution in mixed-valency counterions systems. II. A comparison of conductometric data and theoretical predictions |
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