1
|
Markelov DA, Semisalova AS, Mazo MA. Formation of a Hollow Core in Dendrimers in Solvents. MACROMOL CHEM PHYS 2021. [DOI: 10.1002/macp.202100085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Denis A. Markelov
- Saint Petersburg State University Universitetskaya nab. 7/9 St. Petersburg 199034 Russia
| | - Anna S. Semisalova
- Faculty of Physics and CENIDE University of Duisburg‐Essen Lotharstr. 1 Duisburg 47057 Germany
| | - Mikhail A. Mazo
- Semenov Institute of Chemical Physics Russian Academy of Sciences Kosygina 4 Moscow 119991 Russia
| |
Collapse
|
2
|
Huang GR, Tung CH, Chang D, Lam CN, Do C, Shinohara Y, Chang SY, Wang Y, Hong K, Chen WR. Determining population densities in bimodal micellar solutions using contrast-variation small angle neutron scattering. J Chem Phys 2020; 153:184902. [PMID: 33187411 DOI: 10.1063/5.0024410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Self-assembly of amphiphilic polymers in water is of fundamental and practical importance. Significant amounts of free unimers and associated micellar aggregates often coexist over a wide range of phase regions. The thermodynamic and kinetic properties of the microphase separation are closely related to the relative population density of unimers and micelles. Although the scattering technique has been employed to identify the structure of micellar aggregates as well as their time-evolution, the determination of the population ratio of micelles to unimers remains a challenging problem due to their difference in scattering power. Here, using small-angle neutron scattering (SANS), we present a comprehensive structural study of amphiphilic n-dodecyl-PNIPAm polymers, which shows a bimodal size distribution in water. By adjusting the deuterium/hydrogen ratio of water, the intra-micellar polymer and water distributions are obtained from the SANS spectra. The micellar size and number density are further determined, and the population densities of micelles and unimers are calculated to quantitatively address the degree of micellization at different temperatures. Our method can be used to provide an in-depth insight into the solution properties of microphase separation, which are present in many amphiphilic systems.
Collapse
Affiliation(s)
- Guan-Rong Huang
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Chi-Huan Tung
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Dongsook Chang
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Christopher N Lam
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Changwoo Do
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Yuya Shinohara
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Shou-Yi Chang
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Yangyang Wang
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Kunlun Hong
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Wei-Ren Chen
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| |
Collapse
|
3
|
Li TF, Cheng YY, Wang Y, Wang H, Chen DF, Liu YT, Zhang L, Han WZ, Liu RD, Wang ZJ, Yang CM, Jafta CJ, Clemens D, Keiderling U. Analysis of Dimer Impurity in Polyamidoamine Dendrimer Solutions by Small-angle Neutron Scattering. CHINESE JOURNAL OF POLYMER SCIENCE 2019. [DOI: 10.1007/s10118-019-2260-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
4
|
Flexibility and Hydration of Amphiphilic Hyperbranched Arabinogalactan-Protein from Plant Exudate: A Volumetric Perspective. COLLOIDS AND INTERFACES 2018. [DOI: 10.3390/colloids2010011] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
5
|
Arbeloa EM, Previtali CM, Bertolotti SG. A Comparative Study on the Photophysics and Photochemistry of Xanthene Dyes in the Presence of Polyamidoamine (PAMAM) Dendrimers. Chemphyschem 2018; 19:934-942. [DOI: 10.1002/cphc.201701295] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Indexed: 01/14/2023]
Affiliation(s)
- Ernesto Maximiliano Arbeloa
- Grupo de Fotoquímica; Departmento de Química; Universidad Nacional de Río Cuarto, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); 5800 Río Cuarto Córdoba Argentina
| | - Carlos Mario Previtali
- Grupo de Fotoquímica; Departmento de Química; Universidad Nacional de Río Cuarto, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); 5800 Río Cuarto Córdoba Argentina
| | - Sonia Graciela Bertolotti
- Grupo de Fotoquímica; Departmento de Química; Universidad Nacional de Río Cuarto, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); 5800 Río Cuarto Córdoba Argentina
| |
Collapse
|
6
|
Tokarczyk K, Jachimska B. Quantitative interpretation of PAMAM dendrimers adsorption on silica surface. J Colloid Interface Sci 2017; 503:86-94. [PMID: 28500943 DOI: 10.1016/j.jcis.2017.05.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Revised: 04/16/2017] [Accepted: 05/01/2017] [Indexed: 01/30/2023]
Abstract
Understanding the dendrimer-solid support interaction is of great importance for dendrimer-based drug delivery system design. The maximum surface coverage on a hydrophilic silica surface was determined using the quartz crystal microbalance with dissipation monitoring (QCM-D) and multi-parametric surface plasmon resonance (MP-SPR) methods: the adsorption process depends on ionic strength and pH of solutions. The effectiveness of G6 adsorption is mainly determined by the range of electrostatic inter-dendrimer interactions and dendrimer-silica surface interactions. Changes in ionic strength have a strong effect on the binding affinity of dendrimers to the surface. The trends in the binding affinity and the surface saturation amount correspond well with the degree of change of protonation of the adsorbed molecules. The development of new research techniques makes it possible to attain a more profound understanding of the self-assembling behaviour of dendrimers. The comparison of QCM-D and MP-SPR allowed the estimation that the dendrimer film contains approximately 70% water. These results indicate that 6th generation PAMAM dendrimers form very hydrated films on silica surfaces. In this case the number of water molecules associated per dendrimer molecule varied from 10,450 to 9,200. The hydration of dendrimer films seems to be a crucial aspect of their implementation. This data confirmed that dendrimers are very promising candidates for many biological applications.
Collapse
Affiliation(s)
- Karolina Tokarczyk
- J. Haber Institute of Catalysis and Surface Chemistry, PAS, Niezapominajek 8, 30-239 Cracow, Poland
| | - Barbara Jachimska
- J. Haber Institute of Catalysis and Surface Chemistry, PAS, Niezapominajek 8, 30-239 Cracow, Poland.
| |
Collapse
|
7
|
Liu CY, Chen HL, Do C, Hong K. Spatial Distributions of Guest Molecule and Hydration Level in Dendrimer-Based Guest-Host Complex. ACS Macro Lett 2016; 5:1004-1008. [PMID: 35614650 DOI: 10.1021/acsmacrolett.6b00526] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Using the electrostatic complex of G4 poly(amidoamine) (PAMAM) dendrimer with an amphiphilic surfactant as a model system, contrast variation small angle neutron scattering (SANS) is implemented to resolve the key structural characteristics of dendrimer-based guest-host system. Quantifications of the radial distributions of the scattering length density and the hydration level within the complex molecule reveal that the surfactant is embedded in the peripheral region of dendrimer and the steric crowding in this region increases the backfolding of the dendritic segments, thereby reducing the hydration level throughout the complex molecule. The insights into the spatial location of the guest molecules as well as the perturbations of dendrimer conformation and hydration level deduced here are crucial for the delicate design of dendrimer-based guest-host system for biomedical applications.
Collapse
Affiliation(s)
- Chih-Ying Liu
- Department
of Chemical Engineering and Frontier Research Center on Fundamental
and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Hsin-Lung Chen
- Department
of Chemical Engineering and Frontier Research Center on Fundamental
and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, Taiwan
| | | | | |
Collapse
|
8
|
Ang J, Ma D, Lund R, Keten S, Xu T. Internal Structure of 15 nm 3-Helix Micelle Revealed by Small-Angle Neutron Scattering and Coarse-Grained MD Simulation. Biomacromolecules 2016; 17:3262-3267. [DOI: 10.1021/acs.biomac.6b00986] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Dan Ma
- Department
of Civil and Environmental Engineering and Department of Mechanical
Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Reidar Lund
- Department
of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315 Oslo, Norway
| | - Sinan Keten
- Department
of Civil and Environmental Engineering and Department of Mechanical
Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Ting Xu
- Material
Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| |
Collapse
|
9
|
Rühlig K, Mothes R, Aliabadi A, Kataev V, Büchner B, Buschbeck R, Rüffer T, Lang H. CuII bis(oxamato) end-grafted poly(amidoamine) dendrimers. Dalton Trans 2016; 45:7960-79. [DOI: 10.1039/c5dt03416g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
“Magneto-dendrimers” comprising up to ten endgrafted {Cu3(3,4-bopb)(pmdta)2}2− complex fragments have been synthesized to determine their magnetic properties.
Collapse
Affiliation(s)
- Karoline Rühlig
- Technische Universität Chemnitz
- Faculty of Natural Sciences
- Institute of Chemistry
- Inorganic Chemistry
- 09107 Chemnitz
| | - Robert Mothes
- Technische Universität Chemnitz
- Faculty of Natural Sciences
- Institute of Chemistry
- Inorganic Chemistry
- 09107 Chemnitz
| | - Azar Aliabadi
- Leibniz Institute for Solid State and Materials Research IFW Dresden
- 01069 Dresden
- Germany
| | - Vladislav Kataev
- Leibniz Institute for Solid State and Materials Research IFW Dresden
- 01069 Dresden
- Germany
| | - Bernd Büchner
- Leibniz Institute for Solid State and Materials Research IFW Dresden
- 01069 Dresden
- Germany
| | - Roy Buschbeck
- Technische Universität Chemnitz
- Faculty of Natural Sciences
- Institute of Chemistry
- Inorganic Chemistry
- 09107 Chemnitz
| | - Tobias Rüffer
- Technische Universität Chemnitz
- Faculty of Natural Sciences
- Institute of Chemistry
- Inorganic Chemistry
- 09107 Chemnitz
| | - Heinrich Lang
- Technische Universität Chemnitz
- Faculty of Natural Sciences
- Institute of Chemistry
- Inorganic Chemistry
- 09107 Chemnitz
| |
Collapse
|
10
|
Martinho N, Florindo H, Silva L, Brocchini S, Zloh M, Barata T. Molecular Modeling to Study Dendrimers for Biomedical Applications. Molecules 2014; 19:20424-20467. [PMID: 25493631 PMCID: PMC6270869 DOI: 10.3390/molecules191220424] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Revised: 11/12/2014] [Accepted: 11/17/2014] [Indexed: 02/06/2023] Open
Abstract
Molecular modeling techniques provide a powerful tool to study the properties of molecules and their interactions at the molecular level. The use of computational techniques to predict interaction patterns and molecular properties can inform the design of drug delivery systems and therapeutic agents. Dendrimers are hyperbranched macromolecular structures that comprise repetitive building blocks and have defined architecture and functionality. Their unique structural features can be exploited to design novel carriers for both therapeutic and diagnostic agents. Many studies have been performed to iteratively optimise the properties of dendrimers in solution as well as their interaction with drugs, nucleic acids, proteins and lipid membranes. Key features including dendrimer size and surface have been revealed that can be modified to increase their performance as drug carriers. Computational studies have supported experimental work by providing valuable insights about dendrimer structure and possible molecular interactions at the molecular level. The progress in computational simulation techniques and models provides a basis to improve our ability to better predict and understand the biological activities and interactions of dendrimers. This review will focus on the use of molecular modeling tools for the study and design of dendrimers, with particular emphasis on the efforts that have been made to improve the efficacy of this class of molecules in biomedical applications.
Collapse
Affiliation(s)
- Nuno Martinho
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Professor Gama Pinto, Lisbon 1649-003, Portugal
| | - Helena Florindo
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Professor Gama Pinto, Lisbon 1649-003, Portugal
| | - Liana Silva
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Professor Gama Pinto, Lisbon 1649-003, Portugal
| | - Steve Brocchini
- Department of Pharmaceutics, The School of Pharmacy, University of London, 29/39 Brunswick Square, London WC1N 1AX, UK
| | - Mire Zloh
- Department of Pharmacy, University of Hertfordshire, College Lane, Hatfield AL10 9AB, UK.
| | - Teresa Barata
- Department of Pharmaceutics, The School of Pharmacy, University of London, 29/39 Brunswick Square, London WC1N 1AX, UK.
| |
Collapse
|
11
|
Yanez Arteta M, Ainalem ML, Porcar L, Martel A, Coker H, Lundberg D, Chang DP, Soltwedel O, Barker R, Nylander T. Interactions of PAMAM Dendrimers with Negatively Charged Model Biomembranes. J Phys Chem B 2014; 118:12892-906. [DOI: 10.1021/jp506510s] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Marianna Yanez Arteta
- Physical
Chemistry, Center for Chemistry and Chemical Engineering, Lund University, SE-221 00 Lund, Sweden
| | | | - Lionel Porcar
- Institut Laue-Langevin, 71 avenue
des Martyrs, CS 20156, 38042 Grenoble Cedex 9, France
| | - Anne Martel
- Institut Laue-Langevin, 71 avenue
des Martyrs, CS 20156, 38042 Grenoble Cedex 9, France
| | - Helena Coker
- Institut Laue-Langevin, 71 avenue
des Martyrs, CS 20156, 38042 Grenoble Cedex 9, France
| | - Dan Lundberg
- Physical
Chemistry, Center for Chemistry and Chemical Engineering, Lund University, SE-221 00 Lund, Sweden
- CR
Competence AB, Center for Chemistry and Chemical Engineering, SE-221
00 Lund, Sweden
| | - Debby P. Chang
- Physical
Chemistry, Center for Chemistry and Chemical Engineering, Lund University, SE-221 00 Lund, Sweden
| | - Olaf Soltwedel
- Max-Planck-Institute
for Solid State Research, Outstation at MLZ, Lichtenbergstr.
1, 85747 Garching, Germany
| | - Robert Barker
- Institut Laue-Langevin, 71 avenue
des Martyrs, CS 20156, 38042 Grenoble Cedex 9, France
| | - Tommy Nylander
- Physical
Chemistry, Center for Chemistry and Chemical Engineering, Lund University, SE-221 00 Lund, Sweden
| |
Collapse
|
12
|
Yang CC, Huang YC, Chen CY, Su CJ, Chen HL, Ivanov VA. Structure of the Electrostatic Complex of DNA with Cationic Dendrimer of Intermediate Generation: The Role of Counterion Entropy. Macromolecules 2014. [DOI: 10.1021/ma500546h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Cheng-Che Yang
- Department
of Chemical Engineering and Frontier Research Center on Fundamental
and Applied Sciences of Matters, National Tsing Hua University, Hsin-Chu 30013, Taiwan
| | - Yen-Chih Huang
- National Synchrotron Radiation Research Center, Hsin-Chu, Taiwan
| | - Chun-Yu Chen
- National Synchrotron Radiation Research Center, Hsin-Chu, Taiwan
| | - Chun-Jen Su
- National Synchrotron Radiation Research Center, Hsin-Chu, Taiwan
| | - Hsin-Lung Chen
- Department
of Chemical Engineering and Frontier Research Center on Fundamental
and Applied Sciences of Matters, National Tsing Hua University, Hsin-Chu 30013, Taiwan
| | | |
Collapse
|
13
|
Yang L, da Rocha SRP. PEGylated, NH2-Terminated PAMAM Dendrimers: A Microscopic View from Atomistic Computer Simulations. Mol Pharm 2014; 11:1459-70. [DOI: 10.1021/mp400630z] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Lin Yang
- Department of Chemical Engineering
and Materials Science, College of Engineering, Wayne State University, 5050 Anthony Wayne Drive, 1133ENG, Detroit, Michigan 48202, United States
| | - Sandro R. P. da Rocha
- Department of Chemical Engineering
and Materials Science, College of Engineering, Wayne State University, 5050 Anthony Wayne Drive, 1133ENG, Detroit, Michigan 48202, United States
| |
Collapse
|
14
|
Molecular simulation study of PAMAM dendrimer composite membranes. J Mol Model 2014; 20:2119. [DOI: 10.1007/s00894-014-2119-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2013] [Accepted: 12/14/2013] [Indexed: 01/20/2023]
|
15
|
Tian WD, Ma YQ. Theoretical and computational studies of dendrimers as delivery vectors. Chem Soc Rev 2013; 42:705-27. [PMID: 23114420 DOI: 10.1039/c2cs35306g] [Citation(s) in RCA: 179] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
It is a great challenge for nanomedicine to develop novel dendrimers with maximum therapeutic potential and minimum side-effects for drug and gene delivery. As delivery vectors, dendrimers must overcome lots of barriers before delivering the bio-agents to the target in the cell. Extensive experimental investigations have been carried out to elucidate the physical and chemical properties of dendrimers and explore their behaviors when interacting with biomolecules, such as gene materials, proteins, and lipid membranes. As a supplement of the experimental techniques, it has been proved that computer simulations could facilitate the progress in understanding the delivery process of bioactive molecules. The structures of dendrimers in dilute solutions have been intensively investigated by monomer-resolved simulations, coarse-grained simulations, and atom-resolved simulations. Atomistic simulations have manifested that the hydrophobic interactions, hydrogen-bond interactions, and electrostatic attraction play critical roles in the formation of dendrimer-drug complexes. Multiscale simulations and statistical field theories have uncovered some physical mechanisms involved in the dendrimer-based gene delivery systems. This review will focus on the current status and perspective of theoretical and computational contributions in this field in recent years. (275 references).
Collapse
Affiliation(s)
- Wen-de Tian
- Center for Soft Condensed Matter Physics and Interdisciplinary Research, Soochow University, Suzhou 215006, China
| | | |
Collapse
|
16
|
Arteta MY, Eltes F, Campbell RA, Nylander T. Interactions of PAMAM dendrimers with SDS at the solid-liquid interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:5817-5831. [PMID: 23556998 DOI: 10.1021/la400774p] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
This work addresses structural and nonequilibrium effects of the interactions between well-defined cationic poly(amidoamine) PAMAM dendrimers of generations 4 and 8 and the anionic surfactant sodium dodecyl sulfate (SDS) at the hydrophilic silica-water interface. Neutron reflectometry and quartz crystal microbalance with dissipation monitoring were used to reveal the adsorption from premixed dendrimer/surfactant solutions as well as sequential addition of the surfactant to preadsorbed layers of dendrimers. PAMAM dendrimers of both generations adsorb to hydrophilic silica as a compact monolayer, and the adsorption is irreversible upon rinsing with salt solution. SDS adsorbs on the dendrimer layer and at low bulk concentrations causes the expansion of the dendrimer layers on the surface. When the bulk concentration of SDS is increased, the surfactant layer consists of aggregates or bilayer-like structures. The adsorption of surfactant is reversible upon rinsing, but slight changes of the structure of the preadsorbed PAMAM monolayer were observed. The adsorption from premixed solutions close to charge neutrality results in thick multilayers, but the surface excess is lower when the bulk complexes have a net negative charge. A critical examination of the pathway of adsorption for the interactions of SDS with preadsorbed PAMAM monolayers and premixed PAMAM/SDS solutions with hydrophilic silica revealed that nonequilibrium effects are important only in the latter case, and the application of a thermodynamic model to such experimental data would be inappropriate.
Collapse
|
17
|
Wu B, Liu Y, Li X, Mamontov E, Kolesnikov AI, Diallo SO, Do C, Porcar L, Hong K, Smith SC, Liu L, Smith GS, Egami T, Chen WR. Charge-Dependent Dynamics of a Polyelectrolyte Dendrimer and Its Correlation with Invasive Water. J Am Chem Soc 2013; 135:5111-7. [DOI: 10.1021/ja3125959] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bin Wu
- Department of Mechanical, Aerospace & Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Yun Liu
- The NIST Center for Neutron
Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-6100, United States
- Department of Chemical Engineering, University of Delaware, Newark, Delaware 19716, United
States
| | | | | | | | | | | | - Lionel Porcar
- Institut Laue-Langevin, B.P. 156, F-38042 Grenoble CEDEX 9, France
| | | | | | - Li Liu
- Department of Mechanical, Aerospace & Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | | | - Takeshi Egami
- Department of Materials Science
and Engineering and Department of Physics and Astronomy, The University of Tennessee, Knoxville, Tennessee 37996-1508,
United States
| | | |
Collapse
|
18
|
Lenz DA, Blaak R, Likos CN. Structural properties of dendrimer-colloid mixtures. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2012; 24:284119. [PMID: 22739439 DOI: 10.1088/0953-8984/24/28/284119] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We consider binary mixtures of colloidal particles and amphiphilic dendrimers of the second generation by means of Monte Carlo simulations. By using the effective interactions between monomer-resolved dendrimers and colloids, we compare the results of simulations of mixtures stemming from a full monomer-resolved description with the effective two-component description at different densities, composition ratios, colloid diameters and interaction strengths. Additionally, we map the two-component system onto an effective one-component model for the colloids in the presence of the dendrimers. Simulations based on the resulting depletion potentials allow us to extend the comparison to yet another level of coarse graining and to examine under which conditions this two-step approach is valid. In addition, a preliminary outlook into the phase behavior of this system is given.
Collapse
Affiliation(s)
- Dominic A Lenz
- Faculty of Physics, University of Vienna, Boltzmanngasse 5, A-1090 Vienna, Austria.
| | | | | |
Collapse
|
19
|
Lee H. Effects of salt on the size and internal structure of PAMAM dendrimers at different pH. MOLECULAR SIMULATION 2012. [DOI: 10.1080/08927022.2011.652629] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
|
20
|
Porus M, Clerc F, Maroni P, Borkovec M. Ion-Specific Responsiveness of Polyamidoamine (PAMAM) Dendrimers Adsorbed on Silica Substrates. Macromolecules 2012. [DOI: 10.1021/ma3004295] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Maria Porus
- Department of Inorganic, Analytical
Chemistry, University of Geneva, 30, Quai
Ernest-Ansermet, 1205
Geneva, Switzerland
| | - Florent Clerc
- Department of Inorganic, Analytical
Chemistry, University of Geneva, 30, Quai
Ernest-Ansermet, 1205
Geneva, Switzerland
| | - Plinio Maroni
- Department of Inorganic, Analytical
Chemistry, University of Geneva, 30, Quai
Ernest-Ansermet, 1205
Geneva, Switzerland
| | - Michal Borkovec
- Department of Inorganic, Analytical
Chemistry, University of Geneva, 30, Quai
Ernest-Ansermet, 1205
Geneva, Switzerland
| |
Collapse
|
21
|
Wu B, Kerkeni B, Egami T, Do C, Liu Y, Wang Y, Porcar L, Hong K, Smith SC, Liu EL, Smith GS, Chen WR. Structured water in polyelectrolyte dendrimers: Understanding small angle neutron scattering results through atomistic simulation. J Chem Phys 2012; 136:144901. [DOI: 10.1063/1.3697479] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
22
|
Huißmann S, Likos CN, Blaak R. Explicit vs Implicit Water Simulations of Charged Dendrimers. Macromolecules 2012. [DOI: 10.1021/ma202520d] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sebastian Huißmann
- Faculty of Physics, University of Vienna, Boltzmanngasse 5, A-1090 Vienna, Austria
| | - Christos N. Likos
- Faculty of Physics, University of Vienna, Boltzmanngasse 5, A-1090 Vienna, Austria
| | - Ronald Blaak
- Faculty of Physics, University of Vienna, Boltzmanngasse 5, A-1090 Vienna, Austria
| |
Collapse
|
23
|
|
24
|
Hong K, Liu Y, Porcar L, Liu D, Gao CY, Smith GS, Herwig KW, Cai S, Li X, Wu B, Chen WR, Liu L. Structural response of polyelectrolyte dendrimer towards molecular protonation: the inconsistency revealed by SANS and NMR. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2012; 24:064116. [PMID: 22277898 DOI: 10.1088/0953-8984/24/6/064116] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Polyamidoamine (PAMAM) dendrimers and their charged state in deuterium oxide have been investigated with proton pulsed field gradient diffusion nuclear magnetic resonance (PFG-NMR) and small-angle neutron scattering (SANS) techniques. NMR measurements suggest that significant variation of the hydrodynamic radius, calculated by the Stokes-Einstein relation with appropriate surface conditions, is observed upon increasing the molecular protonation. However, a comparative SANS experiment indicates little dependence of the dendrimer global size, in terms of its radius of gyration, on molecular protonation. The inconsistency indicates the necessity of incorporating the effect of molecular interface modification and molecular porosity provided by dressed counterions, when dynamical measurements are used for the determination of the structural characteristics of ionic soft colloids even in dilute suspensions.
Collapse
Affiliation(s)
- Kunlun Hong
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
25
|
Wang YL, Lu ZY, Laaksonen A. Specific binding structures of dendrimers on lipid bilayer membranes. Phys Chem Chem Phys 2012; 14:8348-59. [DOI: 10.1039/c2cp40700k] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
|
26
|
Wu B, Li X, Do C, Kim TH, Shew CY, Liu Y, Yang J, Hong K, Porcar L, Chen CY, Liu EL, Smith GS, Herwig KW, Chen WR. Spatial distribution of intra-molecular water and polymeric components in polyelectrolyte dendrimers revealed by small angle scattering investigations. J Chem Phys 2011; 135:144903. [DOI: 10.1063/1.3651364] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
|
27
|
Scaling trend in diffusion coefficients of low generation G0–G3 PAMAM dendrimers in aqueous solution at high and neutral pH. Struct Chem 2011. [DOI: 10.1007/s11224-011-9844-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
28
|
Mureşan L, Maroni P, Popa I, Porus M, Longtin R, Papastavrou G, Borkovec M. Conformational Changes of Polyamidoamine (PAMAM) Dendrimers Adsorbed on Silica Substrates. Macromolecules 2011. [DOI: 10.1021/ma201103n] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Laura Mureşan
- Department of Inorganic, Analytical and Applied Chemistry, University of Geneva, 30, Quai Ernest-Ansermet, 1211 Geneva, Switzerland
| | - Plinio Maroni
- Department of Inorganic, Analytical and Applied Chemistry, University of Geneva, 30, Quai Ernest-Ansermet, 1211 Geneva, Switzerland
| | - Ionel Popa
- Department of Inorganic, Analytical and Applied Chemistry, University of Geneva, 30, Quai Ernest-Ansermet, 1211 Geneva, Switzerland
| | - Maria Porus
- Department of Inorganic, Analytical and Applied Chemistry, University of Geneva, 30, Quai Ernest-Ansermet, 1211 Geneva, Switzerland
| | - Rémi Longtin
- Swiss Federal Laboratories for Materials Science and Technology (EMPA), 8600 Dübendorf, Switzerland
| | - Georg Papastavrou
- Physical Chemistry II, University of Bayreuth, 95440 Bayreuth, Germany
| | - Michal Borkovec
- Department of Inorganic, Analytical and Applied Chemistry, University of Geneva, 30, Quai Ernest-Ansermet, 1211 Geneva, Switzerland
| |
Collapse
|
29
|
Lee H, Larson RG. Effects of PEGylation on the Size and Internal Structure of Dendrimers: Self-Penetration of Long PEG Chains into the Dendrimer Core. Macromolecules 2011. [DOI: 10.1021/ma102482u] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Hwankyu Lee
- Department of Chemical Engineering, Dankook University, Yongin 448-701, South Korea
| | - Ronald G. Larson
- Department of Chemical Engineering, Biomedical Engineering, Mechanical Engineering, and Macromolecular Science and Engineering Program, University of Michigan, Ann Arbor, Michigan 48109, United States
| |
Collapse
|
30
|
Roncaglia DI, Carballido-Landeira J, Muñuzuri AP. Pattern formation in the Belousov–Zhabotinsky-PAMAM dendrimer system. Phys Chem Chem Phys 2011; 13:7426-32. [DOI: 10.1039/c0cp02656e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
31
|
Myers VS, Weir MG, Carino EV, Yancey DF, Pande S, Crooks RM. Dendrimer-encapsulated nanoparticles: New synthetic and characterization methods and catalytic applications. Chem Sci 2011. [DOI: 10.1039/c1sc00256b] [Citation(s) in RCA: 283] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
|
32
|
Li X, Hong K, Liu Y, Shew CY, Liu E, Herwig KW, Smith GS, Zhao J, Zhang G, Pispas S, Chen WR. Water distributions in polystyrene-block-poly[styrene-g-poly(ethylene oxide)] block grafted copolymer system in aqueous solutions revealed by contrast variation small angle neutron scattering study. J Chem Phys 2010; 133:144912. [DOI: 10.1063/1.3493331] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
33
|
Huissmann S, Wynveen A, Likos CN, Blaak R. The effects of pH, salt and bond stiffness on charged dendrimers. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2010; 22:232101. [PMID: 21393758 DOI: 10.1088/0953-8984/22/23/232101] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We have performed molecular dynamics simulations of charged dendrimers with various charge distributions, and including both rigid and soft bonds between the monomers. Whereas the rigid bonds result in a shell-like structure, the soft bonds lead to a larger dendrimer size and a more homogeneous monomer distribution. The measured density profiles of counter-ions and co-ions are compared with those stemming from Poisson-Boltzmann theory. The latter is in very good agreement with simulations for the soft-bond model, whereas for rigid bonds, significant discrepancies arise caused by the fact that Poisson-Boltzmann theory neglects finite-size ion effects. The addition of monovalent salt has no significant influence on the behavior of the dendrimers.
Collapse
Affiliation(s)
- Sebastian Huissmann
- Institute of Theoretical Physics, Heinrich Heine University of Düssedorf, Universitätsstrasse 1, D-40225 Düsseldorf, Germany.
| | | | | | | |
Collapse
|
34
|
Huißmann S, Likos CN, Blaak R. Conformations of high-generation dendritic polyelectrolytes. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/c0jm01584a] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
35
|
Gomez MV, Guerra J, Myers VS, Crooks RM, Velders AH. Nanoparticle Size Determination by 1H NMR Spectroscopy. J Am Chem Soc 2009; 131:14634-5. [DOI: 10.1021/ja9065442] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- M. Victoria Gomez
- Instituto Regional de Investigación Científica Aplicada (IRICA) and Departamento de Química Orgánica, Facultad de Química, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain, CIBERNED, Unidad Asociada Neurodeath, CSIC-Universidad de Castilla-La Mancha, Facultad de Medicina, 02006 Albacete, Spain, Department of Chemistry and Biochemistry, Center for Nano and Molecular Science and Technology, and the Texas Materials Institute, The University of Texas at Austin, Austin, Texas 78712-0165, and NMR &
| | - Javier Guerra
- Instituto Regional de Investigación Científica Aplicada (IRICA) and Departamento de Química Orgánica, Facultad de Química, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain, CIBERNED, Unidad Asociada Neurodeath, CSIC-Universidad de Castilla-La Mancha, Facultad de Medicina, 02006 Albacete, Spain, Department of Chemistry and Biochemistry, Center for Nano and Molecular Science and Technology, and the Texas Materials Institute, The University of Texas at Austin, Austin, Texas 78712-0165, and NMR &
| | - V. Sue Myers
- Instituto Regional de Investigación Científica Aplicada (IRICA) and Departamento de Química Orgánica, Facultad de Química, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain, CIBERNED, Unidad Asociada Neurodeath, CSIC-Universidad de Castilla-La Mancha, Facultad de Medicina, 02006 Albacete, Spain, Department of Chemistry and Biochemistry, Center for Nano and Molecular Science and Technology, and the Texas Materials Institute, The University of Texas at Austin, Austin, Texas 78712-0165, and NMR &
| | - Richard M. Crooks
- Instituto Regional de Investigación Científica Aplicada (IRICA) and Departamento de Química Orgánica, Facultad de Química, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain, CIBERNED, Unidad Asociada Neurodeath, CSIC-Universidad de Castilla-La Mancha, Facultad de Medicina, 02006 Albacete, Spain, Department of Chemistry and Biochemistry, Center for Nano and Molecular Science and Technology, and the Texas Materials Institute, The University of Texas at Austin, Austin, Texas 78712-0165, and NMR &
| | - Aldrik H. Velders
- Instituto Regional de Investigación Científica Aplicada (IRICA) and Departamento de Química Orgánica, Facultad de Química, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain, CIBERNED, Unidad Asociada Neurodeath, CSIC-Universidad de Castilla-La Mancha, Facultad de Medicina, 02006 Albacete, Spain, Department of Chemistry and Biochemistry, Center for Nano and Molecular Science and Technology, and the Texas Materials Institute, The University of Texas at Austin, Austin, Texas 78712-0165, and NMR &
| |
Collapse
|
36
|
Tian WD, Ma YQ. Molecular Dynamics Simulations of a Charged Dendrimer in Multivalent Salt Solution. J Phys Chem B 2009; 113:13161-70. [DOI: 10.1021/jp906449g] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wen-de Tian
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University,Nanjing 210093, China
| | - Yu-qiang Ma
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University,Nanjing 210093, China
| |
Collapse
|
37
|
Tanis I, Karatasos K. Molecular dynamics simulations of polyamidoamine dendrimers and their complexes with linear poly(ethylene oxide) at different pH conditions: static properties and hydrogen bonding. Phys Chem Chem Phys 2009; 11:10017-28. [DOI: 10.1039/b913986a] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|