Semifluorinated chains in 2D-(perfluorododecyl)-alkanes at the air/water interface
Langmuir monolayers of a homologous series of perfluorododecyl- n-alkanes (general formula F(CF 2) 12(CH 2) n H, abbreviated as F12H n, where n = 6 – 20 ) are investigated through isotherms of surface pressure ( π) and electric surface potential (Δ V) versus area ( A) and quantitative Brewster angle...
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Veröffentlicht in: | Journal of colloid and interface science 2004-11, Vol.279 (2), p.552-558 |
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creator | Broniatowski, M. Miñones, J. Dynarowicz-Łątka, P. |
description | Langmuir monolayers of a homologous series of perfluorododecyl-
n-alkanes (general formula F(CF
2)
12(CH
2)
n
H, abbreviated as F12H
n, where
n
=
6
–
20
) are investigated through isotherms of surface pressure (
π) and electric surface potential (Δ
V) versus area (
A) and quantitative Brewster angle microscopy. The investigated monolayers are found to be liquid in nature. The negative sign of the measured surface potential evidences the orientation of all the investigated molecules with their perfluorinated parts directed toward the air regardless of the length of the hydrogenated unit. Analysis of the direction of the molecular dipole moment with respect to the main axis indicates that the minimum effective dipole moment is achieved for a molecule oriented at an angle of about 35° to the surface normal. The film thickness was evaluated from the relative intensity measurements. The results suggest that the F12H
n molecules are tilted to the interface in the vicinity of collapse, which is in accordance with the liquid character of their monolayers. |
doi_str_mv | 10.1016/j.jcis.2004.06.080 |
format | Article |
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n-alkanes (general formula F(CF
2)
12(CH
2)
n
H, abbreviated as F12H
n, where
n
=
6
–
20
) are investigated through isotherms of surface pressure (
π) and electric surface potential (Δ
V) versus area (
A) and quantitative Brewster angle microscopy. The investigated monolayers are found to be liquid in nature. The negative sign of the measured surface potential evidences the orientation of all the investigated molecules with their perfluorinated parts directed toward the air regardless of the length of the hydrogenated unit. Analysis of the direction of the molecular dipole moment with respect to the main axis indicates that the minimum effective dipole moment is achieved for a molecule oriented at an angle of about 35° to the surface normal. The film thickness was evaluated from the relative intensity measurements. The results suggest that the F12H
n molecules are tilted to the interface in the vicinity of collapse, which is in accordance with the liquid character of their monolayers.</description><identifier>ISSN: 0021-9797</identifier><identifier>EISSN: 1095-7103</identifier><identifier>DOI: 10.1016/j.jcis.2004.06.080</identifier><identifier>PMID: 15464824</identifier><identifier>CODEN: JCISA5</identifier><language>eng</language><publisher>San Diego, CA: Elsevier Inc</publisher><subject>Air ; Air/water interface ; Alkanes - chemistry ; Brewster angle microscopy ; Chemistry ; Effective dipole moments ; Exact sciences and technology ; Fluorocarbons - chemistry ; General and physical chemistry ; Langmuir monolayers ; Phase Transition ; Semifluorinated alkanes ; Surface potentials ; Surface Properties ; Surface Tension ; Surface-Active Agents - chemistry ; Water - chemistry</subject><ispartof>Journal of colloid and interface science, 2004-11, Vol.279 (2), p.552-558</ispartof><rights>2004</rights><rights>2005 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c448t-152febf06a65d1a4301b87b4f0dd30744e4ed0c7d9604724524efd08fe40af203</citedby><cites>FETCH-LOGICAL-c448t-152febf06a65d1a4301b87b4f0dd30744e4ed0c7d9604724524efd08fe40af203</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.jcis.2004.06.080$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3536,27903,27904,45974</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=16253697$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/15464824$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Broniatowski, M.</creatorcontrib><creatorcontrib>Miñones, J.</creatorcontrib><creatorcontrib>Dynarowicz-Łątka, P.</creatorcontrib><title>Semifluorinated chains in 2D-(perfluorododecyl)-alkanes at the air/water interface</title><title>Journal of colloid and interface science</title><addtitle>J Colloid Interface Sci</addtitle><description>Langmuir monolayers of a homologous series of perfluorododecyl-
n-alkanes (general formula F(CF
2)
12(CH
2)
n
H, abbreviated as F12H
n, where
n
=
6
–
20
) are investigated through isotherms of surface pressure (
π) and electric surface potential (Δ
V) versus area (
A) and quantitative Brewster angle microscopy. The investigated monolayers are found to be liquid in nature. The negative sign of the measured surface potential evidences the orientation of all the investigated molecules with their perfluorinated parts directed toward the air regardless of the length of the hydrogenated unit. Analysis of the direction of the molecular dipole moment with respect to the main axis indicates that the minimum effective dipole moment is achieved for a molecule oriented at an angle of about 35° to the surface normal. The film thickness was evaluated from the relative intensity measurements. The results suggest that the F12H
n molecules are tilted to the interface in the vicinity of collapse, which is in accordance with the liquid character of their monolayers.</description><subject>Air</subject><subject>Air/water interface</subject><subject>Alkanes - chemistry</subject><subject>Brewster angle microscopy</subject><subject>Chemistry</subject><subject>Effective dipole moments</subject><subject>Exact sciences and technology</subject><subject>Fluorocarbons - chemistry</subject><subject>General and physical chemistry</subject><subject>Langmuir monolayers</subject><subject>Phase Transition</subject><subject>Semifluorinated alkanes</subject><subject>Surface potentials</subject><subject>Surface Properties</subject><subject>Surface Tension</subject><subject>Surface-Active Agents - chemistry</subject><subject>Water - chemistry</subject><issn>0021-9797</issn><issn>1095-7103</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2004</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp9kMtOwzAQRS0EgvL4ARYoGxAsko5d20kkNoi3VAmJx9py7bFwSZNipyD-HpdWsGPjWfjcO6NDyCGFggKVw2kxNT4WDIAXIAuoYIMMKNQiLymMNskAgNG8Lutyh-zGOAWgVIh6m-xQwSWvGB-QxyecedcsuuBb3aPNzKv2bcx8m7Gr_HSO4eezs51F89Wc5bp50y3GTPdZ_4qZ9mH4mYIhJdLrtMF9suV0E_FgPffIy8318-VdPn64vb-8GOeG86rPqWAOJw6klsJSzUdAJ1U54Q6sHUHJOXK0YEpbS-Al44JxdBYqhxy0YzDaIyer3nno3hcYezXz0WDTpPu6RVRS1gIEEwlkK9CELsaATs2Dn-nwpSiopUk1VUuTamlSgVTJZAodrdsXkxnav8haXQKO14CORjcu6HbZ8cvJtFnWZeLOVxwmFx8eg4rGY2vQ-oCmV7bz_93xDRtpkWU</recordid><startdate>20041115</startdate><enddate>20041115</enddate><creator>Broniatowski, M.</creator><creator>Miñones, J.</creator><creator>Dynarowicz-Łątka, P.</creator><general>Elsevier Inc</general><general>Elsevier</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>20041115</creationdate><title>Semifluorinated chains in 2D-(perfluorododecyl)-alkanes at the air/water interface</title><author>Broniatowski, M. ; Miñones, J. ; Dynarowicz-Łątka, P.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c448t-152febf06a65d1a4301b87b4f0dd30744e4ed0c7d9604724524efd08fe40af203</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2004</creationdate><topic>Air</topic><topic>Air/water interface</topic><topic>Alkanes - chemistry</topic><topic>Brewster angle microscopy</topic><topic>Chemistry</topic><topic>Effective dipole moments</topic><topic>Exact sciences and technology</topic><topic>Fluorocarbons - chemistry</topic><topic>General and physical chemistry</topic><topic>Langmuir monolayers</topic><topic>Phase Transition</topic><topic>Semifluorinated alkanes</topic><topic>Surface potentials</topic><topic>Surface Properties</topic><topic>Surface Tension</topic><topic>Surface-Active Agents - chemistry</topic><topic>Water - chemistry</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Broniatowski, M.</creatorcontrib><creatorcontrib>Miñones, J.</creatorcontrib><creatorcontrib>Dynarowicz-Łątka, P.</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Journal of colloid and interface science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Broniatowski, M.</au><au>Miñones, J.</au><au>Dynarowicz-Łątka, P.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Semifluorinated chains in 2D-(perfluorododecyl)-alkanes at the air/water interface</atitle><jtitle>Journal of colloid and interface science</jtitle><addtitle>J Colloid Interface Sci</addtitle><date>2004-11-15</date><risdate>2004</risdate><volume>279</volume><issue>2</issue><spage>552</spage><epage>558</epage><pages>552-558</pages><issn>0021-9797</issn><eissn>1095-7103</eissn><coden>JCISA5</coden><abstract>Langmuir monolayers of a homologous series of perfluorododecyl-
n-alkanes (general formula F(CF
2)
12(CH
2)
n
H, abbreviated as F12H
n, where
n
=
6
–
20
) are investigated through isotherms of surface pressure (
π) and electric surface potential (Δ
V) versus area (
A) and quantitative Brewster angle microscopy. The investigated monolayers are found to be liquid in nature. The negative sign of the measured surface potential evidences the orientation of all the investigated molecules with their perfluorinated parts directed toward the air regardless of the length of the hydrogenated unit. Analysis of the direction of the molecular dipole moment with respect to the main axis indicates that the minimum effective dipole moment is achieved for a molecule oriented at an angle of about 35° to the surface normal. The film thickness was evaluated from the relative intensity measurements. The results suggest that the F12H
n molecules are tilted to the interface in the vicinity of collapse, which is in accordance with the liquid character of their monolayers.</abstract><cop>San Diego, CA</cop><pub>Elsevier Inc</pub><pmid>15464824</pmid><doi>10.1016/j.jcis.2004.06.080</doi><tpages>7</tpages></addata></record> |
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language | eng |
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source | MEDLINE; Elsevier ScienceDirect Journals |
subjects | Air Air/water interface Alkanes - chemistry Brewster angle microscopy Chemistry Effective dipole moments Exact sciences and technology Fluorocarbons - chemistry General and physical chemistry Langmuir monolayers Phase Transition Semifluorinated alkanes Surface potentials Surface Properties Surface Tension Surface-Active Agents - chemistry Water - chemistry |
title | Semifluorinated chains in 2D-(perfluorododecyl)-alkanes at the air/water interface |
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