Ultrafast dynamics of ionic liquids in colloidal dispersion
Ionic liquid (IL)-surfactant complexes have significance both in applications and fundamental research, but their underlying dynamics are not well understood. We apply polarization-controlled two-dimensional infrared spectroscopy (2D-IR) to study the dynamics of [BMIM][SCN]/surfactant/solvent model...
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| Veröffentlicht in: | Physical chemistry chemical physics : PCCP 2017-12, Vol.19 (48), p.32526-32535 |
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| creator | Ren, Zhe Kelly, Jordan Gunathilaka, C. Prasad Brinzer, Thomas Dutta, Samrat Johnson, Clinton A Mitra, Sunayana Garrett-Roe, Sean |
| description | Ionic liquid (IL)-surfactant complexes have significance both in applications and fundamental research, but their underlying dynamics are not well understood. We apply polarization-controlled two-dimensional infrared spectroscopy (2D-IR) to study the dynamics of [BMIM][SCN]/surfactant/solvent model systems. We examine the effect of the choice of surfactants and solvent, and the IL-to-surfactant ratio (
W
-value), with a detailed analysis of the orientation and structural dynamics of each system. Different surfactants create very different environments for the entrapped ILs, ranging from a semi-static micro-environment to a fluxional environment that evolves even faster than the bulk IL. The oil-phase also clearly affects the microscopic dynamics. The anisotropy decay for entrapped ILs completes within 10 ps, which is similar to free thiocyanate ion in water, while a significant reorientation-induced spectral diffusion (RISD) effect is observed. The entrapped ionic liquid are highly dynamic for all
W
-values, and no core-shell structure is observed. We hypothesize that, instead of an ionic liquid-reverse micelle (IL-RM), the microscopic structure of this system is small colloidal dispersions or pairs of IL and surfactants. A detailed analysis of the polarization-controlled 2D-IR spectra of AOT system reveals a potential ion-exchange mechanism.
The dynamics of [BMIM][SCN] microemulsions depend on the surfactant, size, and the oil-phase. |
| doi_str_mv | 10.1039/c7cp04441k |
| format | Article |
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W
-value), with a detailed analysis of the orientation and structural dynamics of each system. Different surfactants create very different environments for the entrapped ILs, ranging from a semi-static micro-environment to a fluxional environment that evolves even faster than the bulk IL. The oil-phase also clearly affects the microscopic dynamics. The anisotropy decay for entrapped ILs completes within 10 ps, which is similar to free thiocyanate ion in water, while a significant reorientation-induced spectral diffusion (RISD) effect is observed. The entrapped ionic liquid are highly dynamic for all
W
-values, and no core-shell structure is observed. We hypothesize that, instead of an ionic liquid-reverse micelle (IL-RM), the microscopic structure of this system is small colloidal dispersions or pairs of IL and surfactants. A detailed analysis of the polarization-controlled 2D-IR spectra of AOT system reveals a potential ion-exchange mechanism.
The dynamics of [BMIM][SCN] microemulsions depend on the surfactant, size, and the oil-phase.</description><identifier>ISSN: 1463-9076</identifier><identifier>EISSN: 1463-9084</identifier><identifier>DOI: 10.1039/c7cp04441k</identifier><identifier>PMID: 29188825</identifier><language>eng</language><publisher>England: Royal Society of Chemistry</publisher><subject>Diffusion effects ; Dynamic structural analysis ; Dynamics ; Infrared spectroscopy ; Ionic liquids ; Ions ; Polarization ; Reverse micelles ; Spectrum analysis ; Surfactants ; Two dimensional analysis ; Two dimensional models</subject><ispartof>Physical chemistry chemical physics : PCCP, 2017-12, Vol.19 (48), p.32526-32535</ispartof><rights>Copyright Royal Society of Chemistry 2017</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c378t-33c0e6c64f3749ea58df5187648695aad0700022d94a5418e139317ca779665b3</citedby><cites>FETCH-LOGICAL-c378t-33c0e6c64f3749ea58df5187648695aad0700022d94a5418e139317ca779665b3</cites><orcidid>0000-0003-4282-7674 ; 0000-0002-4141-9495 ; 0000-0001-6199-8773 ; 0000-0002-0825-8589 ; 0000-0001-7793-1581 ; 0000-0002-4167-391X</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27923,27924</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/29188825$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Ren, Zhe</creatorcontrib><creatorcontrib>Kelly, Jordan</creatorcontrib><creatorcontrib>Gunathilaka, C. Prasad</creatorcontrib><creatorcontrib>Brinzer, Thomas</creatorcontrib><creatorcontrib>Dutta, Samrat</creatorcontrib><creatorcontrib>Johnson, Clinton A</creatorcontrib><creatorcontrib>Mitra, Sunayana</creatorcontrib><creatorcontrib>Garrett-Roe, Sean</creatorcontrib><title>Ultrafast dynamics of ionic liquids in colloidal dispersion</title><title>Physical chemistry chemical physics : PCCP</title><addtitle>Phys Chem Chem Phys</addtitle><description>Ionic liquid (IL)-surfactant complexes have significance both in applications and fundamental research, but their underlying dynamics are not well understood. We apply polarization-controlled two-dimensional infrared spectroscopy (2D-IR) to study the dynamics of [BMIM][SCN]/surfactant/solvent model systems. We examine the effect of the choice of surfactants and solvent, and the IL-to-surfactant ratio (
W
-value), with a detailed analysis of the orientation and structural dynamics of each system. Different surfactants create very different environments for the entrapped ILs, ranging from a semi-static micro-environment to a fluxional environment that evolves even faster than the bulk IL. The oil-phase also clearly affects the microscopic dynamics. The anisotropy decay for entrapped ILs completes within 10 ps, which is similar to free thiocyanate ion in water, while a significant reorientation-induced spectral diffusion (RISD) effect is observed. The entrapped ionic liquid are highly dynamic for all
W
-values, and no core-shell structure is observed. We hypothesize that, instead of an ionic liquid-reverse micelle (IL-RM), the microscopic structure of this system is small colloidal dispersions or pairs of IL and surfactants. A detailed analysis of the polarization-controlled 2D-IR spectra of AOT system reveals a potential ion-exchange mechanism.
The dynamics of [BMIM][SCN] microemulsions depend on the surfactant, size, and the oil-phase.</description><subject>Diffusion effects</subject><subject>Dynamic structural analysis</subject><subject>Dynamics</subject><subject>Infrared spectroscopy</subject><subject>Ionic liquids</subject><subject>Ions</subject><subject>Polarization</subject><subject>Reverse micelles</subject><subject>Spectrum analysis</subject><subject>Surfactants</subject><subject>Two dimensional analysis</subject><subject>Two dimensional models</subject><issn>1463-9076</issn><issn>1463-9084</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNpd0U1LxDAQBuAgiruuXrwrBS8iVJPmG09S_MIFPbjnkk1SyJo2NWkP---t7rqCpxmYh2F4B4BTBK8RxPJGc91BQgj62ANTRBjOJRRkf9dzNgFHKa0ghIgifAgmhURCiIJOwe3C91HVKvWZWbeqcTploc5caJ3OvPscnEmZazMdvA_OKJ8Zlzob0yiOwUGtfLIn2zoDi4f79_Ipn78-Ppd381xjLvocYw0t04zUmBNpFRWmpkhwRgSTVCkD-XhZURhJFCVIWIQlRlwrziVjdIln4HKzt4vhc7CprxqXtPVetTYMqUKSQ4YpxMVIL_7RVRhiO15XFRBBQQsmxaiuNkrHkFK0ddVF16i4rhCsviOtSl6-_UT6MuLz7cph2Vizo78ZjuBsA2LSu-nfT_AXxW54dA</recordid><startdate>20171213</startdate><enddate>20171213</enddate><creator>Ren, Zhe</creator><creator>Kelly, Jordan</creator><creator>Gunathilaka, C. 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Prasad</creatorcontrib><creatorcontrib>Brinzer, Thomas</creatorcontrib><creatorcontrib>Dutta, Samrat</creatorcontrib><creatorcontrib>Johnson, Clinton A</creatorcontrib><creatorcontrib>Mitra, Sunayana</creatorcontrib><creatorcontrib>Garrett-Roe, Sean</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>MEDLINE - Academic</collection><jtitle>Physical chemistry chemical physics : PCCP</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ren, Zhe</au><au>Kelly, Jordan</au><au>Gunathilaka, C. Prasad</au><au>Brinzer, Thomas</au><au>Dutta, Samrat</au><au>Johnson, Clinton A</au><au>Mitra, Sunayana</au><au>Garrett-Roe, Sean</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Ultrafast dynamics of ionic liquids in colloidal dispersion</atitle><jtitle>Physical chemistry chemical physics : PCCP</jtitle><addtitle>Phys Chem Chem Phys</addtitle><date>2017-12-13</date><risdate>2017</risdate><volume>19</volume><issue>48</issue><spage>32526</spage><epage>32535</epage><pages>32526-32535</pages><issn>1463-9076</issn><eissn>1463-9084</eissn><abstract>Ionic liquid (IL)-surfactant complexes have significance both in applications and fundamental research, but their underlying dynamics are not well understood. We apply polarization-controlled two-dimensional infrared spectroscopy (2D-IR) to study the dynamics of [BMIM][SCN]/surfactant/solvent model systems. We examine the effect of the choice of surfactants and solvent, and the IL-to-surfactant ratio (
W
-value), with a detailed analysis of the orientation and structural dynamics of each system. Different surfactants create very different environments for the entrapped ILs, ranging from a semi-static micro-environment to a fluxional environment that evolves even faster than the bulk IL. The oil-phase also clearly affects the microscopic dynamics. The anisotropy decay for entrapped ILs completes within 10 ps, which is similar to free thiocyanate ion in water, while a significant reorientation-induced spectral diffusion (RISD) effect is observed. The entrapped ionic liquid are highly dynamic for all
W
-values, and no core-shell structure is observed. We hypothesize that, instead of an ionic liquid-reverse micelle (IL-RM), the microscopic structure of this system is small colloidal dispersions or pairs of IL and surfactants. A detailed analysis of the polarization-controlled 2D-IR spectra of AOT system reveals a potential ion-exchange mechanism.
The dynamics of [BMIM][SCN] microemulsions depend on the surfactant, size, and the oil-phase.</abstract><cop>England</cop><pub>Royal Society of Chemistry</pub><pmid>29188825</pmid><doi>10.1039/c7cp04441k</doi><tpages>1</tpages><orcidid>https://orcid.org/0000-0003-4282-7674</orcidid><orcidid>https://orcid.org/0000-0002-4141-9495</orcidid><orcidid>https://orcid.org/0000-0001-6199-8773</orcidid><orcidid>https://orcid.org/0000-0002-0825-8589</orcidid><orcidid>https://orcid.org/0000-0001-7793-1581</orcidid><orcidid>https://orcid.org/0000-0002-4167-391X</orcidid></addata></record> |
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| source | Royal Society Of Chemistry Journals 2008-; Alma/SFX Local Collection |
| subjects | Diffusion effects Dynamic structural analysis Dynamics Infrared spectroscopy Ionic liquids Ions Polarization Reverse micelles Spectrum analysis Surfactants Two dimensional analysis Two dimensional models |
| title | Ultrafast dynamics of ionic liquids in colloidal dispersion |
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