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PDADMAC/PSS Oligoelectrolyte Multilayers: Internal Structure and Hydration Properties at Early Growth Stages from Atomistic Simulations. Molecules 2020; 25:molecules25081848. [PMID: 32316422 PMCID: PMC7222011 DOI: 10.3390/molecules25081848] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 04/06/2020] [Accepted: 04/14/2020] [Indexed: 11/17/2022] Open
Abstract
We analyze the internal structure and hydration properties of poly(diallyl dimethyl ammonium chloride)/poly(styrene sulfonate sodium salt) oligoelectrolyte multilayers at early stages of their layer-by-layer growth process. Our study is based on large-scale molecular dynamics simulations with atomistic resolution that we presented recently [Sánchez et al., Soft Matter2019, 15, 9437], in which we produced the first four deposition cycles of a multilayer obtained by alternate exposure of a flat silica substrate to aqueous electrolyte solutions of such polymers at 0.1M of NaCl. In contrast to any previous work, here we perform a local structural analysis that allows us to determine the dependence of the multilayer properties on the distance to the substrate. We prove that the large accumulation of water and ions next to the substrate observed in previous overall measurements actually decreases the degree of intrinsic charge compensation, but this remains as the main mechanism within the interface region. We show that the range of influence of the substrate reaches approximately 3 nm, whereas the structure of the outer region is rather independent from the position. This detailed characterization is essential for the development of accurate mesoscale models able to reach length and time scales of technological interest.
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Sánchez PA, Vögele M, Smiatek J, Qiao B, Sega M, Holm C. Atomistic simulation of PDADMAC/PSS oligoelectrolyte multilayers: overall comparison of tri- and tetra-layer systems. SOFT MATTER 2019; 15:9437-9451. [PMID: 31720676 DOI: 10.1039/c9sm02010a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
By employing large-scale molecular dynamics simulations of atomistically resolved oligoelectrolytes in aqueous solutions, we study in detail the first four layer-by-layer deposition cycles of an oligoelectrolyte multilayer made of poly(diallyl dimethyl ammonium chloride)/poly(styrene sulfonate sodium salt) (PDADMAC/PSS). The multilayers are grown on a silica substrate in 0.1 M NaCl electrolyte solutions and the swollen structures are then subsequently exposed to varying added salt concentration. We investigated the microscopic properties of the films, analyzing in detail the differences between three- and four-layer systems. Our simulations provide insights into the early stages of growth of a multilayer, which are particularly challenging for experimental observations. We found rather strong complexation of the oligoelectrolytes, with fuzzy layering of the film structure. The main charge compensation mechanism is for all cases intrinsic, whereas extrinsic compensation is relatively enhanced for the layer of the last deposition cycle. In addition, we quantified other fundamental observables of these systems, such as the film thickness, water uptake, and overcharge fractions for each deposition layer.
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Affiliation(s)
- Pedro A Sánchez
- Ural Federal University, 51 Lenin av., Ekaterinburg, 620000, Russian Federation. and Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf e.V., Dresden, Germany
| | - Martin Vögele
- Department of Computer Science, Stanford University, Stanford, California, USA
| | - Jens Smiatek
- Institut für Computerphysik, Universität Stuttgart, 70569 Stuttgart, Germany
| | - Baofu Qiao
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois, USA
| | - Marcello Sega
- Forschungszentrum Jülich, Helmholtz Institute Erlangen-Nuremberg, Nuremberg, Germany
| | - Christian Holm
- Institut für Computerphysik, Universität Stuttgart, 70569 Stuttgart, Germany
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Han P, Yang Z, Cao H, He W, Wang D, Zhang J, Xing Y, Gao H. Nonlinear optical properties of the novel kind of organic donor-acceptor thiophene derivatives with click chemistry modification. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.09.020] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Mi Y, Liang P, Yang Z, Wang D, Cao H, He W, Yang H, Yu L. Application of Near-IR Absorption Porphyrin Dyes Derived from Click Chemistry as Third-Order Nonlinear Optical Materials. ChemistryOpen 2016; 5:71-7. [PMID: 27308215 PMCID: PMC4906481 DOI: 10.1002/open.201500124] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Revised: 09/11/2015] [Indexed: 11/30/2022] Open
Abstract
Recently, third‐order nonlinear properties of porphyrins and porphyrin polymers and coordination compounds have been extensively studied in relation to their use in photomedicine and molecular photonics. A new functionalized porphyrin dye containing electron‐rich alkynes was synthesized and further modified by formal [2+2] click reactions with click reagents tetracyanoethylene (TCNE) and 7, 7, 8, 8‐tetracyanoquinodimethane (TCNQ). The photophysical properties of these porphyrin dyes, as well as the click reaction, were studied by UV/Vis spectroscopy. In particular, third‐order nonlinear optical properties of the dyes, which showed typical d‐π‐A structures, were characterized by Z‐scan techniques. In addition, the self‐assembly properties were investigated through the phase‐exchange method, and highly organized morphologies were observed by scanning electron microscopy (SEM). The effects of the click post‐functionalization on the properties of the porphyrins were studied, and these functionalized porphyrin dyes represent an interesting set of candidates for optoelectronic device components.
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Affiliation(s)
- Yongsheng Mi
- Department of Materials Science and Engineering University of Science and Technology Beijing 30 Xueyuan Rd, Haidian Beijing 100083 P. R. China
| | - Pengxia Liang
- Department of Materials Science and Engineering University of Science and Technology Beijing 30 Xueyuan Rd, Haidian Beijing 100083 P. R. China
| | - Zhou Yang
- Department of Materials Science and Engineering University of Science and Technology Beijing 30 Xueyuan Rd, Haidian Beijing 100083 P. R. China
| | - Dong Wang
- Department of Materials Science and Engineering University of Science and Technology Beijing 30 Xueyuan Rd, Haidian Beijing 100083 P. R. China
| | - Hui Cao
- Department of Materials Science and Engineering University of Science and Technology Beijing 30 Xueyuan Rd, Haidian Beijing 100083 P. R. China
| | - Wanli He
- Department of Materials Science and Engineering University of Science and Technology Beijing 30 Xueyuan Rd, Haidian Beijing 100083 P. R. China
| | - Huai Yang
- Department of Materials Science and Engineering Peking University 5 Yiheyuan Rd, Haidian Beijing 100871 P. R. China
| | - Lian Yu
- State Key Laboratory of Coal Resource and Safe Mining China University of Mining & Technology 11 Xueyuan Rd Beijing P. R. China
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Mi Y, Liang P, Jin Z, Wang D, Yang Z. Synthesis and third-order nonlinear optical properties of triphenylene derivatives modified by click chemistry. Chemphyschem 2013; 14:4102-8. [PMID: 24323854 DOI: 10.1002/cphc.201300615] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Revised: 10/11/2013] [Indexed: 11/10/2022]
Abstract
A series of asymmetric triphenylene derivatives containing typical D-π-A structures is successfully synthesized by means of [2+2] cycloaddition-cycloreversion click reactions. The photophysical and electrochemical properties, as well as the click reactions, are characterized by means of UV/Vis absorption spectroscopy, cyclic voltammetry, and DFT modulations. In addition, the third-order nonlinear properties, including the nonlinear absorption and the nonlinear susceptibilities, are investigated by using Z-scan techniques. A typical reverse saturable absorption-saturable absorption behavior is observed for the third-order nonlinear absorption, with the third-order nonlinear susceptibilities of the compounds being 1.05×10(-12) , -1.50×10(-12) , and -0.52×10(-12) esu, respectively.
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Affiliation(s)
- Yongsheng Mi
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083 (China)
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Affiliation(s)
- Smriti Singh
- DWI an der RWTH Aachen e.V. Functional and Interactive Polymers and Institute for Technical and Macromolecular Chemistry, RWTH Aachen University; 52056 Aachen Germany
| | - Martin Möller
- DWI an der RWTH Aachen e.V. Functional and Interactive Polymers and Institute for Technical and Macromolecular Chemistry, RWTH Aachen University; 52056 Aachen Germany
| | - Andrij Pich
- DWI an der RWTH Aachen e.V. Functional and Interactive Polymers and Institute for Technical and Macromolecular Chemistry, RWTH Aachen University; 52056 Aachen Germany
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Chen S, Li Y, Li Y. Architecture of low dimensional nanostructures based on conjugated polymers. Polym Chem 2013. [DOI: 10.1039/c3py00098b] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Lo PK, Sleiman HF. Synthesis and Molecular Recognition of Conjugated Polymer with DNA-Mimetic Properties. Macromolecules 2008. [DOI: 10.1021/ma800345t] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pik Kwan Lo
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec, Canada H3A 2K6
| | - Hanadi F. Sleiman
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec, Canada H3A 2K6
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Wang L, Wang X, Xu M, Chen D, Sun J. Layer-by-layer assembled microgel films with high loading capacity: reversible loading and release of dyes and nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:1902-1909. [PMID: 18205423 DOI: 10.1021/la7031048] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Multilayer films containing microgels of chemically cross-linked poly(allylamine hydrochloride) (PAH) and dextran (named PAH-D) were fabricated by layer-by-layer deposition of PAH-D and poly(styrene sulfonate) (PSS). The successful fabrication of PAH-D/PSS multilayer films was verified by quartz crystal microbalance measurements and cross-sectional scanning electron microscopy. The as-prepared PAH-D/PSS multilayer films can reversibly load and release negatively charged dyes such as methyl orange (MO) and fluorescein sodium and mercaptoacetic acid-stabilized CdTe nanoparticles. The loading capacity of the film for MO can be as large as approximately 3.0 microg/cm2 per bilayer, which corresponds to a MO density of 0.75 g/cm3 in the film. The high loading capacity of the PAH-D/PSS films originates from the cross-linked film structure with sufficient binding groups of protonated amine groups, as well as their high swelling capability by solvent. The loaded material can be released slowly when immersing the films in 0.9% normal saline. Meanwhile, the PAH-D/PSS multilayer films could deposit directly on either hydrophilic or hydrophobic substrates such as quartz, polytetrafluoroethylene, polystyrene, poly(ethylene terephthalate), and polypropylene. The microgel films of PAH-D/PSS are expected to be widely useful as matrixes for loading functional guest materials and even for controlled release.
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Affiliation(s)
- Lin Wang
- College of Chemistry, Jilin University, Changchun, People's Republic of China
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Lu Y, Chen X, Hu W, Lu N, Sun J, Shen J. Room-temperature imprinting poly(acrylic acid)/poly(allylamine hydrochloride) multilayer films by using polymer molds. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:3254-9. [PMID: 17269813 DOI: 10.1021/la0632676] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Layer-by-layer assembled polyelectrolyte multilayer films of poly(acrylic acid) (PAA)/poly(allylamine hydrochloride) (PAH) have been successfully patterned by room-temperature imprinting using a Norland Optical Adhesives (NOA 63) polymer mold. The proper amount of water in the PAA/PAH multilayer film can decrease the viscosity of the film and facilitate the imprinting. Many factors, such as imprinting pressure, length of imprinting time, and the structure and size of the patterns in the polymer mold, can produce an influence on the final imprinted pattern structures on multilayer films. A high imprinting pressure of 100 bar and elongated imprinting time of several hours is needed to achieve a patterned PAA/PAH multilayer film with a feature size of several tens of micrometers. With a twice imprinting, grid structures can be successfully produced when a NOA 63 mold having line structures is used. Room-temperature imprinting by using polymer NOA 63 mold provides a facile way to fabricate layered polymeric films with various kinds of pattern structures.
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Affiliation(s)
- Yingxi Lu
- Key Lab of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, People's Republic of China
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Gong HM, Wang XH, Du YM, Wang QQ. Optical nonlinear absorption and refraction of CdS and CdS-Ag core-shell quantum dots. J Chem Phys 2006; 125:24707. [PMID: 16848604 DOI: 10.1063/1.2212400] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The CdS and CdS-Ag core-shell quantum dots (QDs) have been prepared. The nanostructures of the QDs were revealed by transmisson electron microscopy and absorption spectra, respectively. The third-order nonlinear optical properties of the core-shell QDs have been studied by using Z-scan technique with femtosecond pulses at the wavelength of 790 nm. The value of the effective nonlinear absorption coefficient beta(eff) of CdS-Ag QDs is measured to be about 16.8 cm/GW, which is about 400 times larger than that of bare CdS QDs of 3.9 x 10(-2) cm/GW. The nonlinear refraction index gamma of CdS-Ag QDs is about -2.3 x 10(-4) cm(2)GW, which is about 200 times larger than that of bare CdS QDs of 1.0 x 10(-6) cm(2)GW.
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Affiliation(s)
- Hong-Mei Gong
- Department of Physics, Wuhan University, Wuhan 430072, China
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Wang X, Du Y, Ding S, Wang Q, Xiong G, Xie M, Shen X, Pang D. Preparation and Third-Order Optical Nonlinearity of Self-Assembled Chitosan/CdSe−ZnS Core−Shell Quantum Dots Multilayer Films. J Phys Chem B 2006; 110:1566-70. [PMID: 16471716 DOI: 10.1021/jp055916c] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The self-assembled chitosan CdSe quantum dots (QDs) and chitosan CdSe-ZnS core-shell QDs films have been prepared by using layer-by-layer electrostatic technique. The well-ordered nanostructure and the layer-by-layer deposition of the QDs are revealed by AFM and exciton absorption spectra, respectively. The optical nonlinearity of the composite films were studied by using Z-scan technique with femtosecond pulses at the wavelength of 790 nm, the value of third-order susceptibility of core-shell QDs are measured to be about 1.1 x 10(-8) esu, which is about 200% larger than that of CdSe QDs of 5.3 x 10(-9) esu. This has potential applications in all-optical switches in optical information processing.
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Affiliation(s)
- Xiaohui Wang
- School of Resource and Environmental Science, Department of Physics and Center for Nanoscience & Nanotechnology Research, and College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
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