Effect of microemulsion-like polysoap on the catalysed esterolysis of hydrophobic p -nitrophenyl esters
Identifieur interne : 000A69 ( Istex/Corpus ); précédent : 000A68; suivant : 000A70Effect of microemulsion-like polysoap on the catalysed esterolysis of hydrophobic p -nitrophenyl esters
Auteurs : Abdesselam Benjelloun ; Pierre Lochon ; Alain BrembillaSource :
- Journal of Molecular Catalysis A: Chemical [ 1381-1169 ] ; 1999.
English descriptors
- KwdEn :
- Alkanoates, Benjelloun, Bimoh, Brembilla, Bromide, Catalysis, Chem, Ehpb, Ehpb micelles, Ester, Esterolysis, Esterolytic activity, Ethanol, Hepes, Hepes buffer, Homopolymer, Hydrophobic microdomains, Ligand, Lochon, Metal ions, Microdomains, Molecular catalysis, Obsd, Overall rate, Picolinates, Picolinic esters, Polymer, Polymer concentration, Rate constants, Surfactant, Zn2q, Zn2q ions.
- Teeft :
- Alkanoates, Benjelloun, Bimoh, Brembilla, Bromide, Catalysis, Chem, Ehpb, Ehpb micelles, Ester, Esterolysis, Esterolytic activity, Ethanol, Hepes, Hepes buffer, Homopolymer, Hydrophobic microdomains, Ligand, Lochon, Metal ions, Microdomains, Molecular catalysis, Obsd, Overall rate, Picolinates, Picolinic esters, Polymer, Polymer concentration, Rate constants, Surfactant, Zn2q, Zn2q ions.
Abstract
Abstract: The esterolytic activity of metal ion complexes of n-alkyl-2-hydroxymethylbenzimidazoles/Zn2+ towards p-nitrophenyl esters (picolinates and alkanoates) was investigated in the presence of an amphiphilic polymer, poly(1-hexadecyl-3-vinylpyridinium bromide), as a macromolecular matrix. The reaction rate constants obtained for the polymer hydrophobic microdomains were compared with those observed for the new conventional surfactant, 3-ethyl-1-hexadecylpyridinium bromide, chosen as the model of the repeat unit of the homopolymer. In both cases, the kinetic analysis indicated that the esterolysis reaction proceeds through the formation of an initial binary complex Ligand–Zn2+, the stoichiometry of which is 2/1 type.
Url:
DOI: 10.1016/S1381-1169(98)00232-5
Links to Exploration step
ISTEX:4E82C2C47D2D66B7A78162A3ED7ACF875E144D2CLe document en format XML
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last="Brembilla">Alain Brembilla</name><affiliation><mods:affiliation>Laboratoire de Chimie-Physique Macromoléculaire, UMR CNRS-INPL 7568, ENSIC, 1 Rue Grandville, BP 451, 54001 Nancy Cedex, France</mods:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:4E82C2C47D2D66B7A78162A3ED7ACF875E144D2C</idno><date when="1999" year="1999">1999</date><idno type="doi">10.1016/S1381-1169(98)00232-5</idno><idno type="url">https://api.istex.fr/document/4E82C2C47D2D66B7A78162A3ED7ACF875E144D2C/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000A69</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">000A69</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a">Effect of microemulsion-like polysoap on the catalysed esterolysis of hydrophobic p -nitrophenyl esters</title><author><name sortKey="Benjelloun, Abdesselam" sort="Benjelloun, Abdesselam" uniqKey="Benjelloun A" first="Abdesselam" last="Benjelloun">Abdesselam Benjelloun</name><affiliation><mods:affiliation>Laboratoire de Chimie-Physique Macromoléculaire, UMR CNRS-INPL 7568, ENSIC, 1 Rue Grandville, BP 451, 54001 Nancy Cedex, France</mods:affiliation></affiliation></author><author><name sortKey="Lochon, Pierre" sort="Lochon, Pierre" uniqKey="Lochon P" first="Pierre" last="Lochon">Pierre Lochon</name><affiliation><mods:affiliation>Laboratoire de Chimie-Physique Macromoléculaire, UMR CNRS-INPL 7568, ENSIC, 1 Rue Grandville, BP 451, 54001 Nancy Cedex, France</mods:affiliation></affiliation></author><author><name sortKey="Brembilla, Alain" sort="Brembilla, Alain" uniqKey="Brembilla A" first="Alain" last="Brembilla">Alain Brembilla</name><affiliation><mods:affiliation>Laboratoire de Chimie-Physique Macromoléculaire, UMR CNRS-INPL 7568, ENSIC, 1 Rue Grandville, BP 451, 54001 Nancy Cedex, France</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">Journal of Molecular Catalysis A: Chemical</title><title level="j" type="abbrev">MOLCAA</title><idno type="ISSN">1381-1169</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="1999">1999</date><biblScope unit="volume">140</biblScope><biblScope unit="issue">3</biblScope><biblScope unit="page" from="215">215</biblScope><biblScope unit="page" to="223">223</biblScope></imprint><idno type="ISSN">1381-1169</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">1381-1169</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Alkanoates</term><term>Benjelloun</term><term>Bimoh</term><term>Brembilla</term><term>Bromide</term><term>Catalysis</term><term>Chem</term><term>Ehpb</term><term>Ehpb micelles</term><term>Ester</term><term>Esterolysis</term><term>Esterolytic activity</term><term>Ethanol</term><term>Hepes</term><term>Hepes buffer</term><term>Homopolymer</term><term>Hydrophobic microdomains</term><term>Ligand</term><term>Lochon</term><term>Metal ions</term><term>Microdomains</term><term>Molecular catalysis</term><term>Obsd</term><term>Overall rate</term><term>Picolinates</term><term>Picolinic esters</term><term>Polymer</term><term>Polymer concentration</term><term>Rate constants</term><term>Surfactant</term><term>Zn2q</term><term>Zn2q ions</term></keywords><keywords scheme="Teeft" xml:lang="en"><term>Alkanoates</term><term>Benjelloun</term><term>Bimoh</term><term>Brembilla</term><term>Bromide</term><term>Catalysis</term><term>Chem</term><term>Ehpb</term><term>Ehpb micelles</term><term>Ester</term><term>Esterolysis</term><term>Esterolytic activity</term><term>Ethanol</term><term>Hepes</term><term>Hepes buffer</term><term>Homopolymer</term><term>Hydrophobic microdomains</term><term>Ligand</term><term>Lochon</term><term>Metal ions</term><term>Microdomains</term><term>Molecular catalysis</term><term>Obsd</term><term>Overall rate</term><term>Picolinates</term><term>Picolinic esters</term><term>Polymer</term><term>Polymer concentration</term><term>Rate constants</term><term>Surfactant</term><term>Zn2q</term><term>Zn2q ions</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Abstract: The esterolytic activity of metal ion complexes of n-alkyl-2-hydroxymethylbenzimidazoles/Zn2+ towards p-nitrophenyl esters (picolinates and alkanoates) was investigated in the presence of an amphiphilic polymer, poly(1-hexadecyl-3-vinylpyridinium bromide), as a macromolecular matrix. The reaction rate constants obtained for the polymer hydrophobic microdomains were compared with those observed for the new conventional surfactant, 3-ethyl-1-hexadecylpyridinium bromide, chosen as the model of the repeat unit of the homopolymer. In both cases, the kinetic analysis indicated that the esterolysis reaction proceeds through the formation of an initial binary complex Ligand–Zn2+, the stoichiometry of which is 2/1 type.</div></front></TEI><istex><corpusName>elsevier</corpusName><keywords><teeft><json:string>ester</json:string><json:string>obsd</json:string><json:string>ehpb</json:string><json:string>polymer</json:string><json:string>bimoh</json:string><json:string>zn2q</json:string><json:string>benjelloun</json:string><json:string>esterolysis</json:string><json:string>catalysis</json:string><json:string>bromide</json:string><json:string>ligand</json:string><json:string>chem</json:string><json:string>microdomains</json:string><json:string>molecular catalysis</json:string><json:string>homopolymer</json:string><json:string>ehpb micelles</json:string><json:string>alkanoates</json:string><json:string>lochon</json:string><json:string>brembilla</json:string><json:string>picolinates</json:string><json:string>hepes buffer</json:string><json:string>hepes</json:string><json:string>zn2q ions</json:string><json:string>polymer concentration</json:string><json:string>overall rate</json:string><json:string>surfactant</json:string><json:string>esterolytic activity</json:string><json:string>ethanol</json:string><json:string>picolinic esters</json:string><json:string>rate constants</json:string><json:string>metal ions</json:string><json:string>hydrophobic microdomains</json:string></teeft></keywords><author><json:item><name>Abdesselam Benjelloun</name><affiliations><json:string>Laboratoire de Chimie-Physique Macromoléculaire, UMR CNRS-INPL 7568, ENSIC, 1 Rue Grandville, BP 451, 54001 Nancy Cedex, France</json:string></affiliations></json:item><json:item><name>Pierre Lochon</name><affiliations><json:string>Laboratoire de Chimie-Physique Macromoléculaire, UMR CNRS-INPL 7568, ENSIC, 1 Rue Grandville, BP 451, 54001 Nancy Cedex, France</json:string></affiliations></json:item><json:item><name>Alain Brembilla</name><affiliations><json:string>Laboratoire de Chimie-Physique Macromoléculaire, UMR CNRS-INPL 7568, ENSIC, 1 Rue Grandville, BP 451, 54001 Nancy Cedex, France</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>Hydrophobic p-nitrophenyl esters</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Alkyl-chain benzimidazole ligands</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Esterolysis activity</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Amphiphilic polymer microdomains</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Microenvironment effects</value></json:item></subject><language><json:string>eng</json:string></language><originalGenre><json:string>Full-length article</json:string></originalGenre><abstract>The esterolytic activity of metal ion complexes of n-alkyl-2-hydroxymethylbenzimidazoles/Zn2+ towards p-nitrophenyl esters (picolinates and alkanoates) was investigated in the presence of an amphiphilic polymer, poly(1-hexadecyl-3-vinylpyridinium bromide), as a macromolecular matrix. The reaction rate constants obtained for the polymer hydrophobic microdomains were compared with those observed for the new conventional surfactant, 3-ethyl-1-hexadecylpyridinium bromide, chosen as the model of the repeat unit of the homopolymer. In both cases, the kinetic analysis indicated that the esterolysis reaction proceeds through the formation of an initial binary complex Ligand–Zn2+, the stoichiometry of which is 2/1 type.</abstract><qualityIndicators><score>4.643</score><pdfVersion>1.2</pdfVersion><pdfPageSize>540 x 712 pts</pdfPageSize><refBibsNative>true</refBibsNative><keywordCount>5</keywordCount><abstractCharCount>720</abstractCharCount><pdfWordCount>3551</pdfWordCount><pdfCharCount>19400</pdfCharCount><pdfPageCount>9</pdfPageCount><abstractWordCount>91</abstractWordCount></qualityIndicators><title>Effect of microemulsion-like polysoap on the catalysed esterolysis of hydrophobic p -nitrophenyl esters</title><pii><json:string>S1381-1169(98)00232-5</json:string></pii><genre><json:string>research-article</json:string></genre><host><title>Journal of Molecular Catalysis A: Chemical</title><language><json:string>unknown</json:string></language><publicationDate>1999</publicationDate><issn><json:string>1381-1169</json:string></issn><pii><json:string>S1381-1169(00)X0096-9</json:string></pii><volume>140</volume><issue>3</issue><pages><first>215</first><last>223</last></pages><genre><json:string>journal</json:string></genre></host><categories><wos><json:string>science</json:string><json:string>chemistry, physical</json:string></wos><scienceMetrix><json:string>natural sciences</json:string><json:string>chemistry</json:string><json:string>physical chemistry</json:string></scienceMetrix><inist><json:string>sciences appliquees, technologies et medecines</json:string><json:string>sciences biologiques et medicales</json:string><json:string>sciences biologiques fondamentales et appliquees. psychologie</json:string><json:string>biotechnologie</json:string></inist></categories><publicationDate>1999</publicationDate><copyrightDate>1999</copyrightDate><doi><json:string>10.1016/S1381-1169(98)00232-5</json:string></doi><id>4E82C2C47D2D66B7A78162A3ED7ACF875E144D2C</id><score>1</score><fulltext><json:item><extension>pdf</extension><original>true</original><mimetype>application/pdf</mimetype><uri>https://api.istex.fr/document/4E82C2C47D2D66B7A78162A3ED7ACF875E144D2C/fulltext/pdf</uri></json:item><json:item><extension>zip</extension><original>false</original><mimetype>application/zip</mimetype><uri>https://api.istex.fr/document/4E82C2C47D2D66B7A78162A3ED7ACF875E144D2C/fulltext/zip</uri></json:item><istex:fulltextTEI uri="https://api.istex.fr/document/4E82C2C47D2D66B7A78162A3ED7ACF875E144D2C/fulltext/tei"><teiHeader><fileDesc><titleStmt><title level="a">Effect of microemulsion-like polysoap on the catalysed esterolysis of hydrophobic p -nitrophenyl esters</title></titleStmt><publicationStmt><authority>ISTEX</authority><publisher>ELSEVIER</publisher><availability><p>©1999 Elsevier Science B.V.</p></availability><date>1999</date></publicationStmt><notesStmt><note type="content">Scheme. 1:</note><note type="content">Fig. 1: Job plot for the hydrolysis of C7E by C10BimOH in the presence of PC16VPB. T=30°C; HEPES buffer=0.015 M (containing ethanol 1%/n-propanol 3% vol.); I=6.10−3 M; pH=7.1. [PC16VPB] varied from 3×10−4 M to 7×10−4 M. The sum of the zinc ion and C10BimOH concentrations was kept constant at 1×10−4 M; [C7E]=2.5×10−5 M.</note><note type="content">Fig. 2: Job plot for the hydrolysis of C7E by C10BimOH in the presence of EHPB. T=30°C; HEPES buffer=0.015 M (containing ethanol 1%/n-propanol 3% vol.); I=6xc; pH=7.1. [PC16VPB] varied from 4×10−4 M to 7×10−4 M. The sum of the zinc ion and C10BimOH concentrations was kept constant at 1×10−4 M; [C7E]=2.5×10−5 M.</note><note type="content">Fig. 3: Plots of kobsd–k0 for the hydrolysis of C7E as a function of zinc ion concentration. T=30°C; [C10BimOH]=0.5, 1, 1.5, 2×10−4 M; [C7E]=2.5×10−5 M. (a) In the presence of PC16VIB; (b) in the presence of EHPB. [PC16VIB]=[EHPB]=6×10−4 M, see Table 1 for other conditions.</note><note type="content">Fig. 4: Plots of kobsd–k0 at saturation as a function of [L]0/2 for the pair (C10BimOH, C7E).</note><note type="content">Fig. 5: Plots of 1/kobsd–k0 vs. 1/[M]0 for the pair (C10BimOH, C7E). T=30°C; [C10BimOH]=0.5, 1, 1.5, 2×10−4 M; [C7E]=2.5×10−5 M. (a) In the presence of PC16VIB; (b) in the presence of EHPB. [PC16VIB]=[EHPB]=6×10−4 M.</note><note type="content">Fig. 6: Dependence of kobsd on the chain length of the esters (picolinates) for the ligand C10BimOH. T=30°C; pH=7.1; HEPES buffer=0.015 M (ethanol 1%/n-propanol 3%) M; I=6×10−3 M; [PC16VPB]=[EHPB]=6×10−4 M, [Ligand]=1×10−4 M, [Zn2+]=2×10−4 M, [C7E]=2.5×10−5 M.</note><note type="content">Fig. 7: Dependence of kobsd on the chain length of the esters (alkanoates) for the ligand C10Bim. T=30°C; pH=7.1; HEPES buffer=0.015 M (ethanol 1%/n-propanol 3%) M; I=6×10−3 M; [PC16VPB]=[EHPB]=6×10−4 M, [Ligand]=1×10−4 M, [Zn2+]=2×10−4 M, [CnONP]=2.5×10−5 M.</note><note type="content">Table 1: Pseudo-first-order rate constants and second-order rate constants for the p-nitrophenolate ion release of the picolinic esters in the presence of C10BimOH</note><note type="content">Table 2: Pseudo-first-order rate constants for the esterolysis of the p-nitrophenyl alkanoates</note></notesStmt><sourceDesc><biblStruct type="inbook"><analytic><title level="a">Effect of microemulsion-like polysoap on the catalysed esterolysis of hydrophobic p -nitrophenyl esters</title><author xml:id="author-0000"><persName><forename type="first">Abdesselam</forename><surname>Benjelloun</surname></persName><affiliation>Laboratoire de Chimie-Physique Macromoléculaire, UMR CNRS-INPL 7568, ENSIC, 1 Rue Grandville, BP 451, 54001 Nancy Cedex, France</affiliation></author><author xml:id="author-0001"><persName><forename type="first">Pierre</forename><surname>Lochon</surname></persName><affiliation>Laboratoire de Chimie-Physique Macromoléculaire, UMR CNRS-INPL 7568, ENSIC, 1 Rue Grandville, BP 451, 54001 Nancy Cedex, France</affiliation></author><author xml:id="author-0002"><persName><forename type="first">Alain</forename><surname>Brembilla</surname></persName><note type="correspondence"><p>Corresponding author. Tel.: +33-383175284; Fax: +33-383379977</p></note><affiliation>Laboratoire de Chimie-Physique Macromoléculaire, UMR CNRS-INPL 7568, ENSIC, 1 Rue Grandville, BP 451, 54001 Nancy Cedex, France</affiliation></author><idno type="istex">4E82C2C47D2D66B7A78162A3ED7ACF875E144D2C</idno><idno type="DOI">10.1016/S1381-1169(98)00232-5</idno><idno type="PII">S1381-1169(98)00232-5</idno></analytic><monogr><title level="j">Journal of Molecular Catalysis A: Chemical</title><title level="j" type="abbrev">MOLCAA</title><idno type="pISSN">1381-1169</idno><idno type="PII">S1381-1169(00)X0096-9</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="1999"></date><biblScope unit="volume">140</biblScope><biblScope unit="issue">3</biblScope><biblScope unit="page" from="215">215</biblScope><biblScope unit="page" to="223">223</biblScope></imprint></monogr></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>1999</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>The esterolytic activity of metal ion complexes of n-alkyl-2-hydroxymethylbenzimidazoles/Zn2+ towards p-nitrophenyl esters (picolinates and alkanoates) was investigated in the presence of an amphiphilic polymer, poly(1-hexadecyl-3-vinylpyridinium bromide), as a macromolecular matrix. The reaction rate constants obtained for the polymer hydrophobic microdomains were compared with those observed for the new conventional surfactant, 3-ethyl-1-hexadecylpyridinium bromide, chosen as the model of the repeat unit of the homopolymer. In both cases, the kinetic analysis indicated that the esterolysis reaction proceeds through the formation of an initial binary complex Ligand–Zn2+, the stoichiometry of which is 2/1 type.</p></abstract><textClass><keywords scheme="keyword"><list><head>Keywords</head><item><term>Hydrophobic p-nitrophenyl esters</term></item><item><term>Alkyl-chain benzimidazole ligands</term></item><item><term>Esterolysis activity</term></item><item><term>Amphiphilic polymer microdomains</term></item><item><term>Microenvironment effects</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="1999">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/4E82C2C47D2D66B7A78162A3ED7ACF875E144D2C/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Elsevier, elements deleted: ce:floats; body; tail"><istex:xmlDeclaration>version="1.0" encoding="utf-8"</istex:xmlDeclaration><istex:docType PUBLIC="-//ES//DTD journal article DTD version 4.5.2//EN//XML" URI="art452.dtd" name="istex:docType"><istex:entity SYSTEM="sc1" NDATA="IMAGE" name="sc1"></istex:entity><istex:entity SYSTEM="gr1" NDATA="IMAGE" name="gr1"></istex:entity><istex:entity SYSTEM="gr2" NDATA="IMAGE" name="gr2"></istex:entity><istex:entity SYSTEM="gr3" NDATA="IMAGE" name="gr3"></istex:entity><istex:entity SYSTEM="gr4" NDATA="IMAGE" name="gr4"></istex:entity><istex:entity SYSTEM="gr5" NDATA="IMAGE" name="gr5"></istex:entity><istex:entity SYSTEM="gr6" NDATA="IMAGE" name="gr6"></istex:entity><istex:entity SYSTEM="gr7" NDATA="IMAGE" name="gr7"></istex:entity></istex:docType><istex:document><converted-article version="4.5.2" docsubtype="fla"><item-info><jid>MOLCAA</jid><aid>2000</aid><ce:pii>S1381-1169(98)00232-5</ce:pii><ce:doi>10.1016/S1381-1169(98)00232-5</ce:doi><ce:copyright year="1999" type="full-transfer">Elsevier Science B.V.</ce:copyright></item-info><head><ce:title>Effect of microemulsion-like polysoap on the catalysed esterolysis of hydrophobic <ce:italic>p</ce:italic>-nitrophenyl esters</ce:title><ce:author-group><ce:author><ce:given-name>Abdesselam</ce:given-name><ce:surname>Benjelloun</ce:surname></ce:author><ce:author><ce:given-name>Pierre</ce:given-name><ce:surname>Lochon</ce:surname></ce:author><ce:author><ce:given-name>Alain</ce:given-name><ce:surname>Brembilla</ce:surname><ce:cross-ref refid="CORR1">*</ce:cross-ref></ce:author><ce:affiliation><ce:textfn>Laboratoire de Chimie-Physique Macromoléculaire, UMR CNRS-INPL 7568, ENSIC, 1 Rue Grandville, BP 451, 54001 Nancy Cedex, France</ce:textfn></ce:affiliation><ce:correspondence id="CORR1"><ce:label>*</ce:label><ce:text>Corresponding author. Tel.: +33-383175284; Fax: +33-383379977</ce:text></ce:correspondence></ce:author-group><ce:date-received day="22" month="4" year="1998"></ce:date-received><ce:date-accepted day="8" month="7" year="1998"></ce:date-accepted><ce:abstract><ce:section-title>Abstract</ce:section-title><ce:abstract-sec><ce:simple-para>The esterolytic activity of metal ion complexes of <ce:italic>n</ce:italic>-alkyl-2-hydroxymethylbenzimidazoles/Zn<ce:sup>2+</ce:sup> towards <ce:italic>p</ce:italic>-nitrophenyl esters (picolinates and alkanoates) was investigated in the presence of an amphiphilic polymer, poly(1-hexadecyl-3-vinylpyridinium bromide), as a macromolecular matrix. The reaction rate constants obtained for the polymer hydrophobic microdomains were compared with those observed for the new conventional surfactant, 3-ethyl-1-hexadecylpyridinium bromide, chosen as the model of the repeat unit of the homopolymer. In both cases, the kinetic analysis indicated that the esterolysis reaction proceeds through the formation of an initial binary complex Ligand–Zn<ce:sup>2+</ce:sup>, the stoichiometry of which is 2/1 type.</ce:simple-para></ce:abstract-sec></ce:abstract><ce:keywords class="keyword"><ce:section-title>Keywords</ce:section-title><ce:keyword><ce:text>Hydrophobic <ce:italic>p</ce:italic>-nitrophenyl esters</ce:text></ce:keyword><ce:keyword><ce:text>Alkyl-chain benzimidazole ligands</ce:text></ce:keyword><ce:keyword><ce:text>Esterolysis activity</ce:text></ce:keyword><ce:keyword><ce:text>Amphiphilic polymer microdomains</ce:text></ce:keyword><ce:keyword><ce:text>Microenvironment effects</ce:text></ce:keyword></ce:keywords></head></converted-article></istex:document></istex:metadataXml><mods version="3.6"><titleInfo><title>Effect of microemulsion-like polysoap on the catalysed esterolysis of hydrophobic p -nitrophenyl esters</title></titleInfo><titleInfo type="alternative" contentType="CDATA"><title>Effect of microemulsion-like polysoap on the catalysed esterolysis of hydrophobic</title></titleInfo><name type="personal"><namePart type="given">Abdesselam</namePart><namePart type="family">Benjelloun</namePart><affiliation>Laboratoire de Chimie-Physique Macromoléculaire, UMR CNRS-INPL 7568, ENSIC, 1 Rue Grandville, BP 451, 54001 Nancy Cedex, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Pierre</namePart><namePart type="family">Lochon</namePart><affiliation>Laboratoire de Chimie-Physique Macromoléculaire, UMR CNRS-INPL 7568, ENSIC, 1 Rue Grandville, BP 451, 54001 Nancy Cedex, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Alain</namePart><namePart type="family">Brembilla</namePart><affiliation>Laboratoire de Chimie-Physique Macromoléculaire, UMR CNRS-INPL 7568, ENSIC, 1 Rue Grandville, BP 451, 54001 Nancy Cedex, France</affiliation><description>Corresponding author. Tel.: +33-383175284; Fax: +33-383379977</description><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="research-article" displayLabel="Full-length article" authority="ISTEX" authorityURI="https://content-type.data.istex.fr" valueURI="https://content-type.data.istex.fr/ark:/67375/XTP-1JC4F85T-7">research-article</genre><originInfo><publisher>ELSEVIER</publisher><dateIssued encoding="w3cdtf">1999</dateIssued><copyrightDate encoding="w3cdtf">1999</copyrightDate></originInfo><language><languageTerm type="code" authority="iso639-2b">eng</languageTerm><languageTerm type="code" authority="rfc3066">en</languageTerm></language><abstract lang="en">Abstract: The esterolytic activity of metal ion complexes of n-alkyl-2-hydroxymethylbenzimidazoles/Zn2+ towards p-nitrophenyl esters (picolinates and alkanoates) was investigated in the presence of an amphiphilic polymer, poly(1-hexadecyl-3-vinylpyridinium bromide), as a macromolecular matrix. The reaction rate constants obtained for the polymer hydrophobic microdomains were compared with those observed for the new conventional surfactant, 3-ethyl-1-hexadecylpyridinium bromide, chosen as the model of the repeat unit of the homopolymer. In both cases, the kinetic analysis indicated that the esterolysis reaction proceeds through the formation of an initial binary complex Ligand–Zn2+, the stoichiometry of which is 2/1 type.</abstract><note type="content">Scheme. 1: </note><note type="content">Fig. 1: Job plot for the hydrolysis of C7E by C10BimOH in the presence of PC16VPB. T=30°C; HEPES buffer=0.015 M (containing ethanol 1%/n-propanol 3% vol.); I=6.10−3 M; pH=7.1. [PC16VPB] varied from 3×10−4 M to 7×10−4 M. The sum of the zinc ion and C10BimOH concentrations was kept constant at 1×10−4 M; [C7E]=2.5×10−5 M.</note><note type="content">Fig. 2: Job plot for the hydrolysis of C7E by C10BimOH in the presence of EHPB. T=30°C; HEPES buffer=0.015 M (containing ethanol 1%/n-propanol 3% vol.); I=6xc; pH=7.1. [PC16VPB] varied from 4×10−4 M to 7×10−4 M. The sum of the zinc ion and C10BimOH concentrations was kept constant at 1×10−4 M; [C7E]=2.5×10−5 M.</note><note type="content">Fig. 3: Plots of kobsd–k0 for the hydrolysis of C7E as a function of zinc ion concentration. T=30°C; [C10BimOH]=0.5, 1, 1.5, 2×10−4 M; [C7E]=2.5×10−5 M. (a) In the presence of PC16VIB; (b) in the presence of EHPB. [PC16VIB]=[EHPB]=6×10−4 M, see Table 1 for other conditions.</note><note type="content">Fig. 4: Plots of kobsd–k0 at saturation as a function of [L]0/2 for the pair (C10BimOH, C7E).</note><note type="content">Fig. 5: Plots of 1/kobsd–k0 vs. 1/[M]0 for the pair (C10BimOH, C7E). T=30°C; [C10BimOH]=0.5, 1, 1.5, 2×10−4 M; [C7E]=2.5×10−5 M. (a) In the presence of PC16VIB; (b) in the presence of EHPB. [PC16VIB]=[EHPB]=6×10−4 M.</note><note type="content">Fig. 6: Dependence of kobsd on the chain length of the esters (picolinates) for the ligand C10BimOH. T=30°C; pH=7.1; HEPES buffer=0.015 M (ethanol 1%/n-propanol 3%) M; I=6×10−3 M; [PC16VPB]=[EHPB]=6×10−4 M, [Ligand]=1×10−4 M, [Zn2+]=2×10−4 M, [C7E]=2.5×10−5 M.</note><note type="content">Fig. 7: Dependence of kobsd on the chain length of the esters (alkanoates) for the ligand C10Bim. T=30°C; pH=7.1; HEPES buffer=0.015 M (ethanol 1%/n-propanol 3%) M; I=6×10−3 M; [PC16VPB]=[EHPB]=6×10−4 M, [Ligand]=1×10−4 M, [Zn2+]=2×10−4 M, [CnONP]=2.5×10−5 M.</note><note type="content">Table 1: Pseudo-first-order rate constants and second-order rate constants for the p-nitrophenolate ion release of the picolinic esters in the presence of C10BimOH</note><note type="content">Table 2: Pseudo-first-order rate constants for the esterolysis of the p-nitrophenyl alkanoates</note><subject><genre>Keywords</genre><topic>Hydrophobic p-nitrophenyl esters</topic><topic>Alkyl-chain benzimidazole ligands</topic><topic>Esterolysis activity</topic><topic>Amphiphilic polymer microdomains</topic><topic>Microenvironment effects</topic></subject><relatedItem type="host"><titleInfo><title>Journal of Molecular Catalysis A: Chemical</title></titleInfo><titleInfo type="abbreviated"><title>MOLCAA</title></titleInfo><genre type="journal" authority="ISTEX" authorityURI="https://publication-type.data.istex.fr" valueURI="https://publication-type.data.istex.fr/ark:/67375/JMC-0GLKJH51-B">journal</genre><originInfo><publisher>ELSEVIER</publisher><dateIssued encoding="w3cdtf">19990423</dateIssued></originInfo><identifier type="ISSN">1381-1169</identifier><identifier type="PII">S1381-1169(00)X0096-9</identifier><part><date>19990423</date><detail type="volume"><number>140</number><caption>vol.</caption></detail><detail type="issue"><number>3</number><caption>no.</caption></detail><extent unit="issue-pages"><start>215</start><end>318</end></extent><extent unit="pages"><start>215</start><end>223</end></extent></part></relatedItem><identifier type="istex">4E82C2C47D2D66B7A78162A3ED7ACF875E144D2C</identifier><identifier type="ark">ark:/67375/6H6-DNSXZ2P8-K</identifier><identifier type="DOI">10.1016/S1381-1169(98)00232-5</identifier><identifier type="PII">S1381-1169(98)00232-5</identifier><accessCondition type="use and reproduction" contentType="copyright">©1999 Elsevier Science B.V.</accessCondition><recordInfo><recordContentSource authority="ISTEX" authorityURI="https://loaded-corpus.data.istex.fr" valueURI="https://loaded-corpus.data.istex.fr/ark:/67375/XBH-HKKZVM7B-M">elsevier</recordContentSource><recordOrigin>Elsevier Science B.V., ©1999</recordOrigin></recordInfo></mods><json:item><extension>json</extension><original>false</original><mimetype>application/json</mimetype><uri>https://api.istex.fr/document/4E82C2C47D2D66B7A78162A3ED7ACF875E144D2C/metadata/json</uri></json:item></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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