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Li G, Feng W, Corrigan N, Boyer C, Wang X, Xu J. Precise synthesis of poly(N-acryloyl amino acid) through photoinduced living polymerization. Polym Chem 2018. [DOI: 10.1039/c8py00366a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A library of N-acryloylamino acid polymers with controlled molecular weights and narrow molecular weight distributions (Mw/Mn < 1.20) was created by a universal and versatile photoinduced living radical polymerization technique.
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Affiliation(s)
- Guofeng Li
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering
- Beijing Laboratory of Biomedical Materials
- Beijing University of Chemical Technology
- Beijing 100029
- P. R. China
| | - Wenli Feng
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering
- Beijing Laboratory of Biomedical Materials
- Beijing University of Chemical Technology
- Beijing 100029
- P. R. China
| | - Nathaniel Corrigan
- Centre for Advanced Macromolecular Design and Australian Centre for NanoMedicine
- School of Chemical Engineering
- University of New South Wales
- Sydney 2052
- Australia
| | - Cyrille Boyer
- Centre for Advanced Macromolecular Design and Australian Centre for NanoMedicine
- School of Chemical Engineering
- University of New South Wales
- Sydney 2052
- Australia
| | - Xing Wang
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering
- Beijing Laboratory of Biomedical Materials
- Beijing University of Chemical Technology
- Beijing 100029
- P. R. China
| | - Jiangtao Xu
- Centre for Advanced Macromolecular Design and Australian Centre for NanoMedicine
- School of Chemical Engineering
- University of New South Wales
- Sydney 2052
- Australia
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2
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Chaduc I, Lansalot M, D’Agosto F, Charleux B. RAFT Polymerization of Methacrylic Acid in Water. Macromolecules 2012. [DOI: 10.1021/ma2023815] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Isabelle Chaduc
- Laboratoire de Chimie Catalyse Polymères
et
Procédés (C2P2), Université de Lyon 1, CPE Lyon, CNRS UMR 5265, Equipe LCPP Bat 308F, 43
Bd du 11 Novembre 1918, F-69616 Villeurbanne, France
| | - Muriel Lansalot
- Laboratoire de Chimie Catalyse Polymères
et
Procédés (C2P2), Université de Lyon 1, CPE Lyon, CNRS UMR 5265, Equipe LCPP Bat 308F, 43
Bd du 11 Novembre 1918, F-69616 Villeurbanne, France
| | - Franck D’Agosto
- Laboratoire de Chimie Catalyse Polymères
et
Procédés (C2P2), Université de Lyon 1, CPE Lyon, CNRS UMR 5265, Equipe LCPP Bat 308F, 43
Bd du 11 Novembre 1918, F-69616 Villeurbanne, France
| | - Bernadette Charleux
- Laboratoire de Chimie Catalyse Polymères
et
Procédés (C2P2), Université de Lyon 1, CPE Lyon, CNRS UMR 5265, Equipe LCPP Bat 308F, 43
Bd du 11 Novembre 1918, F-69616 Villeurbanne, France
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Lacík I, Učňová L, Kukučková S, Buback M, Hesse P, Beuermann S. Propagation Rate Coefficient of Free-Radical Polymerization of Partially and Fully Ionized Methacrylic Acid in Aqueous Solution. Macromolecules 2009. [DOI: 10.1021/ma9013516] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Igor Lacík
- Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 842 36 Bratislava, Slovakia
| | - Lucia Učňová
- Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 842 36 Bratislava, Slovakia
| | - Silvia Kukučková
- Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 842 36 Bratislava, Slovakia
- Institute of Physical Chemistry, Georg-August-University Göttingen, Tammannstrasse 6, D-37077, Göttingen, Germany
| | - Michael Buback
- Institute of Physical Chemistry, Georg-August-University Göttingen, Tammannstrasse 6, D-37077, Göttingen, Germany
| | - Pascal Hesse
- Institute of Physical Chemistry, Georg-August-University Göttingen, Tammannstrasse 6, D-37077, Göttingen, Germany
| | - Sabine Beuermann
- Institute of Physical Chemistry, Georg-August-University Göttingen, Tammannstrasse 6, D-37077, Göttingen, Germany
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Martín-Molina A, Ibarra-Armenta JG, Quesada-Pérez M. Effect of ion dispersion forces on the electric double layer of colloids: a Monte Carlo simulation study. J Phys Chem B 2009; 113:2414-21. [PMID: 19199701 DOI: 10.1021/jp8019792] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this work, the effect of ionic dispersion forces on the electric double layer of colloids is evaluated through Monte Carlo simulations. Particularly, the influence of these forces on the zeta-potential (as a representative electrokinetic property) is assessed. Ion polarizability is included in the primitive model with the help of the Lifshitz theory. In this way, ion specificity is not considered by means of phenomenological (and unknown a priori) parameters. Our results reveal that the ionic van der Waals forces are responsible (to some extent) for the specificity of the zeta-potential. In any case, the specific ion effects due to ion polarizability are strongly influenced by ion size. Furthermore, a preliminary study on the effect of ionic dehydration shows how this phenomenon improves the qualitative agreement between experimental data and simulations achieved in considering ionic dispersion forces.
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Affiliation(s)
- Alberto Martín-Molina
- Grupo de Física de Fluidos y Biocoloides, Departamento de Física Aplicada, Universidad de Granada, 18071 Granada, Spain
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5
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Gavryushov S. Mediating role of multivalent cations in DNA electrostatics: an epsilon-modified Poisson-Boltzmann study of B-DNA-B-DNA interactions in mixture of NaCl and MgCl2 solutions. J Phys Chem B 2009; 113:2160-9. [PMID: 19199702 DOI: 10.1021/jp809245a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Potentials of mean force acting between two ions in SPC/E water have been determined via molecular dynamics simulations using the spherical cavity approach ( J. Phys. Chem. B 2006 , 110 , 10878 ). The potentials were obtained for Me(2+)-Me(+) pairs, where Me(2+) means cations Mg(2+) and Ca(2+) and Me(+) denotes monovalent ions Li(+), Na(+), and K(+). The hard-core interaction distance for effective Me(2+)-Me(+) potentials appears to be of about 5 A that looks like a sum of the effective radii of a Me(2+) ion (3 A) and of an alkali metal ion Me(+) (about 2 A). These ion-ion interaction parameters were used in the epsilon-Modified Poisson-Boltzmann (epsilon-MPB) calculations ( J. Phys. Chem. B 2007 , 111 , 5264 ) of ionic distributions around DNA generalized for the arbitrary mixture of different ion species. Ionic distributions around an all-atom geometry model of B-DNA in solution of a mixture of NaCl and MgCl(2) were obtained. It was found that even a small fraction of ions Mg(2+) led to sharp condensation of Mg(2+) near the phosphate groups of DNA due to polarization deficiency of cluster [Mg(H(2)O)(6)](2+) in an external field. The epsilon-MPB calculations of the B-DNA-B-DNA interaction energies suggest that adding 1 mM of Mg(2+) to 50 mM solution of NaCl notably affects the force acting between the two macromolecules. Being compared to Poisson-Boltzmann results and to MPB calculations for the primitive model of ions, the epsilon-MPB results also indicate an important contribution of dielectric saturation effects to the mediating role of divalent cations in the DNA-DNA interaction energies.
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Affiliation(s)
- Sergei Gavryushov
- Engelhardt Institute of Molecular Biology, 32 Vavilova St., Moscow, Russia.
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6
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Henderson D, Boda D. Insights from theory and simulation on the electrical double layer. Phys Chem Chem Phys 2009; 11:3822-30. [PMID: 19440608 DOI: 10.1039/b815946g] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Despite the fact that our conceptual understanding of the electrical double layer has advanced during the past few decades, the interpretation of experimental and applied work is still largely based on the venerable Poisson-Boltzmann theory of Gouy, Chapman and Stern. This is understandable since this theory is simple and analytic. However, it is not very accurate because the atomic/molecular nature of the ions/solvent and their correlations are ignored. Simulation and some theoretical studies by ourselves and others that have advanced our understanding are discussed. These studies show that the GCS theory predicts a narrow double layer with monotonic profiles. This is not correct. The double layer is wider, and there can be substantial layering that would be even more pronounced if explicit solvent molecules are considered. For many years, experimental studies of the double layer have been directed to the use of electrochemistry as an analytical tool. This is acceptable for analytic chemistry studies. However, the understanding of electrochemical reactions that typically occur at the electrode surface, where simulation and theory indicate that the GCS theory can have substantial errors, requires modern approaches. New, fundamental experimental studies that would lead to deeper insights using more novel systems would be desirable. Further, biophysics is an interesting field. Recent studies of the selectivity of ion channels and of the adsorption of ions in a binding sites of a protein have shown that the linearized GCS theory has substantial errors.
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Affiliation(s)
- Douglas Henderson
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602, USA.
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7
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Schmitz KS. Macroion Clustering in Solutions and Suspensions: The Roles of Microions and Solvent. J Phys Chem B 2009; 113:2624-38. [DOI: 10.1021/jp805648a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kenneth S. Schmitz
- Department of Chemistry, University of Missouri - Kansas City, Kansas City, Missouri, 64110
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de la Rica R, Fernández-Sánchez C, Jiménez-Jorquera C, Baldi A. Spermine-Induced Hybridization and Charge Inversion at the Diffuse Layer of a DNA-FET. J Phys Chem B 2008; 112:7614-7. [DOI: 10.1021/jp711348m] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Roberto de la Rica
- Departamento de Micro- y Nanosistemas, Centro Nacional de Microelectrónica (CNM-IMB, CSIC), Campus UAB 08193 Bellaterra, Barcelona, Spain
| | - César Fernández-Sánchez
- Departamento de Micro- y Nanosistemas, Centro Nacional de Microelectrónica (CNM-IMB, CSIC), Campus UAB 08193 Bellaterra, Barcelona, Spain
| | - Cecilia Jiménez-Jorquera
- Departamento de Micro- y Nanosistemas, Centro Nacional de Microelectrónica (CNM-IMB, CSIC), Campus UAB 08193 Bellaterra, Barcelona, Spain
| | - Antonio Baldi
- Departamento de Micro- y Nanosistemas, Centro Nacional de Microelectrónica (CNM-IMB, CSIC), Campus UAB 08193 Bellaterra, Barcelona, Spain
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Kim TH, Choi SM, Kline SR. Polymerized rodlike nanoparticles with controlled surface charge density. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2006; 22:2844-50. [PMID: 16519493 DOI: 10.1021/la052949a] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Stable rodlike nanoparticles with highly controlled surface charge density have been developed by the free radical polymerization of the mixture of polymerizable cationic surfactant, cetyltrimethylammonium 4-vinylbenzoate (CTVB), and hydrotropic salt sodium 4-styrenesulfonate (NaSS) in aqueous solution. The surface charge of the polymerized CTVB/NaSS rodlike nanoparticles was controlled by varying the NaSS concentration during the polymerization process, and the charge variation was interpreted in terms of the overcharging effect in colloidal systems. The SANS measurements show that the diameter of the polymerized CTVB/NaSS rodlike nanoparticles is constant at 4 nm and the particle length ranges from 24 to 85 nm, depending on the NaSS concentration. The polymerized particles are longest when the NaSS concentration is 5 mol % which corresponds to the charge inversion or neutral point. The SANS and zeta potential measurements show that the Coulomb interactions between the particles are strongly dependent on the NaSS concentration and the zeta potential of the polymerized CTVB/NaSS nanoparticles changes from positive to negative (+12.8 approximately -44.2 mV) as the concentration of NaSS increases from 0 to 40 mol %. As the NaSS concentration is further increased, the zeta potential is saturated at approximately -50 mV.
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Affiliation(s)
- Tae-Hwan Kim
- Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, 373-1 Guseong-dong, Yuseong-gu, Daejeon, 305-701 Korea
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Martín-Molina A, Quesada-Pérez M, Hidalgo-Alvarez R. Electric Double Layers with Electrolyte Mixtures: Integral Equations Theories and Simulations. J Phys Chem B 2005; 110:1326-31. [PMID: 16471681 DOI: 10.1021/jp053970n] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A study of a planar electric double layer (EDL) in the presence of mixtures of electrolyte is presented. In particular, results from the Hyper-Netted-Chain/Mean-Spherical-Approximation (HNC/MSA) theory are compared with Monte Carlo (MC) simulations. In this way, the charge inversion induced by mixtures of multivalent and monovalent counterions is probed. Since overcharging phenomena in nature emerge under such conditions, the role of ion-ion correlations in the EDL appears as a crucial point in this kind of study. Unlike previous related works, a realistic hydrated ion size is used in the HNC/MSA calculations and simulations. In this way, a qualitative agreement between the results obtained from the theory and MC simulations is found. However, some discrepancies arise when the charge inversion is expected to be more noticeable, namely at high surface charges and/or elevated concentrations of multivalent electrolytes. Such differences are explained in terms of an overestimation of the charge inversion by the integral equation (IE) formalism.
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Affiliation(s)
- A Martín-Molina
- Laboratoire de Physique Statistique de l'Ecole Normale Supérieure associée au CNRS, Universités Paris VI et Paris VII, 24 rue Lhomond, 75231 Paris Cedex 05, France
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Quesada-Pérez M, Martín-Molina A, Hidalgo-Alvarez R. Simulation of electric double layers undergoing charge inversion: mixtures of mono- and multivalent ions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2005; 21:9231-7. [PMID: 16171356 DOI: 10.1021/la0505925] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
In this paper, the electric double layer (EDL) of a charged plane in the presence of mixtures of 1:1 and 3:1 electrolytes has been investigated through Monte Carlo (MC) simulations using a nonrestrictive primitive model of EDL. In particular, the charge inversion in colloids (attributable to an accumulation of counterions on the surface) can be better understood by means of the simulations performed here. Moreover, two mechanisms proposed for charge inversion are probed: The formation of a strongly correlated layer (SCL) of multivalent counterions and excluded volume effects (to which we will also refer as ion size correlations). Our results are in agreement with the behavior found experimentally for some model colloids with increasing the concentration of monovalent salt in the presence of trivalent ions, which clearly supports the relevance of ion size correlations. In contrast, certain disagreement with predictions of SCL theories is reported.
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Affiliation(s)
- M Quesada-Pérez
- Departamento de Física, Universidad de Jaén, Escuela Universitaria Politécnica, 23700 Linares, Jaén, Spain
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