1
|
Hydration of the Neurotransmitter γ-Aminobutyric Acid and its Isomer α-Aminobutyric Acid. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
|
2
|
Hartl J, Friesen S, Johannsmann D, Buchner R, Hinderberger D, Blech M, Garidel P. Dipolar Interactions and Protein Hydration in Highly Concentrated Antibody Formulations. Mol Pharm 2022; 19:494-507. [PMID: 35073097 DOI: 10.1021/acs.molpharmaceut.1c00587] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Molecular interaction mechanisms in high-concentrated protein systems are of fundamental importance for the rational development of biopharmaceuticals such as monoclonal antibody (mAb) formulations. In such high-concentrated protein systems, the intermolecular distances between mAb molecules are reduced to the size of the protein diameter (approx. 10 nm). Thus, protein-protein interactions are more pronounced at high concentrations; so a direct extrapolation of physicochemical properties obtained from measurements at a low protein concentration of the corresponding properties at a high protein concentration is highly questionable. Besides the charge-charge interaction, the effects of molecular crowding, dipolar interaction, changes in protein hydration, and self-assembling tendency become more relevant. Here, protein hydration, protein dipole moment, and protein-protein interactions were studied in protein concentrations up to 200 mg/mL (= 1.3 mM) in different formulations for selected mAbs using dielectric relaxation spectroscopy (DRS). These data are correlated with the second virial coefficient, A2, the diffusion interaction parameter, kD, the elastic shear modulus, G', and the dynamic viscosity, η. When large contributions of dipolar protein-protein interactions were observed, the tendency of self-assembling and an increase in solution viscosity were detected. These effects were examined using specific buffer conditions. Furthermore, different types of protein-water interactions were identified via DRS, whereby the effect of high protein concentration on protein hydration was investigated for different high-concentrated liquid formulations (HCLFs).
Collapse
Affiliation(s)
- Josef Hartl
- Institute of Chemistry, Martin-Luther-University Halle-Wittenberg, 06120 Halle (Saale), Germany
| | - Sergej Friesen
- Institute of Physical and Theoretical Chemistry, University of Regensburg, 93053 Regensburg, Germany
| | - Diethelm Johannsmann
- Institute of Physical Chemistry, Clausthal University of Technology, 38678 Clausthal-Zellerfeld, Germany
| | - Richard Buchner
- Institute of Physical and Theoretical Chemistry, University of Regensburg, 93053 Regensburg, Germany
| | - Dariush Hinderberger
- Institute of Chemistry, Martin-Luther-University Halle-Wittenberg, 06120 Halle (Saale), Germany
| | - Michaela Blech
- Boehringer Ingelheim Pharma GmbH & Co. KG, Innovation Unit, PDB, 88397 Biberach an der Riss, Germany
| | - Patrick Garidel
- Boehringer Ingelheim Pharma GmbH & Co. KG, Innovation Unit, PDB, 88397 Biberach an der Riss, Germany
| |
Collapse
|
3
|
Rohman N, Mohiuddin T. Dielectric Relaxation of Decyltrimethylammonium Bromide-Water-Styrene Oil-in-Water Microemulsion. J SOLUTION CHEM 2021. [DOI: 10.1007/s10953-021-01108-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
4
|
Deshmukh A, Kumbharkhane A. Dielectric relaxation study of aqueous diethylamine using a time domain reflectometry. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
5
|
Yoon TJ, Vigil MJ, Raby EY, Singh RP, Maerzke KA, Currier RP, Findikoglu AT. Dielectric relaxation of neodymium chloride in water and in methanol. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.112981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
6
|
Musale SP, Kumbharkhane AC, Dagade DH. Dielectric Relaxation and Hydration Interactions for Protic and Aprotic Ionic Liquids using Time Domain Reflectometry. J Phys Chem B 2019; 123:8976-8986. [PMID: 31566973 DOI: 10.1021/acs.jpcb.9b07914] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
H-Bonding abilities of ionic liquids (ILs) along with hydrophobicity and cooperativity effects increases their hydration numbers making them capable for dissolving sparingly soluble organic molecules in aqueous or polar nonaqueous media, and hence ILs are potential candidates in pharmaceutical and medicinal sciences besides the different technological and academic interests. In this work, dielectric spectra were measured and analyzed for diethylammonium-based protic ionic liquids (PILs), imidazolium-based aprotic ionic liquids (APILs), and their aqueous solutions (∼0.02 to ∼0.8 mol·dm-3) over a frequency range from 0.01 to 50 GHz using time domain reflectometry at 298.15 K. The Cole-Cole (CC) model for neat ILs and a combination of the Debye and Cole-Cole (D+CC) models for their aqueous solutions best describes the experimental dielectric relaxation spectra. Higher values of static permittivity and relaxation time were observed for less viscous PILs compared to more viscous APILs due to the existence of hydrogen bonding in PILs, ionic translational motion, and the existence of transient, short-lived proton transfer responsible for solvent polarization. For aqueous solutions of ionic liquids, the fast collective relaxation of solvent (bulk water) observed at higher frequencies (∼20 GHz) and slow relaxation is detected at lower frequency (∼5 to ∼10 GHz) due to hydrophobic hydration with or without cooperative H-bonding effect. The apparent concentrations of bulk water, cbwap, and slow water, cswap, were used to obtain effective hydration numbers to understand the ion solvation. Hydration numbers revealed that imidazolium-based APILs are weakly hydrated than the diethylammonium-based PILs. Static permittivity and relaxation time of pure ILs and of aqueous solutions of studied ILs are discussed in terms of effect on alkyl chain length of cation/anion, H-bonding abilities of ions, dipole moments of ions, viscosity, hydrophobic effects, etc.
Collapse
Affiliation(s)
- Shrikant P Musale
- Department of Chemistry , Shivaji University , Kolhapur 416004 , India
| | - Ashok C Kumbharkhane
- School of Physical Sciences , Swami Ramanand Teerth Marathwada University , Nanded 431606 , India
| | - Dilip H Dagade
- Department of Chemistry , Shivaji University , Kolhapur 416004 , India
| |
Collapse
|
7
|
Kalaivani T, Krishnan S, Nithiyanantham S. Physico-chemical and dielectric relaxation studies of ionic surfactants in Time Domain Reflectometry (TDR). KOREAN J CHEM ENG 2017. [DOI: 10.1007/s11814-017-0138-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
8
|
Dmitrieva OA, Fedotova MV, Buchner R. Evidence for cooperative Na+ and Cl− binding by strongly hydrated l-proline. Phys Chem Chem Phys 2017; 19:20474-20483. [DOI: 10.1039/c7cp04335j] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Strongly hydrated l-proline cooperatively binds Na+ and Cl− ions in aqueous solution.
Collapse
Affiliation(s)
- Olga A. Dmitrieva
- G.A. Krestov Institute of Solution Chemistry
- Russian Academy of Sciences
- 153045 Ivanovo
- Russian Federation
| | - Marina V. Fedotova
- G.A. Krestov Institute of Solution Chemistry
- Russian Academy of Sciences
- 153045 Ivanovo
- Russian Federation
| | - Richard Buchner
- Institut für Physikalische und Theoretische Chemie
- Universität Regensburg
- 93040 Regensburg
- Germany
| |
Collapse
|
9
|
Stoppa A, Nazet A, Buchner R, Thoman A, Walther M. Dielectric response and collective dynamics of acetonitrile. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2015.03.045] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
10
|
Sonnleitner T, Turton DA, Waselikowski S, Hunger J, Stoppa A, Walther M, Wynne K, Buchner R. Dynamics of RTILs: A comparative dielectric and OKE study. J Mol Liq 2014. [DOI: 10.1016/j.molliq.2013.09.019] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
11
|
Hunger J, Tielrooij KJ, Buchner R, Bonn M, Bakker HJ. Complex Formation in Aqueous Trimethylamine-N-oxide (TMAO) Solutions. J Phys Chem B 2012; 116:4783-95. [DOI: 10.1021/jp212542q] [Citation(s) in RCA: 115] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Johannes Hunger
- FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz,
Germany
| | | | - Richard Buchner
- Institut für
Physikalische
und Theoretische Chemie, Universität Regensburg, 93040 Regensburg, Germany
| | - Mischa Bonn
- FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz,
Germany
| | - Huib J. Bakker
- FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands
| |
Collapse
|
12
|
Zagrebin PA, Buchner R, Nazmutdinov RR, Tsirlina GA. Dynamic Solvent Effects in Electrochemical Kinetics: Indications for a Switch of the Relevant Solvent Mode. J Phys Chem B 2009; 114:311-20. [PMID: 20000826 DOI: 10.1021/jp907479z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Pavel A. Zagrebin
- Department of Electrochemistry, Moscow State University, Leninskie Gory 1-str.3, 119991 Moscow, Russian Federation, Institute of Physical and Theoretical Chemistry, University of Regensburg, 93040 Regensburg, Germany, and Kazan State Technological University, K. Marx Str., 68, 420015 Kazan, Republic Tatarstan, Russian Federation
| | - Richard Buchner
- Department of Electrochemistry, Moscow State University, Leninskie Gory 1-str.3, 119991 Moscow, Russian Federation, Institute of Physical and Theoretical Chemistry, University of Regensburg, 93040 Regensburg, Germany, and Kazan State Technological University, K. Marx Str., 68, 420015 Kazan, Republic Tatarstan, Russian Federation
| | - Renat R. Nazmutdinov
- Department of Electrochemistry, Moscow State University, Leninskie Gory 1-str.3, 119991 Moscow, Russian Federation, Institute of Physical and Theoretical Chemistry, University of Regensburg, 93040 Regensburg, Germany, and Kazan State Technological University, K. Marx Str., 68, 420015 Kazan, Republic Tatarstan, Russian Federation
| | - Galina A. Tsirlina
- Department of Electrochemistry, Moscow State University, Leninskie Gory 1-str.3, 119991 Moscow, Russian Federation, Institute of Physical and Theoretical Chemistry, University of Regensburg, 93040 Regensburg, Germany, and Kazan State Technological University, K. Marx Str., 68, 420015 Kazan, Republic Tatarstan, Russian Federation
| |
Collapse
|
13
|
Lukšič M, Buchner R, Hribar-Lee B, Vlachy V. Dielectric Relaxation Spectroscopy of Aliphatic Ionene Bromides and Fluorides in Water: The Role of the Polyion’s Charge Density and the Nature of the Counterions. Macromolecules 2009. [DOI: 10.1021/ma900097c] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Miha Lukšič
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Aškerčeva c. 5, SI-1000 Ljubljana, Slovenia
| | - Richard Buchner
- Institute for Physical and Theoretical Chemistry, University of Regensburg, Universitätstrasse 31, D-93040 Regensburg, Germany
| | - Barbara Hribar-Lee
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Aškerčeva c. 5, SI-1000 Ljubljana, Slovenia
| | - Vojko Vlachy
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Aškerčeva c. 5, SI-1000 Ljubljana, Slovenia
| |
Collapse
|
14
|
Dou S, Colby RH. Solution Rheology of a Strongly Charged Polyelectrolyte in Good Solvent. Macromolecules 2008. [DOI: 10.1021/ma8001438] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shichen Dou
- Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - Ralph H. Colby
- Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802
| |
Collapse
|
15
|
Stoppa A, Hunger J, Buchner R, Hefter G, Thoman A, Helm H. Interactions and Dynamics in Ionic Liquids. J Phys Chem B 2008; 112:4854-8. [DOI: 10.1021/jp800852z] [Citation(s) in RCA: 149] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
| | | | | | - Glenn Hefter
- ChemistryDSE, Murdoch University, Murdoch, W.A. 6150, Australia
| | | | | |
Collapse
|
16
|
Eberspächer P, Wismeth E, Buchner R, Barthel J. Ion association of alkaline and alkaline-earth metal perchlorates in acetonitrile. J Mol Liq 2006. [DOI: 10.1016/j.molliq.2006.08.007] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
17
|
Wurm B, Baar C, Buchner R, Barthel J. Dielectric relaxation spectroscopy of ion–solvent interactions in formamide and N-methylformamide. J Mol Liq 2006. [DOI: 10.1016/j.molliq.2006.03.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
18
|
Schrödle S, Hefter G, Kunz W, Buchner R. Effects of nonionic surfactant C12E5 on the cooperative dynamics of water. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2006; 22:924-32. [PMID: 16430250 DOI: 10.1021/la0519711] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
A dielectric relaxation study of binary mixtures of nonionic surfactant C12E5 + water has been made as a function of temperature in the isotropic micellar, lamellar, and hexagonal regions of the phase diagram. Two dielectric dispersion steps were found and could be assigned to the intermolecular cooperative dynamics of water at the micellar interface and in the bulk water domains. A quantitative analysis is given. The relaxation amplitudes were used to determine effective hydration numbers. The activation energies of water relaxation were calculated from the relaxation times. The data indicate weaker surfactant-water and water-water interactions near the micellar interface compared to those of bulk liquid water. Further analysis revealed the presence of water clusters large enough to show a cooperative relaxation mode even at high surfactant concentrations. However, the relaxation time of this mode is larger compared to that of pure water. This points out the importance of confinement effects on water dynamics.
Collapse
Affiliation(s)
- Simon Schrödle
- Institut für Physikalische und Theoretische Chemie, Universität Regensburg, D-93040 Regensburg, Germany
| | | | | | | |
Collapse
|
19
|
Wurm B, Münsterer M, Richardi J, Buchner R, Barthel J. Ion association and solvation of perchlorate salts in N,N-dimethylformamide and N,N-dimethylacetamide. J Mol Liq 2005. [DOI: 10.1016/j.molliq.2004.10.015] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
20
|
Buchner R, Baar C, Fernandez P, Schrödle S, Kunz W. Dielectric spectroscopy of micelle hydration and dynamics in aqueous ionic surfactant solutions. J Mol Liq 2005. [DOI: 10.1016/j.molliq.2004.07.035] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
21
|
Dielectric relaxation spectroscopy of aqueous amino acid solutions: dynamics and interactions in aqueous glycine. J Mol Liq 2005. [DOI: 10.1016/j.molliq.2004.08.001] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
22
|
Sato T, Buchner R. Cooperative and molecular dynamics of alcohol/water mixtures: the view of dielectric spectroscopy. J Mol Liq 2005. [DOI: 10.1016/j.molliq.2004.08.015] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
23
|
Affiliation(s)
- Takaaki Sato
- Division of Pure and Applied Physics, Graduate School of Science and Engineering, Waseda University, Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
| | - Richard Buchner
- Institut für Physikalische und Theoretische Chemie, Universität Regensburg, D-93040 Regensburg, Germany
| |
Collapse
|
24
|
Schrödle S, Buchner R, Kunz W. Effect of the Chain Length on the Inter- and Intramolecular Dynamics of Liquid Oligo(ethylene glycol)s. J Phys Chem B 2004; 108:6281-7. [DOI: 10.1021/jp037937h] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Simon Schrödle
- Institut für Physikalische und Theoretische Chemie, Universität Regensburg, D-93040 Regensburg, Germany
| | - Richard Buchner
- Institut für Physikalische und Theoretische Chemie, Universität Regensburg, D-93040 Regensburg, Germany
| | - Werner Kunz
- Institut für Physikalische und Theoretische Chemie, Universität Regensburg, D-93040 Regensburg, Germany
| |
Collapse
|
25
|
Sato T, Buchner R. The cooperative dynamics of the H-bond system in 2-propanol/water mixtures: Steric hindrance effects of nonpolar head group. J Chem Phys 2003. [DOI: 10.1063/1.1620996] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
26
|
Fernandez P, Schrödle S, Buchner R, Kunz W. Micelle and Solvent Relaxation in Aqueous Sodium Dodecylsulfate Solutions. Chemphyschem 2003; 4:1065-72. [PMID: 14596003 DOI: 10.1002/cphc.200300725] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Dielectric spectra have been measured for aqueous sodium dodecylsulfate (SDS) solutions up to 0.1 mol L-1 at 25 degrees C over the frequency range 0.005 < or = nu GHz-1 < or = 89. The spectra exhibit two relaxation processes at approximately 0.03 GHz and 0.2 GHz associated with the presence of micelles in addition to the dominant solvent relaxation process at approximately 18 GHz and a small contribution at approximately 1.8 GHz due to H2O molecules hydrating the micelles. Detailed analysis reveals that the micelles bind 20 water molecules per SDS unit, but not as strongly as trimethylalkylammonium halide surfactants do. The relaxation times and amplitudes of both micelle relaxation processes can be simultaneously analysed with the theory of Grosse, yielding the effective volume of a SDS unit in the micelle and the lateral diffusion coefficient of the bound counterions. The findings of this investigation fully corroborate recent molecular dynamics simulations on structure and dynamics of SDS micelles.
Collapse
Affiliation(s)
- Patrick Fernandez
- Institut für Physikalische und Theoretische Chemie Universität Regensburg, 93040 Regensburg, Germany
| | | | | | | |
Collapse
|
27
|
Sato T, Buchner R. Dielectric relaxation spectroscopy of 2-propanol–water mixtures. J Chem Phys 2003. [DOI: 10.1063/1.1543137] [Citation(s) in RCA: 97] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
28
|
The dynamics of liquid formamide, N-methylformamide, N,N-dimethylformamide, and N,N-dimethylacetamide. A dielectric relaxation study. J Mol Liq 2002. [DOI: 10.1016/s0167-7322(01)00309-9] [Citation(s) in RCA: 107] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
29
|
Baar C, Buchner R, Kunz W. Dielectric Relaxation of Cationic Surfactants in Aqueous Solution. 1. Solvent Relaxation. J Phys Chem B 2001. [DOI: 10.1021/jp002884e] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Christian Baar
- Institut für Physikalische und Theoretische Chemie, Universität Regensburg, D-93040 Regensburg, Germany
| | - Richard Buchner
- Institut für Physikalische und Theoretische Chemie, Universität Regensburg, D-93040 Regensburg, Germany
| | - Werner Kunz
- Institut für Physikalische und Theoretische Chemie, Universität Regensburg, D-93040 Regensburg, Germany
| |
Collapse
|
30
|
Barthel J, Buchner R, Hölzl C, Münsterer M. Dynamics of Benzonitrile, Propylene Carbonate and Butylene Carbonate: the Influence of Molecular Shape and Flexibility on the Dielectric Relaxation Behaviour of Dipolar Aprotic Liquids. ACTA ACUST UNITED AC 2000. [DOI: 10.1524/zpch.2000.214.9.1213] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The results of dielectric relaxation experiments on benzonitrile, propylene carbonate and butylene carbonate, performed between 228.15 K and 338.15 K in the frequency range 0.1 ≤ ν /GHz ≤ 89 are presented. The spectra of the three liquids can be formally fitted with two relaxation processes. The long relaxation time, τ
Collapse
|
31
|
|
32
|
Buchner R, Capewell SG, Hefter G, May PM. Ion-Pair and Solvent Relaxation Processes in Aqueous Na2SO4 Solutions. J Phys Chem B 1999. [DOI: 10.1021/jp983706c] [Citation(s) in RCA: 133] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Richard Buchner
- Chemistry Department, Division of Science, Murdoch University, Murdoch, W.A. 6150, Australia
| | - Stephen G. Capewell
- Chemistry Department, Division of Science, Murdoch University, Murdoch, W.A. 6150, Australia
| | - Glenn Hefter
- Chemistry Department, Division of Science, Murdoch University, Murdoch, W.A. 6150, Australia
| | - Peter M. May
- Chemistry Department, Division of Science, Murdoch University, Murdoch, W.A. 6150, Australia
| |
Collapse
|
33
|
Barthel J, Buchner R, Eberspächer PN, Münsterer M, Stauber J, Wurm B. Dielectric relaxation spectroscopy of electrolyte solutions. Recent developments and prospects. J Mol Liq 1998. [DOI: 10.1016/s0167-7322(98)00085-3] [Citation(s) in RCA: 104] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
34
|
Nomura H, Koda S, Matsuoka T, Noudou T, Buchner R, Barthel J. Cooperative motion of liquids in the strong interaction field. J Mol Liq 1998. [DOI: 10.1016/s0167-7322(98)00081-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|