1
|
|
2
|
Vincent M, Gallay J. Water gradient in the membrane-water interface: a time-resolved study of the series of n-(9-anthroyloxy) stearic acids incorporated in AOT/water/iso-octane reverse micelles. J Phys Chem B 2012; 116:1687-99. [PMID: 22233168 DOI: 10.1021/jp209419y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The water radial distribution in AOT/iso-octane/water reverse micelles (RM), used to mimic the membrane-water interface, was examined by excited-state lifetime and transient spectral measurements of the series of n-(9-anthroyloxy) stearic acids (n-AS), with n = 2, 3, 6, 7, 9, 10, and 12. A water gradient in the RM extended from the polar head group region up to the middle of the surfactant carbon chains. A fast intramolecular excited-state relaxation, involving the rotation of the carboxylic group of the ester bond with respect to the anthracene ring, gave rise to a nanosecond time-dependent fluorescence Stokes shifts (TDFSS). In water-filled RMs, we only observed a water-induced TDFSS occurring over subnano- and nanosecond time scales with decreasing amplitudes and rates as a function of depth, according to the decreasing water gradient and the slowing down of the anthroyloxy moiety rotational motion. This water-induced TDFSS is most likely the result of both H-bond formation and general dipolar relaxation, as indirectly showed by measurements with DMF (a nonprotic polar solvent) instead of water in RMs.
Collapse
Affiliation(s)
- Michel Vincent
- Institut de Biochimie et de Biophysique Moléculaire et Cellulaire, Université Paris-Sud, UMR 8619-CNRS, F-91405 Orsay, France.
| | | |
Collapse
|
3
|
Perera JM, Stevens GW. Spectroscopic studies of molecular interaction at the liquid–liquid interface. Anal Bioanal Chem 2009; 395:1019-32. [DOI: 10.1007/s00216-009-2855-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2009] [Revised: 05/11/2009] [Accepted: 05/12/2009] [Indexed: 10/20/2022]
|
4
|
Solvation dynamics of a surfactant probe in mesostructured silica-surfactant nanocomposites. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2008.12.032] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
5
|
|
6
|
Yamaguchi A, Kamijo T, Teramae N. Characterization of the Inner Space of Mesostructured Silica by Time-Resolved Fluorescence Spectroscopy. BUNSEKI KAGAKU 2009. [DOI: 10.2116/bunsekikagaku.58.507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Akira Yamaguchi
- Department of Chemistry, Graduate School of Science, Tohoku University
| | - Toshio Kamijo
- Department of Chemistry, Graduate School of Science, Tohoku University
| | - Norio Teramae
- Department of Chemistry, Graduate School of Science, Tohoku University
| |
Collapse
|
7
|
Kamijo T, Yamaguchi A, Suzuki S, Teramae N, Itoh T, Ikeda T. Solvation Dynamics of Coumarin 153 in Alcohols Confined in Silica Nanochannels. J Phys Chem A 2008; 112:11535-42. [DOI: 10.1021/jp8034743] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Toshio Kamijo
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan, and Research Center for Compact Chemical Process, National Institute of Advanced Industrial Science and Technology (AIST), Nigatake 4-2-1, Miyagino-ku, Sendai 983-8551, Japan
| | - Akira Yamaguchi
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan, and Research Center for Compact Chemical Process, National Institute of Advanced Industrial Science and Technology (AIST), Nigatake 4-2-1, Miyagino-ku, Sendai 983-8551, Japan
| | - Shintaro Suzuki
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan, and Research Center for Compact Chemical Process, National Institute of Advanced Industrial Science and Technology (AIST), Nigatake 4-2-1, Miyagino-ku, Sendai 983-8551, Japan
| | - Norio Teramae
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan, and Research Center for Compact Chemical Process, National Institute of Advanced Industrial Science and Technology (AIST), Nigatake 4-2-1, Miyagino-ku, Sendai 983-8551, Japan
| | - Tetsuji Itoh
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan, and Research Center for Compact Chemical Process, National Institute of Advanced Industrial Science and Technology (AIST), Nigatake 4-2-1, Miyagino-ku, Sendai 983-8551, Japan
| | - Takuji Ikeda
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan, and Research Center for Compact Chemical Process, National Institute of Advanced Industrial Science and Technology (AIST), Nigatake 4-2-1, Miyagino-ku, Sendai 983-8551, Japan
| |
Collapse
|
8
|
Ma JY, Wang JB, Li XY, Huang Y, Zhu Q, Fu KX. A study on orientation and absorption spectrum of interfacial molecules by using continuum model. J Comput Chem 2008; 29:198-210. [PMID: 17557282 DOI: 10.1002/jcc.20773] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
In this work, a numerical procedure based on the continuum model is developed and applied to the solvation energy for ground state and the spectral shift against the position and the orientation of the interfacial molecule. The interface is described as a sharp boundary separating two bulk media. The polarizable continuum model (PCM) allows us to account for both electrostatic and nonelectrostatic solute-solvent interactions when we calculate the solvation energy. In this work we extend PCM to the interfacial system and the information about the position and orientation of the interfacial molecule can be obtained. Based on the developed expression of the electrostatic free energy of a nonequilibrium state, the numerical procedure has been implemented and used to deal with a series of test molecules. The time-dependent density functional theory (TDDFT) associated with PCM is used for the electron structure and the spectroscopy calculations of the test molecules in homogeneous solvents. With the charge distribution of the ground and excited states, the position- and orientation-dependencies of the solvation energy and the spectrum have been investigated for the interfacial systems, taking the electrostatic interaction, the cavitation energy, and the dispersion-repulsion interaction into account. The cavitation energy is paid particular attention, since the interface portion cut off by the occupation of the interfacial molecule contributes an extra part to the stabilization for the interfacial system. The embedding depth, the favorable orientational angle, and the spectral shift for the interfacial molecule have been investigated in detail. From the solvation energy calculations, an explanation has been given on why the interfacial molecule, even if symmetrical in structure, tends to take a tilting manner, rather than perpendicular to the interface.
Collapse
Affiliation(s)
- Jian-Yi Ma
- College of Chemical Engineering, Sichuan University, Chengdu 610065, People's Republic of China
| | | | | | | | | | | |
Collapse
|
9
|
Yamaguchi A, Amino Y, Shima K, Suzuki S, Yamashita T, Teramae N. Local environments of coumarin dyes within mesostructured silica-surfactant nanocomposites. J Phys Chem B 2007; 110:3910-6. [PMID: 16509675 DOI: 10.1021/jp0564086] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The local environments surrounding dye molecules were studied with use of coumarin dyes in a mesostructured silica-surfactant nanocomposite, which was formed in a porous alumina membrane by a surfactant-templated method and has an average pore diameter of 3.4 nm. Coumarin dyes, such as coumarin 480 (C480), coumarin 343 (C343), and propylamide coumarin 343 (PAC343), were extracted into the silica-surfactant nanocomposite and time-resolved fluorescence spectra of these dyes were examined. C480 and C343 show slow dynamic Stokes shifts and the decay curve can be fitted by a biexponential function. The decay-time constants obtained from the fitting are almost identical for C480 and C343: 0.87 and 7.5 ns for C480, and 0.86 and 7.6 ns for C343. In contrast to these two coumarin dyes, short decay-time constants (0.50 and 4.8 ns) were obtained for PAC343 in the silica-surfactant nanocomposite. These results indicate that the local environments of C480 and C343 are almost identical but different from that of PAC343. By considering the origin of the dynamic Stokes shift and the mesostructure of the silica-surfactant nanocomposite, the location and microenvironment of coumarin dyes within the silica-surfactant nanocomposite are discussed.
Collapse
Affiliation(s)
- Akira Yamaguchi
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
| | | | | | | | | | | |
Collapse
|
10
|
Yamashita T, Kodama S, Ohto M, Nakayama E, Takayanagi N, Kemmei T, Yamaguchi A, Teramae N, Saito Y. Use of porous anodic alumina membranes as a nanometre-diameter column for high performance liquid chromatography. Chem Commun (Camb) 2007:1160-2. [PMID: 17347725 DOI: 10.1039/b615369k] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The possibility of using porous anodic alumina membranes as a column for normal-phase high performance liquid chromatography was evaluated using phenol and toluene with mobile phases having different solvent compositions.
Collapse
Affiliation(s)
- Tomohisa Yamashita
- Toyama Institute of Health, 17-1 Nakataikoyama, Imizu, Toyama 939-0363, Japan.
| | | | | | | | | | | | | | | | | |
Collapse
|
11
|
Affiliation(s)
- Ilan Benjamin
- Department of Chemistry, University of California, Santa Cruz, California 95064, USA
| |
Collapse
|
12
|
Tsukahara S. Recent analytical methodologies on equilibrium, kinetics, and dynamics at liquid/liquid interface. Anal Chim Acta 2006; 556:16-25. [PMID: 17723327 DOI: 10.1016/j.aca.2005.05.050] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2005] [Accepted: 05/19/2005] [Indexed: 12/01/2022]
Abstract
The form of liquid/liquid interface is flexible and it cannot be fixed at a spatial position. Also the interface is prevented from any physical contact by the organic phase and aqueous phase. In addition, analytical methods operated in vacuo cannot be applied. These restrictions depressed the development of liquid/liquid interfacial chemistry. However, the modification of liquid/liquid interfacial form and original analytical methods have been invented interdependently. The present review classifies the forms of liquid/liquid interface first, and it arrays the related analytical methods with brief explanations. It dominantly deals with recent reports of analytical methodologies, which were published in 2001-2004, on equilibrium, kinetics, and dynamics of substances at liquid/liquid interface, but it also includes historically important studies.
Collapse
Affiliation(s)
- Satoshi Tsukahara
- Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan.
| |
Collapse
|
13
|
De Serio M, Mohapatra H, Zenobi R, Deckert V. Investigation of the liquid–liquid interface with high spatial resolution using near-field Raman spectroscopy. Chem Phys Lett 2006. [DOI: 10.1016/j.cplett.2005.10.082] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
14
|
Kim DH, Lee JA, Son SU, Chung YK, Choi CH. Synthesis and photoluminescence study of benz[f]indene derivatives. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.04.128] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
15
|
Yamashita T, Amino Y, Yamaguchi A, Teramae N. Solvation Dynamics at the Water/Mica Interface as Studied by Time-resolved Fluorescence Spectroscopy. CHEM LETT 2005. [DOI: 10.1246/cl.2005.988] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
16
|
Negishi T, Nakatani K. Kinetic Analysis of Ion Pair Extraction of an Alkyl Sulfate Anion across a Liquid/Liquid Interface by Fluorescence Microspectroscopy and Microelectrochemistry of Single Microdroplets. Anal Chem 2005; 77:1807-12. [PMID: 15762589 DOI: 10.1021/ac048662k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Mass transfer of an alkyl sulfate anion with a (ferrocenylmethyl)trimethylammonium cation from water into single oil microdroplets was kinetically studied by microcapillary injection, fluorescence microspectroscopy, and microelectrochemistry. The partitioning ratio and the extraction rate significantly depended on the alkyl chain length of the alkyl sulfate anion. The extraction rate for the n-dodecyl sulfate or n-tridecyl sulfate ion was proportional to both the alkyl sulfate ion and ferrocene derivative concentrations while that for the n-undecyl sulfate ion was proportional to the anion concentration alone. The results are discussed in terms of transfer of the individual ions across the microdroplet/water interface and adsorption/ion pair formation of the alkyl sulfate ion at the microdroplet/water interface.
Collapse
Affiliation(s)
- Takayuki Negishi
- Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Ibaraki 305-8571, Japan
| | | |
Collapse
|
17
|
Pant D, Girault HH. Time-resolved total internal reflection fluorescence spectroscopy : Part I. Photophysics of Coumarin 343 at liquid/liquid interface. Phys Chem Chem Phys 2005; 7:3457-63. [PMID: 16273146 DOI: 10.1039/b507830j] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Pico-second time-resolved time-correlated single photon counting (TCSPC) technique under the total internal reflection (TIR) condition has been used to study the photophysical properties of Coumarin 343 (C343) dye molecules adsorbed at the water/1,2-dichloroethane (DCE) interface. The fluorescence decay profile of C343 under TIR condition at the water/DCE interface was non-exponential and fitted to the double exponential decay function with the fluorescence lifetimes 0.3 and 3.6 ns, which proved the existence of two different forms of C343 species having largely different lifetimes at the interface. The longer fluorescence lifetime component of C343 at the interface is attributed to the emission from the monomeric form of the dye molecules and the shorter lifetime component is due to the aggregation of dye molecules. The penetration depth dependence of decay curves indicated no change in the fluorescence lifetime components, however, the amplitude corresponding to the lifetime of aggregate increased and the amplitude corresponding to the lifetime of monomer decreased with the decrease in penetration depth of the aqueous phase from the interface. Aggregation is significant in the interfacial layer. The decrease in monomer lifetime at the interface compared to that in the bulk solution is interpreted in terms of excitation energy migration between the dye molecules.
Collapse
Affiliation(s)
- Debi Pant
- Laboratoire d'Electrochimie, Ecole Polytechnique Fédérale de Lausanne, CH-1015, Lausanne, Switzerland
| | | |
Collapse
|
18
|
Yamaguchi A, Uchida T, Nochi K, Yamashita T, Teramae N. Adsorption behavior of lauric acid at heptane/water interface as studied by second harmonic generation spectroscopy and interfacial tensiometry. ANAL SCI 2004; 20:1523-7. [PMID: 15566143 DOI: 10.2116/analsci.20.1523] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Interfacial tensiometry and second harmonic generation (SHG) spectroscopy were applied to examine the adsorption behavior of lauric acid (LA) at a heptane/water interface. From interfacial tensiometry measurements, the adsorption kinetics of LA was revealed to be diffusion-controlled, and the adsorption constant of LA was estimated to be 9.6 x 10(4) M(-1). The adsorption isotherms obtained by SHG measurements were analyzed by taking account of both the molecular orientation of LA at the interface and a surface electric field generated by the adsorbed LA layer. It was confirmed that the carboxylic groups of adsorbed LA molecules were well ordered at the heptane/water interface and the orientation of the carboxylate group was invariant during the adsorption process.
Collapse
Affiliation(s)
- Akira Yamaguchi
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
| | | | | | | | | |
Collapse
|
19
|
Thiourea–isothiouronium conjugate for strong and selective binding of very hydrophilic H2PO4− anion at the 1,2-dichloroethane–water interface. Tetrahedron Lett 2004. [DOI: 10.1016/j.tetlet.2004.04.001] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
20
|
Nishizawa S, Kamaishi T, Yokobori T, Kato R, Cui YY, Shioya T, Teramae N. Facilitated Sulfate Transfer across the Nitrobenzene-Water Interface as Mediated by Hydrogen-Bonding Ionophores. ANAL SCI 2004; 20:1559-65. [PMID: 15566150 DOI: 10.2116/analsci.20.1559] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Facilitated SO4(2-) transfers by hydrogen bond-forming ionophores are investigated across the nitrobenzene (NB)-water interface by using polarography with a dropping electrolyte electrode. Bis-thiourea 1, alpha,alpha'-bis(N'-p-nitrophenylthioureylene)-m-xylene, is found to significantly facilitate the transfer of the highly hydrophilic SO4(2-) whereas its counterpart, N-(p-nitrophenyl)-N'-propylthiourea (ionophore 2), cannot. In contrast to the predominant formation of a 1:1 complex with SO4(2-) in the bulk NB phase, the SO4(2-) transfer assisted by 1 is indeed based on the formation of a 1:2 complex between SO4(2-) and ionophore, even under the condition of [SO4(2-)]aq >> [1]org. Such an exclusive formation of the 1:2 (SO4(2-) to ionophore) complex at the NB-water interface is not observed with structurally similar bis-thiourea 3, alpha,alpha'-bis(N'-phenylthioureylene)-m-xylene, where p-nitrophenyl moietes of bis-thiourea 1 are simply replaced by phenyl groups. The facilitated transfer of SO4(2-) with bis-thiourea 1 is further compared to that of HPO4(2-) and H2PO4- across the NB-water interface, which was previously shown to be assisted by 1 through the formation of the 1:1 and 2:1 (anion to ionophore) complexes, respectively. On the basis of these examinations, unique binding behaviors of hydrogen bond-forming ionophores at the NB-water interface are discussed, with a view towards development of ionophore-based anion-selective chemical sensors.
Collapse
Affiliation(s)
- Seiichi Nishizawa
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
| | | | | | | | | | | | | |
Collapse
|