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Imai Y, Tokiwa Y, Ueno S, Tanida H, Watanabe I, Matsubara H, Takiue T, Aratono M. Effect of the Headgroup Structure on Counterion Binding in Adsorbed Surfactant Films Investigated by Total Reflection X-ray Absorption Fine Structure Spectroscopy. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2018. [DOI: 10.1246/bcsj.20180167] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Yosuke Imai
- Division for Experimental Nature Science, Faculty of Arts and Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Yuhei Tokiwa
- Department of Chemistry, Faculty of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Shusaku Ueno
- Department of Chemistry, Faculty of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Hajime Tanida
- Materials Sciences Research Center, Sector of Nuclear Science Research, Japan Atomic Energy Agency, 1-1-1 Koto, Sayo, Hyogo 679-5148, Japan
| | - Iwao Watanabe
- Office of Society-Academia Collaboration for Innovation, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - Hiroki Matsubara
- Department of Chemistry, Faculty of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Takanori Takiue
- Division for Experimental Nature Science, Faculty of Arts and Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Makoto Aratono
- Department of Chemistry, Faculty of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
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Kaur R, Gupta S, Mehta SK, Imai Y, Takiue T, Matsubara H, Aratono M. Probing the self-aggregation behavior and counter ion distribution of a copper surfactant complex. NEW J CHEM 2014. [DOI: 10.1039/c4nj00620h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The aggregation behavior of the metallosurfactant is pointing towards negative adsorption of metal ions at the micelle surface and surface adsorbed film.
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Affiliation(s)
- Ravneet Kaur
- Department of Chemistry & Centre of Advanced Studies in Chemistry
- Panjab University
- Chandigarh – 160 014, India
| | - Sakshi Gupta
- Department of Chemistry & Centre of Advanced Studies in Chemistry
- Panjab University
- Chandigarh – 160 014, India
| | - Surinder K. Mehta
- Department of Chemistry & Centre of Advanced Studies in Chemistry
- Panjab University
- Chandigarh – 160 014, India
| | - Yosuke Imai
- Department of Chemistry
- Faculty of Sciences
- Kyushu University
- Fukuoka 812-8581, Japan
| | - Takanori Takiue
- Department of Chemistry
- Faculty of Sciences
- Kyushu University
- Fukuoka 812-8581, Japan
| | - Hiroki Matsubara
- Department of Chemistry
- Faculty of Sciences
- Kyushu University
- Fukuoka 812-8581, Japan
| | - Makoto Aratono
- Department of Chemistry
- Faculty of Sciences
- Kyushu University
- Fukuoka 812-8581, Japan
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Imai Y, Li H, Takumi H, Tanida H, Watanabe I, Takiue T, Matsubara H, Aratono M. Study on the distribution of binary mixed counterions in surfactant adsorbed films by total reflection XAFS measurements. J Colloid Interface Sci 2012; 388:219-24. [DOI: 10.1016/j.jcis.2012.08.044] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2012] [Revised: 08/20/2012] [Accepted: 08/21/2012] [Indexed: 11/26/2022]
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Li H, Imai Y, Yamanaka M, Hayami Y, Takiue T, Matsubara H, Aratono M. Specific counterion effect on the adsorbed film of cationic surfactant mixtures at the air/water interface. J Colloid Interface Sci 2011; 359:189-93. [DOI: 10.1016/j.jcis.2011.03.082] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2010] [Revised: 03/26/2011] [Accepted: 03/29/2011] [Indexed: 11/15/2022]
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Shimamoto K, Onohara A, Takumi H, Watanabe I, Tanida H, Matsubara H, Takiue T, Aratono M. Miscibility and distribution of counterions of imidazolium ionic liquid mixtures at the air/water surface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:9954-9959. [PMID: 19705891 DOI: 10.1021/la901114e] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The miscibility and distribution of Br(-) and BF(4)(-) ions of imidazolium ionic liquid mixtures, 1-hexyl-3-methylimidazolium bromide (HMIMBr) + 1-hexyl-3-methylimidazolium tetrafluoroborate (HMIMBF(4)), at the air/water surface were investigated by surface tensiometry and the total-reflection XAFS (TRXAFS) method. Tensiometry showed that the surface density of BF(4)(-) was much larger than that of Br(-), the adsorbed films of the HMIMBr-HMIMBF(4) mixture were greatly enriched in BF(4)(-) at all surface tensions, and the excess Gibbs energy of adsorption was positive. However, TRXAFS revealed that the Br ions were all in the free-Br state solvated by six water molecules in the mixed adsorbed film. Entropy-originated nonideal mixing, where a kind of segregation of the counterion distribution takes place in the interfacial region, was suggested in the mixture.
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Affiliation(s)
- Kei Shimamoto
- Department of Chemistry, Faculty of Sciences, Kyushu University, Fukuoka 812-8581, Japan
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Okada T, Harada M, Ohki T. Hydration of ions in confined spaces and ion recognition selectivity. ANAL SCI 2009; 25:167-75. [PMID: 19212049 DOI: 10.2116/analsci.25.167] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The hydration of ions in confined spaces, such as the interior of ion-exchange resins, micelles, and surface monolayers, is discussed on the basis of results obtained with X-ray absorption fine structure studies, electrophoresis, and ion-transfer voltammetry. The general trends are that anions are partly dehydrated therein, whereas cations are likely to keep their first hydration shells. For bromide ions, the hydration numbers under various circumstances have been determined. The extents of dehydration depend not only on the structure of the cationic sites electrostatically attracting bromide ions but also on whether the cationic sites are exposed to a solution or are effectively shielded from it. These findings will be useful for designing the systems for ionic recognition and separation.
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Affiliation(s)
- Tetsuo Okada
- Department of Chemistry, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan.
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Bioimaging of cells and tissues using accelerator-based sources. Anal Bioanal Chem 2008; 391:1599-608. [DOI: 10.1007/s00216-008-2157-y] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2007] [Revised: 03/03/2008] [Accepted: 04/22/2008] [Indexed: 10/22/2022]
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Kashimoto K, Shibata K, Matsuda T, Hoshide M, Jimura Y, Watanabe I, Tanida H, Matsubara H, Takiue T, Aratono M. Preferential adsorption of cationic surfactant mixture studied by bromide ion selective total-reflection XAFS measurement. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:6693-6697. [PMID: 18533636 DOI: 10.1021/la800252f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The total-reflection XAFS measurement possessing bromide ion selectivity at the interfacial region was applied to the adsorbed film of hexadecyltrimethylammonium chloride (HTAC) and dodecyltrimethylammonium bromide (DTAB) mixture. The surface compositions XjH of individual ions j ( j = HTA+, Cl(-), DTA+, and Br (-)) were evaluated by combining the surface excess concentration of Br(-) estimated from the XAFS with the surface composition of the respective surfactants from the surface tension results. It is clearly shown that HTA+ and Br(-) are preferentially adsorbed to DTA+ and Cl(-) at the air/water interface. The preferential adsorption was estimated numerically in terms of activity coefficient fi+/-(H,p) of component i and excess Gibbs energy of adsorption ĝprH,E. Then, the magnitude of ĝprH,E was compared with that of ĝprH,E attributable to intrinsic interaction between ions.
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Affiliation(s)
- Kaoru Kashimoto
- Department of Chemistry and Physics of Condensed Matter, Graduate School of Sciences, Kyushu University, Fukuoka 812-8581, Japan.
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ARATONO M, SHIMAMOTO K, ONOHARA A, MURAKAMI D, TANIDA H, WATANABE I, OZEKI T, MATSUBARA H, TAKIUE T. Adsorption of 1-Decyl-3-methylimidazolium Bromide and Solvation Structure of Bromide at the Air/Water Interface. ANAL SCI 2008; 24:1279-83. [DOI: 10.2116/analsci.24.1279] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Makoto ARATONO
- Department of Chemistry, Faculty of Sciences, Kyushu University
| | - Kei SHIMAMOTO
- Department of Chemistry, Faculty of Sciences, Kyushu University
| | - Asuka ONOHARA
- Department of Chemistry, Faculty of Sciences, Kyushu University
| | - Daiki MURAKAMI
- Department of Chemistry, Faculty of Sciences, Kyushu University
| | - Hajime TANIDA
- Experimental Facilities Division, Japan Synchrotron Radiation Research Institute
| | - Iwao WATANABE
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University
| | - Toru OZEKI
- Department of Natural Sciences, Hyogo University of Teacher Education
| | | | - Takanori TAKIUE
- Department of Chemistry, Faculty of Sciences, Kyushu University
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Kashimoto K, Takata Y, Matsuda T, Ikeda N, Matsubara H, Takiue T, Aratono M, Tanida H, Watanabe I. Study on the surface density of surface-active substances through total-reflection X-ray absorption fine structure measurement. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2006; 22:8403-8. [PMID: 16981755 DOI: 10.1021/la0526784] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
The total-reflection X-ray absorption fine structure (XAFS) method previously employed for the adsorption of dodecyltrimethylammonium bromide (DTAB) at the air/water interface was applied to that in the presence of NaBr. The surface concentration of the bromide ions Gamma(X)(B) of DTAB and NaBr was evaluated by using the Br K-edge absorption jump values of the total-reflection XAFS spectra and was compared to the corresponding value Gamma(H)(B) estimated from the dependence of surface tension on the bulk concentrations of DTAB m(1) and NaBr m(2). The Gamma(X)(B) values trace almost perfectly the Gamma(X)(B) versus m(1) curve up to a concentration near the critical micelle concentration (cmc) and deviate gradually above the concentration. This behavior is basically similar to that of the single DTAB system and ensures that the XAFS method is also applicable to the DTAB system, even in the presence of NaBr. In addition, this method was extended to the single nonionic amphiphile with covalently bonded bromine, and the surface concentrations of 6-bromo-1-hexanol (BrC6OH), Gamma(X)(1) and Gamma(H)(B), were evaluated and compared with each other. It was found that the Gamma(X)(1) value almost perfectly traces the Gamma(H)(1) versus m(1) curve, even at high surface concentrations. The excellent coincidence confirmed that the total-reflection XAFS method can be applied to the nonionic amphiphile system as well as a cationic surfactant with or without an added salt system. Finally, the difference between the Gamma(X)(B) and Gamma(H)(B) values observed in the DTAB with and without an added salt system is briefly described.
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Affiliation(s)
- Kaoru Kashimoto
- Department of Chemistry and Physics of Condensed Matter, Graduate School of Sciences, Kyushu University, Fukuoka 812-8581, Japan.
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