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Vaissier V, Sakai VG, Li X, Cabral JT, Nelson J, Barnes PRF. How mobile are dye adsorbates and acetonitrile molecules on the surface of TiO 2 nanoparticles? A quasi-elastic neutron scattering study. Sci Rep 2016; 6:39253. [PMID: 27991538 PMCID: PMC5171786 DOI: 10.1038/srep39253] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Accepted: 11/22/2016] [Indexed: 01/01/2023] Open
Abstract
Motions of molecules adsorbed to surfaces may control the rate of charge transport within monolayers in systems such as dye sensitized solar cells. We used quasi-elastic neutron scattering (QENS) to evaluate the possible dynamics of two small dye moieties, isonicotinic acid (INA) and bis-isonicotinic acid (BINA), attached to TiO2 nanoparticles via carboxylate groups. The scattering data indicate that moieties are immobile and do not rotate around the anchoring groups on timescales between around 10 ps and a few ns (corresponding to the instrumental range). This gives an upper limit for the rate at which conformational fluctuations can assist charge transport between anchored molecules. Our observations suggest that if the conformation of larger dye molecules varies with time, it does so on longer timescales and/or in parts of the molecule which are not directly connected to the anchoring group. The QENS measurements also indicate that several layers of acetonitrile solvent molecules are immobilized at the interface with the TiO2 on the measurement time scale, in reasonable agreement with recent classical molecular dynamics results.
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Affiliation(s)
- Valerie Vaissier
- Department of Physcis, Imperial College London, London, SW72AZ, United Kingdom
- Centre for Plastics Electronics, Imperial College London, SW72AZ, United Kingdom
| | - Victoria Garcia Sakai
- ISIS Pulsed neutron and Muon Source, Rutherford Appleton Laboratory, Didcot, OX11 0QX, United Kingdom
| | - Xiaoe Li
- Department of Chemistry, Imperial College London, London, SW72AZ, United Kingdom
| | - João T. Cabral
- Centre for Plastics Electronics, Imperial College London, SW72AZ, United Kingdom
- Department of Chemical Engineering, Imperial College London, London, SW72AZ, United Kingdom
| | - Jenny Nelson
- Department of Physcis, Imperial College London, London, SW72AZ, United Kingdom
- Centre for Plastics Electronics, Imperial College London, SW72AZ, United Kingdom
| | - Piers R. F. Barnes
- Department of Physcis, Imperial College London, London, SW72AZ, United Kingdom
- Centre for Plastics Electronics, Imperial College London, SW72AZ, United Kingdom
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Roy S, Yashonath S, Bagchi B. Mode coupling theory analysis of electrolyte solutions: Time dependent diffusion, intermediate scattering function, and ion solvation dynamics. J Chem Phys 2015; 142:124502. [DOI: 10.1063/1.4915274] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Affiliation(s)
- Susmita Roy
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012, India
| | - Subramanian Yashonath
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012, India
| | - Biman Bagchi
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012, India
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Chhih A, Turq P, Bernard O, Barthel JMG, Blum L. Transport coefficients and apparent charges of concentrated electrolyte solutions - Equations for practical use. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19940981204] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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4
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Vrbka L, Lund M, Kalcher I, Dzubiella J, Netz RR, Kunz W. Ion-specific thermodynamics of multicomponent electrolytes: A hybrid HNC/MD approach. J Chem Phys 2009; 131:154109. [DOI: 10.1063/1.3248218] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Dufrêche JF, Jardat M, Turq P, Bagchi B. Electrostatic Relaxation and Hydrodynamic Interactions for Self-Diffusion of Ions in Electrolyte Solutions. J Phys Chem B 2008; 112:10264-71. [DOI: 10.1021/jp801796g] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- J.-F. Dufrêche
- Laboratoire Liquides Ioniques et Interfaces Chargées, case courrier 51, Université P. et M. Curie - Paris 6, CNRS, 4 place Jussieu, 75252 Paris Cedex 05, France and Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore, India 560012
| | - M. Jardat
- Laboratoire Liquides Ioniques et Interfaces Chargées, case courrier 51, Université P. et M. Curie - Paris 6, CNRS, 4 place Jussieu, 75252 Paris Cedex 05, France and Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore, India 560012
| | - P. Turq
- Laboratoire Liquides Ioniques et Interfaces Chargées, case courrier 51, Université P. et M. Curie - Paris 6, CNRS, 4 place Jussieu, 75252 Paris Cedex 05, France and Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore, India 560012
| | - B. Bagchi
- Laboratoire Liquides Ioniques et Interfaces Chargées, case courrier 51, Université P. et M. Curie - Paris 6, CNRS, 4 place Jussieu, 75252 Paris Cedex 05, France and Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore, India 560012
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Dufrêche JF, Bernard O, Durand-Vidal S, Turq P. Analytical theories of transport in concentrated electrolyte solutions from the MSA. J Phys Chem B 2007; 109:9873-84. [PMID: 16852194 DOI: 10.1021/jp050387y] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Ion transport coefficients in electrolyte solutions (e.g., diffusion coefficients or electric conductivity) have been a subject of extensive studies for a long time. Whereas in the pioneering works of Debye, Hückel, and Onsager the ions were entirely characterized by their charge, recent theories allow specific effects of the ions (such as the ion size dependence or the pair association) to be obtained, both from simulation and from analytical theories. Such an approach, based on a combination of dynamic theories (Smoluchowski equation and mode-coupling theory) and of the mean spherical approximation (MSA) for the equilibrium pair correlation, is presented here. The various predicted equilibrium (osmotic pressure and activity coefficients) and transport coefficients (mutual diffusion, electric conductivity, self-diffusion, and transport numbers) are in good agreement with the experimental values up to high concentrations (1-2 mol L(-1)). Simple analytical expressions are obtained, and for practical use, the formula are given explicitly. We discuss the validity of such an approach which is nothing but a coarse-graining procedure.
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Affiliation(s)
- J-F Dufrêche
- Laboratoire Liquides Ioniques et Interfaces Chargées, boite postale 51, Université P. et M. Curie, 4 place Jussieu, F-75252 Paris Cedex 05, France.
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Dufrêche JF, Bernard O, Turq P, Mukherjee A, Bagchi B. Ionic self-diffusion in concentrated aqueous electrolyte solutions. PHYSICAL REVIEW LETTERS 2002; 88:095902. [PMID: 11864029 DOI: 10.1103/physrevlett.88.095902] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2001] [Indexed: 05/23/2023]
Abstract
A self-consistent microscopic theory is developed to understand the anomalously weak concentration dependence of ionic self-diffusion coefficient D(ion) in electrolyte solutions. The self-consistent equations are solved by using the mean spherical approximation expressions of the static pair correlation functions for unequal sizes. The results are in excellent agreement both with the known experimental results for many binary electrolytes and also with the new Brownian dynamics simulation results. The calculated velocity time correlation functions also show quantitative agreement with simulations. The theory also explains the reason for observing different D(ion) in recent NMR and neutron scattering experiments.
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Affiliation(s)
- J-F Dufrêche
- Laboratoire LI2C Université Pierre et Marie Curie, Bat F, case 51, 75252 Paris Cedex 05, France
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Jurczok M, Gustavsson T, Mialocq JC, Rettig W. Electron transfer and solvation in 9,9′-bianthryl and derivatives: a sub-ps fluorescence upconversion study. Chem Phys Lett 2001. [DOI: 10.1016/s0009-2614(01)00809-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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9
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Cartailler T, Hanna M, Turq P. Translational rotational coupled motions in molten lithium nitrate. J Mol Liq 1999. [DOI: 10.1016/s0167-7322(99)00069-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Jardat M, Bernard O, Treiner C, Turq P. Electrical Conductance of Cryptate Solutions: Comparison between Experiments and Simulation Results. J Phys Chem B 1999. [DOI: 10.1021/jp991350e] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- M. Jardat
- Laboratoire Liquides Ioniques et Interfaces Chargées, boîte postale 51, Université P. et M. Curie, 4 place Jussieu, F-75252 Paris Cedex 05, France
| | - O. Bernard
- Laboratoire Liquides Ioniques et Interfaces Chargées, boîte postale 51, Université P. et M. Curie, 4 place Jussieu, F-75252 Paris Cedex 05, France
| | - C. Treiner
- Laboratoire Liquides Ioniques et Interfaces Chargées, boîte postale 51, Université P. et M. Curie, 4 place Jussieu, F-75252 Paris Cedex 05, France
| | - P. Turq
- Laboratoire Liquides Ioniques et Interfaces Chargées, boîte postale 51, Université P. et M. Curie, 4 place Jussieu, F-75252 Paris Cedex 05, France
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Bordes B, Coletta F, Ferrarini A, Gottardi F, Nordio P. 13C NMR relaxation in neutral and charged tetra-n-alkyl compounds. Chem Phys 1998. [DOI: 10.1016/s0301-0104(98)00086-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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12
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Kunz W, Calmettes P, Cartailler T, Turq P. Comment on ‘‘Integral equation theory for charged liquids: The structure of macroions in solution and the inversion of experimental data’’ [J. Chem. Phys. 100, 2244 (1994)]. J Chem Phys 1995. [DOI: 10.1063/1.468574] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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13
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Barthel J, Klein L, Kunz W, Calmettes P, Turq P. Tetraalkylammonium bromides in methanol: Small angle neutron scattering and vapor pressure measurements. J SOLUTION CHEM 1994. [DOI: 10.1007/bf00974097] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Kunz W, Calmettes P, Bellissent‐Funel M. Dynamics of liquid acetonitrile at high frequencies. J Chem Phys 1993. [DOI: 10.1063/1.465273] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Kunz W, Calmettes P, Turq P, Cartailler T, Morel‐Desrosiers N, Morel J. Pair correlation functions of uncharged and weakly charged Brownian particles. J Chem Phys 1992. [DOI: 10.1063/1.463773] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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