1
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Zavitsas AA. Quest To Demystify Water: Ideal Solution Behaviors Are Obtained by Adhering to the Equilibrium Mass Action Law. J Phys Chem B 2019; 123:869-883. [DOI: 10.1021/acs.jpcb.8b07166] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Andreas A. Zavitsas
- Department of Chemistry and Biochemistry, Long Island University, 1 University Plaza, Brooklyn, New York 11201, United States
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2
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Jain P, Kumar A. Enthalpic interactions in aqueous strong electrolytes upon addition of ionic liquids. Phys Chem Chem Phys 2018; 20:11089-11099. [PMID: 29620767 DOI: 10.1039/c7cp07814e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The present study deals with the inter-ionic interactions between strong electrolytes and ionic liquids based on the thermodynamic properties such as excess partial molar enthalpy, HEIL, relative apparent molar enthalpy, φL, and the enthalpic interaction parameters. The thermodynamic properties of the systems are the key indicators to understand the interionic interactions. We have conducted a systematic investigation of the enthalpic behavior of aqueous solution of salts and ionic liquids and their mixtures. The present study also emphasizes how the HEIL values for the mixture of aqueous solution of ionic liquids and salts deviate from linearity as compared to those of the constituent aqueous ionic liquid or salt. This deviation from linearity for the HEIL values has been discussed here.
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Affiliation(s)
- Preeti Jain
- Physical & Materials Chemistry Division, CSIR - National Chemical Laboratory, Pune 411 008, India.
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3
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Yonenaga K, Morita T, Nishikawa K, Koga Y. Effects of ionic liquid constituent cations, tetraalkylammoniums, on water studied by means of the “1-propanol probing methodology”. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2017.12.130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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4
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Nitta A, Morita T, Nishikawa K, Koga Y. Mixing scheme of an aqueous solution of tetrabutylphosphonium trifluoroacetate in the water-rich region. Phys Chem Chem Phys 2017. [DOI: 10.1039/c7cp02997g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The enthalpic interaction of this particular ionic liquid is extremely high, 16 000 kJ mol−1!
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Affiliation(s)
- Ayako Nitta
- Division of Nano Science
- Graduate School of Advanced Integration Science
- Chiba University
- Chiba 263-8522
- Japan
| | - Takeshi Morita
- Division of Nano Science
- Graduate School of Advanced Integration Science
- Chiba University
- Chiba 263-8522
- Japan
| | - Keiko Nishikawa
- Division of Nano Science
- Graduate School of Advanced Integration Science
- Chiba University
- Chiba 263-8522
- Japan
| | - Yoshikata Koga
- Department of Chemistry
- The University of British Columbia
- Vancouver
- Canada
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5
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Giuffrida S, Cottone G, Cordone L. The water association band as a marker of hydrogen bonds in trehalose amorphous matrices. Phys Chem Chem Phys 2017; 19:4251-4265. [DOI: 10.1039/c6cp06848k] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The water association band is a suitable marker of residual water behavior in bioprotective trehalose matrices.
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Affiliation(s)
- Sergio Giuffrida
- Dipartimento di Fisica e Chimica
- Università degli Studi di Palermo
- Palermo
- Italy
| | - Grazia Cottone
- Dipartimento di Fisica e Chimica
- Università degli Studi di Palermo
- Palermo
- Italy
- School of Physics
| | - Lorenzo Cordone
- Dipartimento di Fisica e Chimica
- Università degli Studi di Palermo
- Palermo
- Italy
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6
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Koga Y, Miki K, Nishikawa K. Effects of H + and OH − on H 2O as probed by the 1-propanol probing methodology: differential thermodynamic approach. Phys Chem Chem Phys 2017; 19:27413-27420. [DOI: 10.1039/c7cp05519f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two-dimensional characterization map of H+ and OH−, together with other ions.
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Affiliation(s)
- Yoshikata Koga
- Department of Chemistry
- The University of British Columbia
- Vancouver, BC
- V6T 1Z1, Canada, and Suitekijuku
- Vancouver
| | - Kumiko Miki
- Department of Liberal Arts and Basic Sciences
- College of Industrial Technology
- Nihon University
- Narashino
- Japan
| | - Keiko Nishikawa
- Graduate School of Advanced Integration Science, Chiba University
- Chiba 263-8522
- Japan
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7
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Antalek M, Pace E, Hedman B, Hodgson KO, Chillemi G, Benfatto M, Sarangi R, Frank P. Solvation structure of the halides from x-ray absorption spectroscopy. J Chem Phys 2016; 145:044318. [PMID: 27475372 PMCID: PMC4967075 DOI: 10.1063/1.4959589] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Accepted: 07/11/2016] [Indexed: 11/14/2022] Open
Abstract
Three-dimensional models for the aqueous solvation structures of chloride, bromide, and iodide are reported. K-edge extended X-ray absorption fine structure (EXAFS) and Minuit X-ray absorption near edge (MXAN) analyses found well-defined single shell solvation spheres for bromide and iodide. However, dissolved chloride proved structurally distinct, with two solvation shells needed to explain its strikingly different X-ray absorption near edge structure (XANES) spectrum. Final solvation models were as follows: iodide, 8 water molecules at 3.60 ± 0.13 Å and bromide, 8 water molecules at 3.40 ± 0.14 Å, while chloride solvation included 7 water molecules at 3.15 ± 0.10 Å, and a second shell of 7 water molecules at 4.14 ± 0.30 Å. Each of the three derived solvation shells is approximately uniformly disposed about the halides, with no global asymmetry. Time-dependent density functional theory calculations simulating the chloride XANES spectra following from alternative solvation spheres revealed surprising sensitivity of the electronic state to 6-, 7-, or 8-coordination, implying a strongly bounded phase space for the correct structure during an MXAN fit. MXAN analysis further showed that the asymmetric solvation predicted from molecular dynamics simulations using halide polarization can play no significant part in bulk solvation. Classical molecular dynamics used to explore chloride solvation found a 7-water solvation shell at 3.12 (-0.04/+0.3) Å, supporting the experimental result. These experiments provide the first fully three-dimensional structures presenting to atomic resolution the aqueous solvation spheres of the larger halide ions.
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Affiliation(s)
- Matthew Antalek
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, USA
| | - Elisabetta Pace
- Laboratori Nazionali di Frascati-INFN, P.O. Box 13, 00044 Frascati, Italy
| | - Britt Hedman
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, USA
| | - Keith O Hodgson
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
| | - Giovanni Chillemi
- CINECA, SCAI-SuperComputing Applications and Innovation Department, Via dei Tizii 6, 00185 Roma, Italy
| | - Maurizio Benfatto
- Laboratori Nazionali di Frascati-INFN, P.O. Box 13, 00044 Frascati, Italy
| | - Ritimukta Sarangi
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, USA
| | - Patrick Frank
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, USA
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8
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9
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Koga Y. Two-dimensional characterization of the effect of solute on H2O: A thermodynamic probing methodology. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2014.09.048] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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10
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Morita T, Miki K, Nitta A, Ohgi H, Westh P. Effects of constituent ions of a phosphonium-based ionic liquid on molecular organization of H2O as probed by 1-propanol: tetrabutylphosphonium and trifluoroacetate ions. Phys Chem Chem Phys 2015; 17:22170-8. [DOI: 10.1039/c5cp02329g] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The phosphonium-based cation, [P4444]+, is significant amphiphile with strong hydrophobic and equally strong hydrophilic contributions.
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Affiliation(s)
- Takeshi Morita
- Graduate School of Advanced Integration Science
- Chiba University
- Chiba 263-8522
- Japan
| | - Kumiko Miki
- Department of Liberal Arts and Basic Sciences
- College of Industrial Technology
- Nihon University
- Narashino
- Japan
| | - Ayako Nitta
- Graduate School of Advanced Integration Science
- Chiba University
- Chiba 263-8522
- Japan
| | - Hiroyo Ohgi
- Graduate School of Advanced Integration Science
- Chiba University
- Chiba 263-8522
- Japan
| | - Peter Westh
- NSM Research for Functional Biomaterials
- Roskilde University
- Roskilde DK-4000
- Denmark
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11
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Song S, Song A, Feng L, Wei G, Dong S, Hao J. Fluorescent hydrogels with tunable nanostructure and viscoelasticity for formaldehyde removal. ACS APPLIED MATERIALS & INTERFACES 2014; 6:18319-28. [PMID: 25278148 DOI: 10.1021/am505701u] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Hydrogels with ultrahigh water content, ∼99 wt %, and highly excellent mechanical strength were prepared by 4'-para-phenylcarboxyl-2,2':6',2″-terpyridine (PPCT) in KOH aqueous solution. The self-assembled structure, rheological properties, and the gel-sol transformation temperature (Tgel-sol) of PPCT/KOH hydrogels that depend on PPCT and KOH concentrations were studied, indicating easily controllable conditions for producing hydrogels in PPCT and KOH mixtures. An important finding was that the hydration radius (Rh) of cations (M(+) = Li(+), Na(+), K(+), Cs(+), NH4(+), (CH3)4N(+), (CH3CH2)4N(+), (CH3CH2CH2)4N(+), (CH3CH2CH2CH2)4N(+)) plays a vital role in gelation of PPCT/MOH systems. To produce hydrogels in PPCT/MOH systems, the Rh of M(+) must be in a suitable region of 3.29 to 3.58 Å, e.g., K(+), Na(+), Cs(+), and the capability of M(+) for inducing PPCT to form hydrogels is K(+) > Na(+) > Li(+), which is followed by the Hofmeister series. The hydrogels of PPCT and KOH mixtures are responsive to external stimuli including temperature and shearing force, and present gelation-induced enhanced fluorescence emission property. The states of being sensitive to the stimuli can readily recover to the original hydrogels, which are envisaged to be an attracting candidate to produce self-healing materials. A typical function of the hydrogels of PPCT and KOH mixtures is that formaldehyde (HCHO) can speedily be adsorbed via electrostatic interaction and converted into nontoxic salts (HCOOK and CH3OK), making it a promising candidate material for HCHO removal in home furnishings to reduce indoor environmental pollutants.
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Affiliation(s)
- Shasha Song
- Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials, Shandong University , Ministry of Education, Jinan 250100, China
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12
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Morita T, Westh P, Nishikawa K, Koga Y. How Much Weaker Are the Effects of Cations than Those of Anions? The Effects of K+ and Cs+ on the Molecular Organization of Liquid H2O. J Phys Chem B 2014; 118:8744-9. [DOI: 10.1021/jp504245c] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Takeshi Morita
- Graduate
School of Advanced Integration Science, Chiba University, Chiba 263-8522, Japan
| | - Peter Westh
- NSM,
Research Unit for Functional Biomaterials, Roskilde University, Roskilde DK4000, Denmark
| | - Keiko Nishikawa
- Graduate
School of Advanced Integration Science, Chiba University, Chiba 263-8522, Japan
| | - Yoshikata Koga
- Department
of Chemistry, The University of British Columbia, Vancouver V6T 1Z1, Canada
- Suitekijuku, Vancouver V6R 2P5, Canada
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13
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14
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Tomé LIN, Pinho SP, Jorge M, Gomes JRB, Coutinho JAP. Salting-in with a salting-out agent: explaining the cation specific effects on the aqueous solubility of amino acids. J Phys Chem B 2013; 117:6116-28. [PMID: 23638911 DOI: 10.1021/jp4021307] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Although the understanding of ion specific effects on the aqueous solubilities of biomolecules is crucial for the development of many areas of biochemistry and life sciences, a consensual and well-supported molecular picture of the phenomena has not yet been established. Mostly, the influence of cations and the nature of the molecular interactions responsible for the reversal of the Hofmeister trend in aqueous solutions of amino acids and proteins are still defectively understood. Aiming at contributing to the understanding of the molecular-level mechanisms governing the cation specific effects on the aqueous solubilities of biocompounds, experimental solubility measurements and classical molecular dynamics simulations were performed for aqueous solutions of three amino acids (alanine, valine, and isoleucine), in the presence of a series of inorganic salts. The evidence gathered suggests that the mechanism by which salting-in inducing cations operate in aqueous solutions of amino acids is different from that of anions, and allows for a novel and consistent molecular description of the effect of the cation on the solubility based on specific interactions of the cations with the negatively charged moieties of the biomolecules.
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Affiliation(s)
- Luciana I N Tomé
- CICECO, Departamento de Química, Universidade de Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
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15
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Koga Y, Sebe F, Nishikawa K. Effects of Tetramethyl- and Tetraethylammonium Chloride on H2O: Calorimetric and Near-Infrared Spectroscopic Study. J Phys Chem B 2013; 117:877-83. [DOI: 10.1021/jp3082744] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Yoshikata Koga
- Suitekijuku (Water Drop Institute), Vancouver, BC, Canada V6R 2P5, and
Department of Chemistry, The University of British Columbia, Vancouver, BC, Canada V6T 1Z1
| | - Fumie Sebe
- Graduate School of Advanced
Integration Sciences, Chiba University,
Chiba 263-8522 Japan
| | - Keiko Nishikawa
- Graduate School of Advanced
Integration Sciences, Chiba University,
Chiba 263-8522 Japan
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16
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Galamba N. On the Effects of Temperature, Pressure, and Dissolved Salts on the Hydrogen-Bond Network of Water. J Phys Chem B 2013; 117:589-601. [DOI: 10.1021/jp309312q] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- N. Galamba
- Grupo de Física-Matemática
da Universidade de Lisboa, Av. Prof. Gama
Pinto 2, 1649-003
Lisboa, Portugal
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Abstract
Biochemical specialization of cellular microtubules has emerged as a primary mechanism in specifying microtubule dynamics and function. However, study of specific subcellular populations of cytoplasmic microtubules has been limited, particularly in the nervous system. The complexity of nervous tissue makes it difficult to distinguish neuronal microtubules from glial microtubules, and axonal microtubules from dendritic and cell body microtubules. The problem is further compounded by the finding that a large fraction of neuronal tubulin is lost during standard preparations of brain tubulin, and this population of stable microtubules is enriched in axons. Here, we consider a unique biological model that provides a unique opportunity to study axonal microtubules both in situ and in vitro: isolated axoplasm from the squid giant axon. The axoplasm model represents a powerful system for addressing fundamental questions of microtubule structure and function in the axon.
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Affiliation(s)
- Yuyu Song
- Department of Genetics and Howard Hughes Medical Institute, Yale School of Medicine, New Haven, Connecticut, USA
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18
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Koga Y. 1-Propanol probing methodology: two-dimensional characterization of the effect of solute on H2O. Phys Chem Chem Phys 2013; 15:14548-65. [DOI: 10.1039/c3cp51650d] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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19
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Koga Y, Kondo T, Miyazaki Y, Inaba A. The Effects of Sulphate and Tartrate Ions on the Molecular Organization of Water: Towards Understanding the Hofmeister Series (VI). J SOLUTION CHEM 2012. [DOI: 10.1007/s10953-012-9880-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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20
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Morita T, Westh P, Nishikawa K, Koga Y. Effects of Ethanol and Dimethyl Sulfoxide on the Molecular Organization of H2O as Probed by 1-Propanol. J Phys Chem B 2012; 116:7328-33. [DOI: 10.1021/jp303619q] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Takeshi Morita
- Graduate School of Advanced Integration Science, Chiba University, Chiba 263-8522 Japan
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21
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Galamba N. Mapping Structural Perturbations of Water in Ionic Solutions. J Phys Chem B 2012; 116:5242-50. [DOI: 10.1021/jp3014578] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- N. Galamba
- Grupo de Física-Matemática
da Universidade de Lisboa, Av. Prof. Gama
Pinto 2, 1649-003
Lisboa, Portugal
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22
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Sebe F, Nishikawa K, Koga Y. Spectrum of excess partial molar absorptivity. Part II: a near infrared spectroscopic study of aqueous Na-halides. Phys Chem Chem Phys 2012; 14:4433-9. [DOI: 10.1039/c2cp23255c] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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23
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Koga Y, Westh P, Nishikawa K, Subramanian S. Is a Methyl Group Always Hydrophobic? Hydrophilicity of Trimethylamine-N-oxide, Tetramethyl Urea and Tetramethylammonium Ion. J Phys Chem B 2011; 115:2995-3002. [DOI: 10.1021/jp108347b] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yoshikata Koga
- Department of Chemistry, The University of British Columbia, Vancouver, BC Canada V6T 1Z1
- Suiteki Juku (Water Drop Institute), Vancouver, BC Canada V6R 2P5
| | - Peter Westh
- NSM Research for Functional Biomaterials, Roskilde University, Roskilde DK-4000 Denmark
| | - Keiko Nishikawa
- Graduate School of Advanced Integration Sciences, Chiba University, Chiba 263-8522 Japan
| | - S. Subramanian
- Department of Chemistry, The University of British Columbia, Vancouver, BC Canada V6T 1Z1
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Intermolecular Interactions in Ternary Glycerol–Sample–H2O: Towards Understanding the Hofmeister Series (V). J SOLUTION CHEM 2010. [DOI: 10.1007/s10953-010-9627-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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25
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Freire MG, Neves CMSS, Silva AMS, Santos LMNBF, Marrucho IM, Rebelo LPN, Shah JK, Maginn EJ, Coutinho JAP. 1H NMR and molecular dynamics evidence for an unexpected interaction on the origin of salting-in/salting-out phenomena. J Phys Chem B 2010; 114:2004-14. [PMID: 20088550 DOI: 10.1021/jp9095634] [Citation(s) in RCA: 108] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
By employing (1)H NMR spectroscopy and molecular simulations, we provide an explanation for recent observations that the aqueous solubilities of ionic liquids exhibit salting-out to salting-in regimes upon addition of distinct inorganic salt ions. Using a typical ionic liquid [1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide], we observed the existence of preferential specific interactions between the low electrical charge density ("apolar moiety") parts of the ionic liquid cation and the inorganic salts. These a priori unexpected interactions become increasingly favorable as one moves from salting-out to salting-in effects. More specifically, this interpretation is validated by distinct aqueous solution (1)H NMR data shifts in the ionic liquid cation upon inorganic salt addition. These shifts, which are well noted in the terminal and preterminal hydrogens of the alkyl chain appended to the imidazolium ring, correlate quantitatively with solubility data, both for cases where the nature of inorganic salt is changed, at constant concentration, and for those where the concentration of a given inorganic salt is varied. Molecular simulations have also been performed permitting us to garner a broader picture of the underlying mechanism and structure of this complex solvation phenomenon. These findings can now be profitably used to anticipate solution behavior upon inorganic salt addition well beyond the specificity of the ionic liquid solutions, i.e., for a diversity of distinct solutes differing in chemical nature.
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Affiliation(s)
- Mara G Freire
- Instituto de Tecnologia Química e Biológica, ITQB2, Universidade Nova de Lisboa, Av. República, Apartado 127, 2780-901 Oeiras, Portugal
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Koga Y, Westh P, Inaba A, Sou K, Tozaki KI. Experimental Determination of Third Derivative of the Gibbs Free Energy, G II: Differential Pressure Perturbation Calorimetry. J SOLUTION CHEM 2010. [DOI: 10.1007/s10953-010-9510-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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27
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Kato H, Miki K, Mukai T, Nishikawa K, Koga Y. Hydrophobicity/hydrophilicity of 1-butyl-2,3-dimethyl and 1-ethyl-3-methylimodazolium ions: toward characterization of room temperature ionic liquids. J Phys Chem B 2010; 113:14754-60. [PMID: 19821593 DOI: 10.1021/jp907804a] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
We continue to experimentally characterize the constituent ions of room temperature ionic liquids in terms of their interactions with H(2)O. By using the so-called 1-propanol probing methodology, we experimentally index the relative hydrophobicity/hydrophilicity of a test ion. In this paper, we examine 1-butyl-2,3 dimethylimidazolium (abbreviated as [C(4)C(1)mim](+)) and 1-ethyl-3-methylimidazolium ([C(2)mim](+)). We found that [C(4)C(1)mim](+) dissociates completely in dilute aqueous solution less than 0.006 mol fraction, and hence, its hydrophobicity/hydrophilicity could be determined. The results indicate that [C(4)C(1)mim](+) is highly amphiphilic with much stronger hydrophobicity and hydrophilicity than normal ions. Our earlier similar studies indicated the same conclusion for such typical constituent ions as 1-butyl-3-methylimidazolium ([C(4)mim](+)), PF(6)(-), CF(3)SO(3)(-), and N(SO(2)CF(3))(2)(-). Hence, we suggest that the constituent ions of room temperature ionic liquids that we have studied so far are all amphiphiles with much stronger hydrophobicity and hydrophilicity than normal ions. We found, furthermore, that the hydrophobicity and hydrophilicity of [C(4)C(1)mim](+) are stronger than those for [C(4)mim](+). A possible reason for higher hydrpohilicity is discussed in terms of strong acidic character of H on the C(2) of the imidazolium ring, which tends to attract the delocalized positive charge toward itself on forming a hydrogen bond to H(2)O. On replacing it with CH(3) in [C(4)C(1)mim](+), the lack of acidic H enhances the positive charge in the vicinity of N-C-N in the ring that interacts with the surrounding H(2)O strongly to an induced dipole of O of the H(2)O. For [C(2)mim](+), we found it does not dissociate completely, even in dilute aqueous solution, and hence, we could not characterize it within the present methodology.
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Affiliation(s)
- Hitoshi Kato
- Graduate School of Advanced Integration Sciences, Chiba University, Chiba 263-8522 Japan
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28
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Tomé LIN, Varanda FR, Freire MG, Marrucho IM, Coutinho JAP. Towards an understanding of the mutual solubilities of water and hydrophobic ionic liquids in the presence of salts: the anion effect. J Phys Chem B 2009; 113:2815-25. [PMID: 19708113 DOI: 10.1021/jp810141d] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The understanding of the specific interactions between salt ions and ionic liquids (ILs) in aqueous solutions is relevant in multiple applications. The influence of a series of anions on the solubility of 1-butyl-3-methylimidazolium tricyanomethane in aqueous environment was here studied. This study aims at gathering further information to evaluate the recently proposed mechanisms of salting-in- and salting-out-inducing ions in aqueous solutions of ILs and to provide insights at the molecular-level on the phenomena occurring in these systems. The observed effect of the inorganic species on the aqueous solubility of the ionic liquid qualitatively follows the Hofmeister series, and it is dependent on the nature and concentration of the anions. The liquid-liquid equilibrium data and 1H NMR results here reported support a model according to which salting-in- and salting-out-inducing ions operate by essentially different mechanisms. While salting-out is an entropically driven effect resulting from the formation of hydration complexes and the increase of the surface tension of cavity formation, the salting-in phenomena is a consequence of the direct binding of the ions to the hydrophobic moieties of the IL. Further evidence here obtained suggests that the interactions of the inorganic ions are not only established with the cation of the IL, but also with the anion, with the observed solubility effect the result of a balance between those two types of interactions.
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Affiliation(s)
- Luciana I N Tomé
- CICECO, Departamento de Química, Universidade de Aveiro, 3810-193 Aveiro, Portugal
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Cui X, Khlobystov A, Chen X, Marsh D, Blake A, Lewis W, Champness N, Roberts C, Schröder M. Dynamic Equilibria in Solvent-Mediated Anion, Cation and Ligand Exchange in Transition-Metal Coordination Polymers: Solid-State Transfer or Recrystallisation? Chemistry 2009; 15:8861-73. [DOI: 10.1002/chem.200900796] [Citation(s) in RCA: 111] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Westh P, Inaba A, Koga Y. Experimental determination of the third derivative of G. I. Enthalpic interaction. J Chem Phys 2008; 129:211101. [DOI: 10.1063/1.3033366] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Nucci NV, Vanderkooi JM. Effects of Salts of the Hofmeister Series on the Hydrogen Bond Network of Water. J Mol Liq 2008; 143:160-170. [PMID: 19847287 PMCID: PMC2748947 DOI: 10.1016/j.molliq.2008.07.010] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The effect of salts on water behavior has been a topic of interest for many years; however, some recent reports have suggested that ions do not influence the hydrogen bonding behavior of water. Using an effective two-state hydrogen bonding model to interpret the temperature excursion infrared response of the O-H stretch of aqueous salt solutions, we show a strong correlation between salt effects on water hydrogen bonding and the Hofmeister order. These data clearly show that salts do have a measurable impact on the equilibrium hydrogen bonding behavior of water and support models which explain Hofmeister effects on the basis of solute charge density.
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Affiliation(s)
- Nathaniel V. Nucci
- Department of Biochemistry and Biophysics, University of Pennsylvania. 422 Curie Boulevard, Philadelphia, PA 19104, 1*(215)898-8783, fax: 1*(215)573-2085,
| | - Jane M. Vanderkooi
- Department of Biochemistry and Biophysics, University of Pennsylvania. 422 Curie Boulevard, Philadelphia, PA 19104, 1*(215)898-8783, fax: 1*(215)573-2085,
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Kato H, Nishikawa K, Murai H, Morita T, Koga Y. Chemical Potentials in Aqueous Solutions of Some Ionic Liquids with the 1-Ethyl-3-methylimidazolium Cation. J Phys Chem B 2008; 112:13344-8. [DOI: 10.1021/jp806658t] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Hitoshi Kato
- Graduate School of Science and Technologies, Chiba University, Chiba 263-8522, Japan, Graduate School of Advanced Integration Sciences, Chiba University, Chiba 263-8522, Japan, Department of Chemistry, Aichi University of Education, Kariya, 448-8542, Japan, and Department of Chemistry, The University of British Columbia, Vancouver, B.C., Canada V6T 1Z1
| | - Keiko Nishikawa
- Graduate School of Science and Technologies, Chiba University, Chiba 263-8522, Japan, Graduate School of Advanced Integration Sciences, Chiba University, Chiba 263-8522, Japan, Department of Chemistry, Aichi University of Education, Kariya, 448-8542, Japan, and Department of Chemistry, The University of British Columbia, Vancouver, B.C., Canada V6T 1Z1
| | - Hiromi Murai
- Graduate School of Science and Technologies, Chiba University, Chiba 263-8522, Japan, Graduate School of Advanced Integration Sciences, Chiba University, Chiba 263-8522, Japan, Department of Chemistry, Aichi University of Education, Kariya, 448-8542, Japan, and Department of Chemistry, The University of British Columbia, Vancouver, B.C., Canada V6T 1Z1
| | - Takeshi Morita
- Graduate School of Science and Technologies, Chiba University, Chiba 263-8522, Japan, Graduate School of Advanced Integration Sciences, Chiba University, Chiba 263-8522, Japan, Department of Chemistry, Aichi University of Education, Kariya, 448-8542, Japan, and Department of Chemistry, The University of British Columbia, Vancouver, B.C., Canada V6T 1Z1
| | - Yoshikata Koga
- Graduate School of Science and Technologies, Chiba University, Chiba 263-8522, Japan, Graduate School of Advanced Integration Sciences, Chiba University, Chiba 263-8522, Japan, Department of Chemistry, Aichi University of Education, Kariya, 448-8542, Japan, and Department of Chemistry, The University of British Columbia, Vancouver, B.C., Canada V6T 1Z1
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Koga Y, Miyazaki Y, Nagano Y, Inaba A. Mixing Schemes in a Urea−H2O System: A Differential Approach in Solution Thermodynamics. J Phys Chem B 2008; 112:11341-6. [DOI: 10.1021/jp803018q] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yoshikata Koga
- Research Center for Molecular Thermodynamics, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Yuji Miyazaki
- Research Center for Molecular Thermodynamics, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Yatsuhisa Nagano
- Research Center for Molecular Thermodynamics, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Akira Inaba
- Research Center for Molecular Thermodynamics, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
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Saum SH, Müller V. Regulation of osmoadaptation in the moderate halophile Halobacillus halophilus: chloride, glutamate and switching osmolyte strategies. SALINE SYSTEMS 2008; 4:4. [PMID: 18442383 PMCID: PMC2412884 DOI: 10.1186/1746-1448-4-4] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2008] [Accepted: 04/28/2008] [Indexed: 11/10/2022]
Abstract
The moderate halophile Halobacillus halophilus is the paradigm for chloride dependent growth in prokaryotes. Recent experiments shed light on the molecular basis of the chloride dependence that is reviewed here. In the presence of moderate salinities Halobacillus halophilus mainly accumulates glutamine and glutamate to adjust turgor. The transcription of glnA2 (encoding a glutamine synthetase) as well as the glutamine synthetase activity were identified as chloride dependent steps. Halobacillus halophilus switches its osmolyte strategy and produces proline as the main compatible solute at high salinities. Furthermore, Halobacillus halophilus also shifts its osmolyte strategy at the transition from the exponential to the stationary phase where proline is exchanged by ectoine. Glutamate was found as a "second messenger" essential for proline production. This observation leads to a new model of sensing salinity by sensing the physico-chemical properties of different anions.
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Affiliation(s)
- Stephan H Saum
- Molecular Microbiology & Bioenergetics, Institute of Molecular Biosciences, Goethe University Frankfurt, Frankfurt am Main, Germany.
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Miki K, Westh P, Koga Y. Interactions of Na-Salts and 1-Propanol in 1-Propanol−Na-Salt−H2O Systems: Toward an Understanding the Hofmeister Series (IV). J Phys Chem B 2008; 112:4680-6. [DOI: 10.1021/jp7113829] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kumiko Miki
- Department of Liberal Arts and Basic Sciences, College of Industrial Technology, Nihon University, Narashino, Chiba, Japan 275-8575
| | - Peter Westh
- NSM, Research Unit for Functional Biomaterials, Roskilde University, Roskilde DK-4000, Denmark
| | - Yoshikata Koga
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1, and Research Center for Molecular Thermodynamics, Graduate School of Science, Osaka University, Toyonaka, Osaka, Japan 560-0043
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Kato H, Nishikawa K, Koga Y. Relative hydrophobicity and hydrophilicity of some "ionic liquid" anions determined by the 1-propanol probing methodology: a differential thermodynamic approach. J Phys Chem B 2008; 112:2655-60. [PMID: 18254621 DOI: 10.1021/jp710867s] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The excess partial molar enthalpy of 1-propanol (1P), H(E) (1P), was experimentally measured in ternary 1P-[NaPF(6), NaCF(3)SO(3) (OTF) or NaN(SO(2)CF(3))(2) (TFSI)]-H(2)O system. From the H(E) (1P), the enthalpic 1P-1P interaction function, H(E) (1P-1P), which is the compositional derivative of H(E) (1P), was evaluated graphically. On addition of the Na salt, the x(1P)-dependence pattern of H(E) (1P-1P) showed a characteristic change. This induced change is used as a probe to elucidate the effect of the sample Na-salt on H(2)O. Because we know the effect of Na(+) from our previous work, we show that each anion works as an amphiphile with hydrophobic and hydrophilic effects. Furthermore, the present method can quantify its relative hydrophobicity and hydrophilicity separately. The results indicate that the relative hydrophobicity ranking was in the order of TFSI(-) > PF(6-) approximately OTF(-), and the hydrophilicity TFSI(-) > PF6(- )> OTF-. Namely, TFSI- is the strongest amphiphile with the strongest hydrophobicity and the strongest hydrophilicity among the ionic liquid (IL) anions studied here. Using our earlier similar studies for normal ions, we map their relative hydrophobicity/hydrophilicity scales on a two-dimensional map together with those of the IL ions. The resulting map shows that the typical constituent ions for "ionic liquids" are strong amphiphiles; with more strongly hydrophobic and more strongly hydrophilic propensities than normal ions. Although the number of data points is limited, the melting points of ionic liquids consisting of TFSI(-) with the strongest hydrophobicity and the strongest hydrophilicity within the anions studied here are the lowest.
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Affiliation(s)
- Hitoshi Kato
- Graduate School of Science and Technology, Chiba University, Chiba, Japan 263-8522
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Ciferri A. Charge-dependent and charge-independent contributions to ion-protein interaction. Biopolymers 2008; 89:700-9. [DOI: 10.1002/bip.20997] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Montecinos R, Ahumada H, Araya-Maturana R, Olea AF, Weiss-López BE. Counterion and composition effects on discotic nematic lyotropic liquid crystals. J Colloid Interface Sci 2007; 316:126-31. [PMID: 17707854 DOI: 10.1016/j.jcis.2007.07.060] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2007] [Revised: 07/20/2007] [Accepted: 07/23/2007] [Indexed: 12/01/2022]
Abstract
Counterion and composition effects on the size and interface dynamics of discotic nematic lyotropic liquid crystals made of tetradecyltrimethylammonium halide (TTAX)-decanol (DeOH)-water-NaX, with X = Cl(-) and Br(-), were investigated using NMR and fluorescence spectroscopies. The dynamics of the interface was examined by measuring deuterium quadrupole splittings from HDO (0.1% D(2)O in H(2)O) and 1,1-dideuterodecanol (20% 1,1-dideuterodecanol in DeOH) in 27 samples of each liquid crystal. Aggregation numbers, N(D), from 15 samples of each mesophase were obtained using the fluorescence of pyrene quenched by hexadecylpyridinium chloride. N(D) of TTAB and TTAC are about 230+/-30 and 300+/-20, respectively. N(D) of TTAC increases with increasing concentration of all mesophase components, whereas TTAB shows no correlation between size and composition. The dimension of these aggregates prevents the occurrence of undulations, previously observed in lamellar phases. The quadrupole splitting of decanol-d(2) in TTAC is about 5 kHz smaller than in TTAB, and the splitting of HDO is observed only in TTAB. All results are consistent with a more dynamic TTAC interface. The TTAC aggregate should be more dissociated from counterions and the excess ammonium-ammonium electrostatic repulsions contribute to increase the mobility of the interface components.
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Affiliation(s)
- Rodrigo Montecinos
- Universidad de Chile, Facultad de Ciencias, Departamento de Química, Casilla 653, Santiago, Chile
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Lo Nostro P, Ninham BW, Milani S, Lo Nostro A, Pesavento G, Baglioni P. Hofmeister effects in supramolecular and biological systems. Biophys Chem 2006; 124:208-13. [PMID: 16678961 DOI: 10.1016/j.bpc.2006.04.004] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2005] [Revised: 04/14/2006] [Accepted: 04/14/2006] [Indexed: 11/19/2022]
Abstract
Specific ion effects, representative of near-universal Hofmeister phenomena, are illustrated in three different systems. These are the formation of supramolecular assemblies from cyclodextrins, the optical rotation of L-serine, and the growth rate of two kinds of microorganisms (Staphylococcus aureus and Pseudomonas aeruginosa). The strong specific ion effects can be correlated with the anion polarizabilities and related physico-chemical parameters. The results show the relevance of dispersion (non-electrostatic) forces in these phenomena.
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Affiliation(s)
- Pierandrea Lo Nostro
- Department of Chemistry and CSGI, University of Florence, 50019 Sesto Fiorentino (Firenze), Italy.
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Anomalous dynamic behavior of ions and water molecules in dilute aqueous solution of 1-butyl-3-methylimidazolium bromide studied by NMR. Chem Phys Lett 2006. [DOI: 10.1016/j.cplett.2006.06.052] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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