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Sassi P, Comez L, D'Amico F, Rossi B, Bartolini G, Fioretto D, Paolantoni M. Ultraviolet Resonant Raman Scattering of Electrolyte Solutions. APPLIED SPECTROSCOPY 2024:37028241245443. [PMID: 38632936 DOI: 10.1177/00037028241245443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/19/2024]
Abstract
Saltwater stands as the most prevalent liquid on Earth. Consequently, substantial interest has been directed toward its characterization, both as an independent system and as a solvent for complex structures such as biomacromolecules. In the last few decades, special emphasis was placed on the investigation of the hydration properties of ions for the fundamental role they play in numerous chemical processes. In this study, we employed multi-wavelength Raman spectroscopy to examine the hydration shell surrounding bromide ions in solutions of simple electrolytes, specifically lithium bromide, potassium bromide, and cesium bromide, at two different concentrations. Cation-induced differences among electrolytes were observed in connection to their tendency to form ion pairs. An increased sensitivity to reveal the structure of the first hydration shell was evidenced when employing ultraviolet excitation in the 228-266 nm range, under resonance conditions with the charge transfer transition to the solvent peaked at about 200 nm. Other than a significant increase in the Raman cross-section for the OH stretching band when shifting from pure water to the solution, a larger enhancement for the Raman signal of the H-O-H bending mode over the stretching vibration was observed. Thus, the bending band plays a crucial role in monitoring the H-bond structure of water around the anions related to the charge distribution within the first hydration shell of anions, being an effective probe of hydration phenomena.
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Affiliation(s)
- Paola Sassi
- Dipartimento di Chimica, Biologia e Biotecnologie, Università di Perugia, Perugia, Italy
| | - Lucia Comez
- CNR-Istituto Officina dei Materiali (IOM), Perugia, Italy
| | - Francesco D'Amico
- Elettra-Sincrotrone Trieste S.C.p.A. di interesse nazionale, Trieste, Italy
| | - Barbara Rossi
- Elettra-Sincrotrone Trieste S.C.p.A. di interesse nazionale, Trieste, Italy
| | - Gabriele Bartolini
- Dipartimento di Chimica, Biologia e Biotecnologie, Università di Perugia, Perugia, Italy
| | - Daniele Fioretto
- Dipartimento di Fisica e Geologia, Università di Perugia, Perugia, Italy
| | - Marco Paolantoni
- Dipartimento di Chimica, Biologia e Biotecnologie, Università di Perugia, Perugia, Italy
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Ishikawa D, Shinohara R, Shichishima N, Fujii T. Infrared Spectra in the 1000-100 cm -1 Region Combined with 4000-3000 cm -1 Region to Evaluate the States of Water. APPLIED SPECTROSCOPY 2023; 77:1087-1094. [PMID: 37415528 DOI: 10.1177/00037028231180869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/08/2023]
Abstract
In this study, we evaluated the state of water by performing infrared (IR) spectroscopic analysis in the 4000-100 cm-1 region. The effects of ions on the structure of water molecules were investigated by analyzing specific IR bands of salt solutions in the 1000-100 cm-1 region. Chloride solutions of Li, Na, K, Cs, Ba, and Ca were prepared at different concentrations, and their IR spectra were recorded by the attenuated total reflection method. The isosbestic point was observed in the 1000-100 cm-1 region, and the position was related to the ratio of the Stokes radius and effective ionic radius of each ion. Two bands were identified at around 660 and 400 cm-1 by curve fitting, and the intensity ratio increased linearly with a decrease in water activity. Thus, this demonstrates the potential of the 1000-100 cm-1 region as a marker for the evaluation of water structure subjected to ions. Moreover, it is possible to evaluate different states of water simultaneously by combining this with the band in the 4000-3000 cm-1 region. These results successfully demonstrate the effectiveness of the spectra in the 1000-100 cm-1 region to evaluate the state of water in ionic solutions.
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Affiliation(s)
- Daitaro Ishikawa
- Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi, Japan
| | - Rin Shinohara
- Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi, Japan
| | - Natsumi Shichishima
- Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi, Japan
| | - Tomoyuki Fujii
- Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi, Japan
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Rajapriya Inbaraj N, Song S, Chang R, Fujita K, Hayashi T. Investigation of Hydration States of Ionic Liquids by Fourier Transform Infrared Absorption Spectroscopy: Relevance to Stabilization of Protein Molecules. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:2558-2568. [PMID: 36753569 PMCID: PMC9948542 DOI: 10.1021/acs.langmuir.2c02851] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 12/22/2022] [Indexed: 06/18/2023]
Abstract
Among many kinds of ionic liquids, some hydrated ionic liquids (Hy ILs) have shown an exceptional capability to stabilize protein molecules and maintain their structure and functions over a long period. However, the complex IL-water interaction among these protein-stabilizing Hy ILs has yet to be elucidated clearly. In this work, we investigate the origin of the compatibility of ionic liquid with proteins from the viewpoint of hydration structure. We systematically analyzed the hydrogen-bonding state of water molecules around ionic liquid using Fourier transform infrared absorption (FT-IR) spectroscopy. We found that the native hydrogen-bonding network of water remained relatively unperturbed in the protein-stabilizing ILs. We also observed that the protein-stabilizing ILs have a strong electric field interaction with the surrounding water molecules and this water-IL interaction did not disrupt the water-water hydrogen-bonding interaction. On the other hand, protein-denaturing ILs perturb the hydrogen-bonding network of the water molecules to a greater extent. Furthermore, the protein-denaturing ILs were found to have a weak electric field effect on the water molecules. We speculate that the direct hydrogen bonding of the ILs with water molecules and the strong electric field of the ions lasting several hydration shells while maintaining the relatively unperturbed hydrogen-bonding network of the water molecules play an essential role in protein stabilization.
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Affiliation(s)
- Navin Rajapriya Inbaraj
- Department
of Materials Science and Engineering, School of Materials Science
and Chemical Technology, Tokyo Institute
of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama-shi, Kanagawa-ken 226-8502, Japan
| | - Subin Song
- Department
of Materials Science and Engineering, School of Materials Science
and Chemical Technology, Tokyo Institute
of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama-shi, Kanagawa-ken 226-8502, Japan
| | - Ryongsok Chang
- Department
of Materials Science and Engineering, School of Materials Science
and Chemical Technology, Tokyo Institute
of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama-shi, Kanagawa-ken 226-8502, Japan
| | - Kyoko Fujita
- Department
of Pathophysiology, Tokyo University of
Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan
| | - Tomohiro Hayashi
- Department
of Materials Science and Engineering, School of Materials Science
and Chemical Technology, Tokyo Institute
of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama-shi, Kanagawa-ken 226-8502, Japan
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Brkljača Z, Butumović M, Bakarić D. Water does not dance as ions sing: A new approach in elucidation of ion-invariant water fluctuations. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 271:120907. [PMID: 35144056 DOI: 10.1016/j.saa.2022.120907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 01/07/2022] [Accepted: 01/13/2022] [Indexed: 06/14/2023]
Abstract
Aqueous solutions of salts composed from monovalent ions are explored using temperature-dependent FT-IR spectroscopy in transmission. Water combination band, being extremely sensitive to the network of hydrogen bonds due to the contribution of water librations (ρLH2O), is analyzed in uni- and multivariate fashion. Univariate analysis of the combination band maximum (νmax) reveals that perturbation of water hydrogen bond network by ions is primary driven by electrostatic interactions between water and ions. Using multivariate curve resolution with alternating least squares and evolving factor analysis this band is separated into two components that represent low- and high-density water. The observed asymmetry in their behavior is interpreted in terms of fluctuations of a hydrogen bond network of two water components. The significance of the found phenomenon is unambiguously confirmed by performing analogous analysis in the spectral range that contains partial signature of water linear bending (δHOH) and is free from ρLH2O, in which the asymmetry is absent. Additionally, we show that this phenomenon, namely ion-invariant behavior of water fluctuations, persists even in the regime of high ionic strengths. Although ions indeed participate in shaping of water hydrogen bond network, this straightforward approach shows that its temperature-dependent fluctuations are ion-independent.
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Affiliation(s)
- Zlatko Brkljača
- Division for Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia.
| | - Marija Butumović
- Division of Analytical Chemistry, Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, 10000 Zagreb, Croatia
| | - Danijela Bakarić
- Division for Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia.
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Lavagnini E, Cook JL, Warren PB, Hunter CA. Systematic Parameterization of Ion-Surfactant Interactions in Dissipative Particle Dynamics Using Setschenow Coefficients. J Phys Chem B 2022; 126:2308-2315. [PMID: 35290050 PMCID: PMC9098171 DOI: 10.1021/acs.jpcb.2c00101] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
Dissipative
particle dynamics (DPD) simulations of nonionic surfactants
with an added salt show that the Setschenow relationship is reproduced;
that is, the critical micelle concentration is log-linearly dependent
on the added salt concentration. The simulated Setschenow coefficients
depend on the DPD bead–bead repulsion amplitudes, and matching
to the experimentally determined values provides a systematic method
to parameterize the interactions between salt ion beads and surfactant
beads. The optimized ion-specific interaction parameters appear to
be transferrable and follow the same trends as the empirical Hofmeister
series.
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Affiliation(s)
- Ennio Lavagnini
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
| | - Joanne L Cook
- Unilever R&D Port Sunlight, Quarry Road East, Bebington CH63 3JW, U.K
| | - Patrick B Warren
- Unilever R&D Port Sunlight, Quarry Road East, Bebington CH63 3JW, U.K.,STFC Hartree Centre, Sci-Tech Daresbury, Warrington WA4 4AD, U.K
| | - Christopher A Hunter
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
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Grabowska J, Kuffel A, Zielkiewicz J. Revealing the Frank-Evans "Iceberg" Structures within the Solvation Layer around Hydrophobic Solutes. J Phys Chem B 2021; 125:1611-1617. [PMID: 33539702 PMCID: PMC7898264 DOI: 10.1021/acs.jpcb.0c09489] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Using computer simulations, the structural properties of solvation water of three model hydrophobic molecules, methane and two fullerenes (C60 and C80), were studied. Systems were simulated at temperatures in the range of 250-298 K. By analyzing both the local ordering of the molecules of water in the solvation layers and the structure of hydrogen bond network, it is shown that in the solvation layer of hydrophobic molecules, ordered aggregates consisting of water molecules are formed. Even though it is difficult to define the exact structure of these aggregates, their existence alone is clearly noticeable. Moreover, these aggregates become more pronounced with the decrease of temperature. The existence of the ordered aggregates around the hydrophobic solutes complies with the concept of "icebergs" proposed by Frank and Evans.
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Affiliation(s)
- Joanna Grabowska
- Faculty of Chemistry, Department of Physical Chemistry, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland
| | - Anna Kuffel
- Faculty of Chemistry, Department of Physical Chemistry, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland
| | - Jan Zielkiewicz
- Faculty of Chemistry, Department of Physical Chemistry, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland
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Park KC, Tsukahara T. Expansion of Ion Effects on Water Induced by a High Hydrophilic Surface of a Polymer Network. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:159-168. [PMID: 31880466 DOI: 10.1021/acs.langmuir.9b02892] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The spatial extent and anion-cation cooperativity of the ion effect on the structure and dynamics of water have long been debated but are still controversial. Previously, we experimentally demonstrated the extensive and cooperative effect of ions on water in a polyamide network by measuring the reflection wavelength (λ) on the ion sensor of poly(N-isopropylacrylamide) (PNIPAAm) hydrogel-immobilized photonic crystals. In the present study, we investigated the influence of the polymer surface on the ion effect by adopting a highly hydrophilic poly(N-isopropylacrylamide-co-N-acryloylaza-18-crown-6) hydrogel as a sensor matrix. In alkaline earth metal salt solutions, the copolymer hydrogel membrane sensor showed the redshift of λ for the specific combination of cations and anions, that is, Ca2+/Cl- and Sr2+/NO3-, which resulted from the concerted binding of ion pairs to the copolymer receptor. In alkali metal salt solutions, the ion sensor showed the blueshift of λ originating from the osmotic dehydration suppressed by the salts. The strength of the ion effect was evaluated by the average osmotic pressure (ΠA) required for the salt-inhibited dehydration in the early stage of hydrogel contraction. From the calculation results of ΠA for the copolymer and PNIPAAm hydrogels, it was found that the high hydrophilic copolymer surface more significantly enhanced the ion effect of structure-making cations (i.e., Li+) compared with borderline (Na+) and structure-breaking (K+ and Cs+) cations. Furthermore, the ion effect exhibited the higher ion cooperativity in combination with chloride anions than with nitrate anions. The enhancement of the long-range cooperative ion effect is derived from the expansion of the interactions between ions, water molecules, and the hydrophilic polymer network.
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Affiliation(s)
- Ki Chul Park
- Laboratory for Advanced Nuclear Energy , Institute of Innovative Research, Tokyo Institute of Technology , Tokyo 152-8550 , Japan
| | - Takehiko Tsukahara
- Laboratory for Advanced Nuclear Energy , Institute of Innovative Research, Tokyo Institute of Technology , Tokyo 152-8550 , Japan
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Park KC, Tsukahara T. Quantitative Evaluation of Long-Range and Cooperative Ion Effect on Water in Polyamide Network. J Phys Chem B 2019; 123:2948-2955. [PMID: 30888819 DOI: 10.1021/acs.jpcb.9b00717] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Despite long-standing research efforts to elucidate the specific ion effect on the structure and dynamics of water, the spatial extent affected by ions and the cooperativity of ions and counterions are still controversial. Here, we demonstrate an undoubtable evidence of long-range and cooperative ion effect on water molecules in a polyamide network by using a precision ion sensor of photonic crystal hydrogel membrane. The ion effect was quantitatively evaluated by means of the osmotic work per unit cell volume change of photonic crystal, Wunit, required for the ion-inhibited dehydration, which means a suppressed migration of water molecules by the extensive effect of ions beyond their immediate hydration shells. It was found that Wunit required for 14 vol % contraction of the membrane sensor in LiCl aqueous solutions was 7.7 times larger than that in Sr(NO3)2 solutions. The combination of structure-making Ca2+ and Sr2+ with nitrate anions lowered the ion effect than the chloride salts of borderline Na+ and Ba2+. Furthermore, the nitrate salt of Sr2+ exhibited a lower ion effect than the chloride salts of structure-breaking K+ and Cs+. These results have revealed that the ion effect acts to water extensively, which is modulated by cooperative interactions of ions and counterions.
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Affiliation(s)
- Ki Chul Park
- Laboratory for Advanced Nuclear Energy, Institute of Innovative Research , Tokyo Institute of Technology , Tokyo 152-8550 , Japan
| | - Takehiko Tsukahara
- Laboratory for Advanced Nuclear Energy, Institute of Innovative Research , Tokyo Institute of Technology , Tokyo 152-8550 , Japan
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9
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De Ninno A, De Francesco M. ATR-FTIR study of the isosbestic point in water solution of electrolytes. Chem Phys 2018. [DOI: 10.1016/j.chemphys.2018.08.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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10
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11
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Light TP, Corbett KM, Metrick MA, MacDonald G. Hofmeister Ion-Induced Changes in Water Structure Correlate with Changes in Solvation of an Aggregated Protein Complex. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:1360-1369. [PMID: 26760222 DOI: 10.1021/acs.langmuir.5b04489] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
RecA is a naturally aggregating Escherichia coli protein that catalyzes the strand exchange reaction utilized in DNA repair. Previous studies have shown that the presence of salts influence RecA activity, aggregation, and stability and that salts stabilize RecA in an inverse-anionic Hofmeister series. Here we utilized attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy and circular dichroism (CD) to investigate how various Hofmeister salts alter the water structure and RecA solvation and aggregation. Spectroscopic studies performed in water and deuterium oxide suggest that salts alter water O-(1)H and O-(2)H stretch and bend vibrations as well as protein amide I (or I') and amide II (or II') vibrations. Anions have a much larger influence on water vibrations than cations. Water studies also show increased water-water and/or water-ion interactions in the presence of strongly hydrated SO4(2-) salts and evidence for decreased interactions with weakly hydrated Cl(-) and ClO4(-) salts. Salt-water difference infrared spectra show that kosmotropic salts are more hydrated than chaotropic salts. Interestingly, this is the opposite trend to the changes in protein solvation. Infrared spectra of RecA show that vibrations associated with protein desolvation were observed in the presence of SO4(2-) salts. Conversely, vibrations associated with protein solvation were observed in the presence of Cl(-) and ClO4(-) salts. Difference infrared studies on the dehydration of model proteins aided in identifying changes in RecA-solvent interactions. This study provides evidence that salt-induced changes in water vibrations correlate to changes in protein solvent interactions and thermal stability.
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Affiliation(s)
- Taylor P Light
- Department of Chemistry and Biochemistry, James Madison University , Harrisonburg, Virginia 22807, United States
| | - Karen M Corbett
- Department of Chemistry and Biochemistry, James Madison University , Harrisonburg, Virginia 22807, United States
| | - Michael A Metrick
- Department of Chemistry and Biochemistry, James Madison University , Harrisonburg, Virginia 22807, United States
| | - Gina MacDonald
- Department of Chemistry and Biochemistry, James Madison University , Harrisonburg, Virginia 22807, United States
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12
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Zeng X, Zhang Y, Xia Z, Wang L, Wang C, Huang Y, Shen R, Wen W. Surface evolution of manganese chloride aqueous droplets resulting in self-suppressed evaporation. Sci Rep 2015; 5:13322. [PMID: 26292669 PMCID: PMC4544006 DOI: 10.1038/srep13322] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Accepted: 07/21/2015] [Indexed: 11/25/2022] Open
Abstract
The exchange kinetics of liquid water, which are of fundamental interest and have potential applications, remain unclear. A fantastic and extraordinary phenomenon was observed during the evaporation of a water droplet doped with manganese chloride. As observed from the evolution of this type of droplet, a thin film was formed on the surface with an exothermic phase transition, resulting in self-suppressed evaporation. The MnCl2-doped water droplets were maintained in a relative humidity (RH) of 50% at 40 °C for more than a week and for longer than two months at a temperature of 25 °C. In contrast, a pure water droplet can only be sustained for a few minutes. The self-suppressed evaporation of doped water may be due to the special hydration of the accumulated manganese and chloride ions at the surface, decreasing the surface tension.
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Affiliation(s)
- Xiping Zeng
- Nano Science and Technology Program / Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Yifan Zhang
- Institute of Chemistry, the Chinese Academy of Sciences, Zhongguancun North 1st St, Haidian, Beijing, China
| | - Zengzilu Xia
- Nano Science and Technology Program / Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Li Wang
- Nano Science and Technology Program / Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Cong Wang
- Nano Science and Technology Program / Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Yingzhou Huang
- Chongqing University, No. 174 Shazhengjie, Shapingba, Chongqing, 400044, China
| | - Rong Shen
- Institute of Physics, Chinese Academy of Sciences, Haidian, Beijing, China
| | - Weijia Wen
- Nano Science and Technology Program / Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
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Metrick MA, MacDonald G. Hofmeister ion effects on the solvation and thermal stability of model proteins lysozyme and myoglobin. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.01.038] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Abstract
It is commonly assumed that the structure of water at a lipid-water interface is influenced mostly in the first hydration layer. However, recent results from different experimental methods show that perturbation extends through several hydration layers. Due to its low light penetration depth, attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy is specifically suited to study interlamellar water structure in multibilayers. Results obtained by this technique confirm the long-range water structure disturbance. Consequently, in confined membrane environments nearly all water molecules can be perturbed. It is important to note that the behavior of confined water molecules differs significantly in samples prepared in excess water and in partially hydrated samples. We show in what manner the interlamellar water perturbation is influenced by the hydration level and how it is sequentially modified with a step-by-step dehydration of samples either by water evaporation or by osmotic pressure. Our results also indicate that besides different levels of hydration the lipid-water interaction is modulated by different lipid headgroups and different lipid phases as well. Therefore, modification of interlamellar water properties may clarify the role of water-mediated effects in biological processes.
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Affiliation(s)
- Zoran Arsov
- Laboratory of Biophysics, Department of Solid State Physics, "Jozef Stefan" Institute, Jamova 39, SI-1000, Ljubljana, Slovenia.
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15
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Kojić D, Tsenkova R, Tomobe K, Yasuoka K, Yasui M. Water confined in the local field of ions. Chemphyschem 2014; 15:4077-86. [PMID: 25284338 DOI: 10.1002/cphc.201402381] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Revised: 07/04/2014] [Indexed: 11/09/2022]
Abstract
Interionic distances are shorter in concentrated ionic solutions, thus instigating the interaction and overlap of hydration shells, as ions become separated by only one or two layers of water molecules. The simultaneous interaction of water with two oppositely charged ions has, so far, only been investigated by computer simulation studies, because the isolated vibrational spectroscopic signature of these molecules remains undetected. Our combined near-infrared spectroscopic and molecular dynamics simulation studies of alkali halide solutions present a distinct spectral feature, which is highly responsive to depletion of bulk water and merging of hydration shells. The analysis of this spectral feature demonstrates that absorption trends are in good agreement with the law of matching affinities, thus providing the first successful vibrational spectroscopic treatment of this topic. Combined with commonly observed near-infrared bands, this feature provides a spectral pattern that describes some relevant aspects of ionic hydration.
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Affiliation(s)
- Dušan Kojić
- Center for Medical Genetics, Keio University, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582 (Japan); Department of Pharmacology and Neuroscience, Keio University, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582 (Japan).
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Hua W, Verreault D, Huang Z, Adams EM, Allen HC. Cation Effects on Interfacial Water Organization of Aqueous Chloride Solutions. I. Monovalent Cations: Li+, Na+, K+, and NH4+. J Phys Chem B 2014; 118:8433-40. [PMID: 24798506 DOI: 10.1021/jp503132m] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Wei Hua
- Department of Chemistry & Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - Dominique Verreault
- Department of Chemistry & Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - Zishuai Huang
- Department of Chemistry & Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - Ellen M. Adams
- Department of Chemistry & Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - Heather C. Allen
- Department of Chemistry & Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
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Lin K, Zhou X, Liu S, Luo Y. Identification of Free OH and its Implication on Structural Changes of Liquid Water. CHINESE J CHEM PHYS 2013. [DOI: 10.1063/1674-0068/26/02/121-126] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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18
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Drawing Out the Structural Information About the First Hydration Layer of the Isolated Cl− Anion Through the FTIR-ATR Difference Spectra. J SOLUTION CHEM 2013. [DOI: 10.1007/s10953-013-9970-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Riemenschneider J, Ludwig R. Comment on “Isotope effects in liquid water by infrared spectroscopy. IV. No free OH groups in liquid water” [J. Chem. Phys. 133, 164509 (2010)]. J Chem Phys 2011; 135:117101; author reply 117102. [DOI: 10.1063/1.3624572] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Max JJ, Chapados C. Response to “Comment on ‘Isotope effects in liquid water by infrared spectroscopy. IV. No free OH groups in liquid water’” [J. Chem. Phys. 135, 117101 (2011)]. J Chem Phys 2011. [DOI: 10.1063/1.3640003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Jena KC, Hore DK. Water structure at solid surfaces and its implications for biomolecule adsorption. Phys Chem Chem Phys 2010; 12:14383-404. [DOI: 10.1039/c0cp00260g] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Arsov Z, Rappolt M, Grdadolnik J. Weakened hydrogen bonds in water confined between lipid bilayers: the existence of a long-range attractive hydration force. Chemphyschem 2009; 10:1438-41. [PMID: 19466703 DOI: 10.1002/cphc.200900185] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Stronger or weaker H-bonds? H-bonds in interlamellar water in partially hydrated lipid multibilayers are stronger with respect to bulk water. In contrast, the authors show by ATR-FTIR spectroscopy that the H-bonds are weaker in multibilayers in excess water (see spectra). This finding is of biological relevance for water-mediated phenomena in membranes.
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Affiliation(s)
- Zoran Arsov
- Department of Solid State Physics, Laboratory of Biophysics, Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia.
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Riemenschneider J, Wulf A, Ludwig R. The Effects of Temperature and H/D Isotopic Dilution on the Transmission and Attenuated Total Reflection FTIR Spectra of Water. Z PHYS CHEM 2009. [DOI: 10.1524/zpch.2009.6067] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
Using a set of IR spectroscopy methods the OH- and OD-stretch region of H2O, D2O and HDO were investigated. With a combination of attenuated total reflection infrared (ATR-IR) and transmission infrared Fourier Transform spectroscopy, temperature dependent experiments were carried out. HDO experiments were done with varying isotopic concentrations. We focused on contributions at higher wavenumbers within the OH/OD-stretch region to discuss coupling effects. We also compared results from ATR and transmission spectroscopy in order to check the comparability of these techniques. In addition we tried to investigate how the overtone of the bending vibration may be included into the analysis of the OH-stretch region of pure water.
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