1
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Wang Q, Hernesman KS, Steinbock O. Flow‐Driven Precipitation Patterns with Microemulsions in a Confined Geometry. CHEMSYSTEMSCHEM 2019. [DOI: 10.1002/syst.201900037] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Qingpu Wang
- Department of Chemistry and Biochemistry Florida State University Tallahassee, Florida 32306-4390 USA
| | - Keeley S. Hernesman
- Department of Chemistry and Biochemistry Florida State University Tallahassee, Florida 32306-4390 USA
| | - Oliver Steinbock
- Department of Chemistry and Biochemistry Florida State University Tallahassee, Florida 32306-4390 USA
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2
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Zhang Q, Meng P, Wu Y, Zheng R, Wu X, Cheng G. Reversible Strategy of Water Monitoring Aimed at Amphiphilic Pollutants. ACS APPLIED MATERIALS & INTERFACES 2018; 10:3106-3111. [PMID: 29294277 DOI: 10.1021/acsami.7b16186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
For monitoring diverse pollutants in a complicated water environment, the design and development of various detection strategies are necessary. Here, we introduce a general strategy of water monitoring aimed at amphiphilic pollutants using carbon nanotube based film. The pollutants with amphiphilic characteristics can tune the wetting behavior between carbon nanotubes and water molecules, leading to the change in the interface resistance of the carbon nanotube based film. The experimental results demonstrate that the change ratio of the film resistance is related to the concentration of pollutants in solution. This monitoring strategy is general for the detection of amphiphilic materials in mixed solution, such as surfactants and some organic solvent. The ability to achieve a sensitive and repeatable change in film resistance has potential applications in high-sensitivity, real-time, long-lasting, and multiple water monitoring.
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Affiliation(s)
- Quan Zhang
- College of Nuclear Science and Technology, Beijing Normal University , Beijing 100875, China
| | - Peng Meng
- College of Nuclear Science and Technology, Beijing Normal University , Beijing 100875, China
| | - Yulong Wu
- College of Nuclear Science and Technology, Beijing Normal University , Beijing 100875, China
| | - Ruiting Zheng
- College of Nuclear Science and Technology, Beijing Normal University , Beijing 100875, China
| | - Xiaoling Wu
- College of Nuclear Science and Technology, Beijing Normal University , Beijing 100875, China
| | - Guoan Cheng
- College of Nuclear Science and Technology, Beijing Normal University , Beijing 100875, China
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3
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Correa NM, Silber JJ, Riter RE, Levinger NE. Nonaqueous Polar Solvents in Reverse Micelle Systems. Chem Rev 2012; 112:4569-602. [DOI: 10.1021/cr200254q] [Citation(s) in RCA: 204] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- N. Mariano Correa
- Departamento de Química, Universidad Nacional de Río Cuarto, Agencia
Postal #3, C.P. X5804BYA Río Cuarto, Argentina
| | - Juana J. Silber
- Departamento de Química, Universidad Nacional de Río Cuarto, Agencia
Postal #3, C.P. X5804BYA Río Cuarto, Argentina
| | - Ruth E. Riter
- Department of Chemistry, Agnes Scott College, Decatur, Georgia 30030-3770, United
States
| | - Nancy E. Levinger
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872,
United States
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4
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Levinger NE, Costard R, Nibbering ETJ, Elsaesser T. Ultrafast energy migration pathways in self-assembled phospholipids interacting with confined water. J Phys Chem A 2011; 115:11952-9. [PMID: 21928826 DOI: 10.1021/jp206099a] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Phospholipids self-assembled into reverse micelles in benzene are introduced as a new model system to study elementary processes relevant for energy transport in hydrated biological membranes. Femtosecond vibrational spectroscopy gives insight into the dynamics of the antisymmetric phosphate stretching vibration ν(AS)(PO(2))(-), a sensitive probe of local phosphate-water interactions and energy transport. The decay of the ν(AS)(PO(2))(-) mode with a 300-fs lifetime transfers excess energy to a subgroup of phospholipid low-frequency modes, followed by redistribution among phospholipid vibrations within a few picoseconds. The latter relaxation is accelerated by adding a confined water pool, an efficient heat sink in which the excess energy induces weakening or breaking of water-water and water-phospholipid hydrogen bonds. In parallel to vibrational relaxation, resonant energy transfer between ν(AS)(PO(2))(-) oscillators delocalizes the initial excitation.
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Affiliation(s)
- Nancy E Levinger
- Max Born Institut für Nichtlineare Optik und Kurzzeitspektroskopie, D-12489 Berlin, Germany.
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5
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Bakulin AA, Pshenichnikov MS. Reduced coupling of water molecules near the surface of reverse micelles. Phys Chem Chem Phys 2011; 13:19355-61. [PMID: 21959913 DOI: 10.1039/c1cp22235j] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report on vibrational dynamics of water near the surface of AOT reverse micelles studied by narrow-band excitation, mid-IR pump-probe spectroscopy. Evidence of OH-stretch frequency splitting into the symmetric and asymmetric modes is clearly observed for the interfacial H(2)O molecules. The polarization memory of interfacial waters is preserved over an exceptionally extended >10 ps timescale which is a factor of 100 longer than in bulk water. These observations point towards negligibly small intermolecular vibrational coupling between the water molecules as well as strongly reduced water rotational mobility within the interfacial water layer.
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Affiliation(s)
- Artem A Bakulin
- Department of Physical Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
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6
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Sechler TD, DelSole EM, Deák JC. Measuring properties of interfacial and bulk water regions in a reverse micelle with IR spectroscopy: a volumetric analysis of the inhomogeneously broadened OH band. J Colloid Interface Sci 2010; 346:391-7. [PMID: 20371070 DOI: 10.1016/j.jcis.2010.03.014] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2009] [Revised: 03/05/2010] [Accepted: 03/06/2010] [Indexed: 10/19/2022]
Abstract
The water OH stretching band (3000-3600 cm(-1)) was analyzed for absorption contributions from the respective bulk and interfacial water regions of a reverse micelle. This analysis was performed by correlating volume changes of these regions to changes in the OH band absorption as the micelle radius grows. The volumetric analysis is based on the well established expanding core-shell model for AOT reverse micelles and yields the dimensions of the water regions and their individual spectral responses in the OH band. The interfacial shell thickness was determined to be 0.45 nm for AOT reverse micelles in i-octane. It was found that each water region absorbs at most frequencies in the OH band; however, absorption on the red side of the OH band is dominated by bulk water, while absorption on the blue side is dominated by interfacial water. The bulk spectral response was found to be more similar to pure water, while the interfacial spectrum is strongly blue-shifted reflecting the weaker hydrogen bonding in this region. AOT reverse micelles with radii in the range 2-4 nm conformed well to the volumetric model. However, it was found that determination of the bulk water spectral response is particularly sensitive to uncertainty in the micelle radius.
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Affiliation(s)
- Timothy D Sechler
- Department of Chemistry, University of Scranton, Scranton, PA 18510, United States
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7
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Satpati AK, Kumbhakar M, Nath S, Pal H. Influence of Confined Water on the Photophysics of Dissolved Solutes in Reverse Micelles. Chemphyschem 2009; 10:2966-78. [DOI: 10.1002/cphc.200900527] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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8
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Abstract
Recent advances in ultrafast laser technology have spurred investigations of microheterogeneous solutions. In particular, researchers have explored details of reverse micelles (RMs), which present isolated droplets of polar solvent sequestered from a continuous nonpolar phase by a surfactant layer. This review explores recent studies utilizing a variety of ultrafast laser techniques to uncover details about structure and dynamics in various RMs. Using ultrafast vibrational spectroscopy, researchers have probed hydrogen-bond dynamics and vibrational energy relaxation in RMs. These studies have developed our understanding of reverse micellar structure, identifying varying water environments in the RMs. In a plethora of experiments employing probe molecules, researchers have explored the confined environment presented by RMs and their impact on a range of chemical reactions. These studies have shown that confinement, rather than the specific interactions with surfactants, is an important factor determining the impact of the reverse micellar environment on the chemistry.
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Affiliation(s)
- Nancy E Levinger
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, USA.
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9
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Sahoo D, Chakravorti S. Spectra and dynamics of an ionic styryl dye in reverse micelles. J Photochem Photobiol A Chem 2009. [DOI: 10.1016/j.jphotochem.2009.04.018] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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10
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Park S, Moilanen DE, Fayer MD. Water DynamicsThe Effects of Ions and Nanoconfinement. J Phys Chem B 2008; 112:5279-90. [DOI: 10.1021/jp7121856] [Citation(s) in RCA: 161] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sungnam Park
- Department of Chemistry Stanford University, Stanford, California 94305
| | - David E. Moilanen
- Department of Chemistry Stanford University, Stanford, California 94305
| | - M. D. Fayer
- Department of Chemistry Stanford University, Stanford, California 94305
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11
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Cringus D, Bakulin A, Lindner J, Vöhringer P, Pshenichnikov MS, Wiersma DA. Ultrafast Energy Transfer in Water−AOT Reverse Micelles. J Phys Chem B 2007; 111:14193-207. [DOI: 10.1021/jp0723158] [Citation(s) in RCA: 106] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Dan Cringus
- Department of Physical Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands, and Institut für Physikalische und Theoretische Chemie, Rheinische Friedrich-Wilhelms-Universität, Wegelerstrasse 12, 53115 Bonn, Germany
| | - Artem Bakulin
- Department of Physical Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands, and Institut für Physikalische und Theoretische Chemie, Rheinische Friedrich-Wilhelms-Universität, Wegelerstrasse 12, 53115 Bonn, Germany
| | - Jörg Lindner
- Department of Physical Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands, and Institut für Physikalische und Theoretische Chemie, Rheinische Friedrich-Wilhelms-Universität, Wegelerstrasse 12, 53115 Bonn, Germany
| | - Peter Vöhringer
- Department of Physical Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands, and Institut für Physikalische und Theoretische Chemie, Rheinische Friedrich-Wilhelms-Universität, Wegelerstrasse 12, 53115 Bonn, Germany
| | - Maxim S. Pshenichnikov
- Department of Physical Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands, and Institut für Physikalische und Theoretische Chemie, Rheinische Friedrich-Wilhelms-Universität, Wegelerstrasse 12, 53115 Bonn, Germany
| | - Douwe A. Wiersma
- Department of Physical Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands, and Institut für Physikalische und Theoretische Chemie, Rheinische Friedrich-Wilhelms-Universität, Wegelerstrasse 12, 53115 Bonn, Germany
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12
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Moilanen DE, Levinger NE, Spry DB, Fayer MD. Confinement or the nature of the interface? Dynamics of nanoscopic water. J Am Chem Soc 2007; 129:14311-8. [PMID: 17958424 PMCID: PMC2532509 DOI: 10.1021/ja073977d] [Citation(s) in RCA: 194] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The dynamics of water confined in two different types of reverse micelles are studied using ultrafast infrared pump-probe spectroscopy of the hydroxyl OD stretch of HOD in H2O. Reverse micelles of the surfactant Aerosol-OT (ionic head group) in isooctane and the surfactant Igepal CO 520 (nonionic head group) in 50/50 wt % cyclohexane/hexane are prepared to have the same diameter water nanopools. Measurements of the IR spectra and vibrational lifetimes show that the identity of the surfactant head groups affects the local environment experienced by the water molecules inside the reverse micelles. The orientational dynamics (time-dependent anisotropy), which is a measure of the hydrogen bond network rearrangement, are very similar for the confined water in the two types of reverse micelles. The results demonstrate that confinement by an interface to form a nanoscopic water pool is a primary factor governing the dynamics of nanoscopic water rather than the presence of charged groups at the interface.
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Affiliation(s)
| | | | - D. B. Spry
- Department of Chemistry, Stanford University 94305
| | - M. D. Fayer
- Department of Chemistry, Stanford University 94305
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13
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Cringus D, Jansen TLC, Pshenichnikov MS, Wiersma DA. Ultrafast anisotropy dynamics of water molecules dissolved in acetonitrile. J Chem Phys 2007; 127:084507. [PMID: 17764269 DOI: 10.1063/1.2771178] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Infrared pump-probe experiments are performed on isolated H(2)O molecules diluted in acetonitrile in the spectral region of the OH stretching vibration. The large separation between water molecules excludes intermolecular interactions, while acetonitrile as a solvent provides substantial hydrogen bonding. Intramolecular coupling between symmetric and asymmetric modes results in the anisotropy decay to the frequency-dependent values of approximately 0-0.2 with a 0.2 ps time constant. The experimental data are consistent with a theoretical model that includes intramolecular coupling, anharmonicity, and environmental fluctuations. Our results demonstrate that intramolecular processes are essential for the H(2)O stretching mode relaxation and therefore can compete with the intermolecular energy transfer in bulk water.
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Affiliation(s)
- Dan Cringus
- Department of Physical Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
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14
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Water solubilization capacity and mean emulsion size of phospholipid-based isooctane-alcohol W/O microemulsion. Colloids Surf A Physicochem Eng Asp 2007. [DOI: 10.1016/j.colsurfa.2006.07.038] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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15
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Pang Y, Deàk JC, Huang W, Lagutchev A, Pakoulev A, Patterson JE, Sechler TD, Wang Z, Dlott DD. Vibrational energy in molecules probed with high time and space resolution. INT REV PHYS CHEM 2007. [DOI: 10.1080/01442350601084091] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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16
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Nucci NV, Vanderkooi JM. Temperature dependence of hydrogen bonding and freezing behavior of water in reverse micelles. J Phys Chem B 2005; 109:18301-9. [PMID: 16853355 DOI: 10.1021/jp051068+] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The mid-infrared spectra of H2O and D2O confined in Aerosol OT (AOT) reverse micelles at various water/surfactant molar ratios (wo) were measured. Previous descriptions of reverse micellar (RM) water have identified three different hydrogen bonding populations in the water pool. (Onori, G.; Santucci, A. J. Phys. Chem. 1993, 97, 5430-5434.) Fitting of the O-H and O-D stretching vibrational modes to Gaussian components corresponding to these three H-bonding populations was used to determine the temperature dependence of the hydrogen bonding populations and to observe the freezing behavior of the encapsulated water pool. The H-bond network behavior of the RM water pool exhibits a strong dependence on wo and does not approximate that of bulk water until wo = 40. The freezing temperature of RM water was wo-independent. The infrared spectra of frozen RM samples has also led us to suggest a mechanism for the low-temperature phase transition behavior of AOT reverse micelles, a subject of interest for cryoenzymology and low-temperature structural biology.
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Affiliation(s)
- Nathaniel V Nucci
- Department of Biochemistry and Biophysics, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.
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18
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Dokter AM, Woutersen S, Bakker HJ. Anomalous slowing down of the vibrational relaxation of liquid water upon nanoscale confinement. PHYSICAL REVIEW LETTERS 2005; 94:178301. [PMID: 15904342 DOI: 10.1103/physrevlett.94.178301] [Citation(s) in RCA: 88] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2005] [Indexed: 05/02/2023]
Abstract
We study the vibrational dynamics of nanodroplets of liquid water with femtosecond two-color midinfrared pump-probe spectroscopy. For the smallest nanodroplet, containing 10-15 water molecules, the lifetime T1 of the O-H stretch vibrations is equal to 0.85+/-0.1 ps, which is more than 3 times as long as in bulk liquid water. We find that the truncation of the hydrogen-bond network of water leads to a dramatic change of the relaxation mechanism.
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Affiliation(s)
- Adriaan M Dokter
- FOM Institute for Atomic and Molecular Physics [AMOLF], Kruislaan 407 Amsterdam, The Netherlands
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19
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Tan HS, Piletic IR, Fayer MD. Orientational dynamics of water confined on a nanometer length scale in reverse micelles. J Chem Phys 2005; 122:174501. [PMID: 15910039 DOI: 10.1063/1.1883605] [Citation(s) in RCA: 193] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
The time-resolved orientational anisotropies of the OD hydroxyl stretch of dilute HOD in H(2)O confined on a nanometer length scale in sodium bis(2-ethylhexyl) sulfosuccinate (AOT) reverse micelles are studied using ultrafast infrared polarization and spectrally resolved pump-probe spectroscopy, and the results are compared to the same experiments on bulk water. The orientational anisotropy data for three water nanopool sizes (4.0, 2.4, and 1.7 nm) can be fitted well with biexponential decays. The biexponential decays are analyzed using a wobbling-in-a-cone model that involves fast orientational diffusion within a cone followed by slower, full orientational relaxation. The data provide the cone angles, the diffusion constants for motion within the cones, and the final diffusion constants as a function of the nanopool size. The two processes can be interpreted as a local angular fluctuation of the OD and a global hydrogen bond network rearrangement process. The trend in the relative amplitudes of the long and short exponential decays suggest an increasing rigidity as the nanopool size decreases. The trend in the long decay constants indicates a longer hydrogen bond network rearrangement time with decreasing reverse micelle size. The anisotropy measurements for the reverse micelles studied extrapolate to approximately 0.33 rather than the ideal value of 0.4, suggesting the presence of an initial inertial component in the anisotropy decay that is too fast to resolve. The very fast decay component is consistent with initial inertial orientational motion that is seen in published molecular-dynamics simulations of water in AOT reverse micelles. The angle over which the inertial orientational motion occurs is determined. The results are in semiquantitative agreement with the molecular-dynamics simulations.
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Affiliation(s)
- Howe-Siang Tan
- Department of Chemistry, Stanford University, California 94305, USA.
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20
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Sando GM, Dahl K, Owrutsky JC. Surfactant Charge Effects on the Location, Vibrational Spectra, and Relaxation Dynamics of Cyanoferrates in Reverse Micelles. J Phys Chem B 2005; 109:4084-95. [PMID: 16851467 DOI: 10.1021/jp045287r] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Ultrafast infrared spectroscopy has been used to measure vibrational energy relaxation (VER) and reorientation (Tr) times for the high frequency CN stretches of potassium ferrocyanide and ferricyanide and the NO stretch of sodium nitroprusside (SNP) in several reverse micelle (RM) systems using cationic, anionic, and nonionic surfactants. The confinement effects on anion vibrational spectra and dynamics in aqueous RMs depend on the charge of the surfactant that is used to form the RMs. Spectra and VER dynamics of ferrocyanide are not significantly altered in the limited number of RMs in which it could be solubilized. The static spectra of ferricyanide suggest an environment that is most bulklike in anionic RMs and least bulklike in cationic RMs. The dynamics of ferricyanide are slower in cationic RMs and indistinguishable from the bulk in nonionic RMs. The VER dynamics and static spectra of SNP are indistinguishable from the bulk in anionic RMs, but much slower in cationic RMs. This suggests a strong surfactant-solute repulsion in the former and an attraction in the latter. Broad static spectra and probe frequency dependent dynamics are seen for SNP in nonionic RMs, indicating an inhomogeneous distribution of environments. Similar measurements were carried out for SNP in mixtures of water and a model compound containing only the hydrophilic portion of the nonionic surfactants in which RMs are not formed. The results closely resemble those observed for SNP in nonionic RMs and provide evidence that in the latter water penetrates the interface and hydrates the ethylene oxide groups before forming a water pool. The results are consistent with the explanation that Coulombic forces determine the anion location. The anions are repelled to the interior of the water pool, which has a bulklike environment in anionic RMs, and are attracted to the interface in cationic RMs, resulting in a strong interaction with the surfactant. The solute location in the nonionic RMs depends on the hydrophilic nature of the probe, with ferrocyanide and ferricyanide being more hydrophilic than SNP. These results and the dependence on surfactant charge are similar to those reported for azide.
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Affiliation(s)
- Gerald M Sando
- Code 6111, U.S. Naval Research Laboratory, Washington, D.C. 20375-5342, USA
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21
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Sando GM, Dahl K, Owrutsky JC. Vibrational Relaxation Dynamics of Azide in Ionic and Nonionic Reverse Micelles. J Phys Chem A 2004. [DOI: 10.1021/jp0463363] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Gerald M. Sando
- Code 6111, U.S. Naval Research Laboratory, Washington, D.C. 20375-5342
| | - Kevin Dahl
- Code 6111, U.S. Naval Research Laboratory, Washington, D.C. 20375-5342
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22
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Rey R, Møller KB, Hynes JT. Ultrafast Vibrational Population Dynamics of Water and Related Systems: A Theoretical Perspective. Chem Rev 2004; 104:1915-28. [PMID: 15080716 DOI: 10.1021/cr020675f] [Citation(s) in RCA: 149] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Rossend Rey
- Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya, Campus Nord B4-B5, Barcelona 08034, Spain.
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23
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Zhong Q, Baronavski AP, Owrutsky JC. Reorientation and vibrational energy relaxation of pseudohalide ions confined in reverse micelle water pools. J Chem Phys 2003. [DOI: 10.1063/1.1614207] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
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24
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Zhong Q, Baronavski AP, Owrutsky JC. Vibrational energy relaxation of aqueous azide ion confined in reverse micelles. J Chem Phys 2003. [DOI: 10.1063/1.1562608] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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25
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Seifert G, Patzlaff T, Graener H. Size dependent ultrafast cooling of water droplets in microemulsions by picosecond infrared spectroscopy. PHYSICAL REVIEW LETTERS 2002; 88:147402. [PMID: 11955174 DOI: 10.1103/physrevlett.88.147402] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2001] [Indexed: 05/23/2023]
Abstract
The ultrafast thermal relaxation of reversed micelles in n-octane/AOT/water (where AOT denotes sodium di-2-ethylhexyl sulfosuccinate) microemulsions was investigated by time-resolved infrared pump-probe spectroscopy. This picosecond cooling process can be described in terms of heat diffusion, demonstrating a new method to determine the nanometer radii of the water droplets. The reverse micelles are stable against transient temperatures far above the equilibrium stability range. The amphiphilic interface layer (AOT) seems to provide an efficient heat contact between the water and the nonpolar solvent.
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Affiliation(s)
- G Seifert
- Martin-Luther-Universität Halle-Wittenberg, Fachbereich Physik, Hoher Weg 8, D-06099 Halle, Germany
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26
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Rack JJ, McCleskey TM, Birnbaum ER. Perturbing the Sequestered Water-Pool in Microemulsions: The Role of the Probe in Affecting Reverse Micelle Equilibria. J Phys Chem B 2001. [DOI: 10.1021/jp012472l] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jeffrey J. Rack
- Chemistry Division, MS J514, Los Alamos National Laboratories, Los Alamos, New Mexico 87545
| | - T. Mark McCleskey
- Chemistry Division, MS J514, Los Alamos National Laboratories, Los Alamos, New Mexico 87545
| | - Eva R. Birnbaum
- Chemistry Division, MS J514, Los Alamos National Laboratories, Los Alamos, New Mexico 87545
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