Use of multidetector light-scattering experiments to study the flexibility of individual polymer chains in solution

1987 ◽  
Vol 20 (9) ◽  
pp. 2187-2194 ◽  
Author(s):  
William G. Griffin ◽  
Mary C. A. Griffin ◽  
Francois Boue
Keyword(s):  
Light Scattering ◽  
Polymer Chains ◽  
Individual Polymer

SuFExable Polymers with Helical Structures Derived from Thionyl Tetrafluoride (SOF4)

2019 ◽  
Author(s):  
Suhua Li ◽  
Gencheng Li ◽  
Bing Gao ◽  
Sidharam P. Pujari ◽  
Xiaoyan Chen ◽  
...  
Keyword(s):  
Functional Polymers ◽  
Polymer Chains ◽  
New Materials ◽  
Helical Structures ◽  
Polymer Backbone ◽  
Silyl Ethers ◽  
Helical Polymer ◽  
Key Characteristics ◽  
Post Modification ◽  
Individual Polymer

The first SuFEx click chemistry synthesis of SOF<sub>4</sub>-derived copolymers based upon the polymerization of bis(iminosulfur oxydifluorides) and bis(aryl silyl ethers) is described. This novel class of SuFEx polymer presents two key characteristics: First, the newly created [-N=S(=O)F-O-] polymer backbone linkages are themselves SuFExable and primed to undergo further high-yielding and precise SuFEx-based post-modification with phenols or amines to yield branched functional polymers. Second, studies of individual polymer chains of several of these new materials indicate the presence of helical polymer structures, which itself suggests a preferential approach of new monomers onto the growing polymer chain upon the formation of the stereogenic linking moiety.

scholarly journals Advances in the Multi-Orthogonal Folding of Single Polymer Chains into Single-Chain Nanoparticles

Polymers ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 293
Author(s):  
Agustín Blazquez-Martín ◽  
Ester Verde-Sesto ◽  
Angel J. Moreno ◽  
Arantxa Arbe ◽  
Juan Colmenero ◽  
...  
Keyword(s):  
Computer Simulations ◽  
Chemical Species ◽  
Synthetic Polymers ◽  
Review Article ◽  
Polymer Chains ◽  
Single Chain ◽  
High Dilution ◽  
Covalent Bonds ◽  
Covalent Interactions ◽  
Individual Polymer

The folding of certain proteins (e.g., enzymes) into perfectly defined 3D conformations via multi-orthogonal interactions is critical to their function. Concerning synthetic polymers chains, the “folding” of individual polymer chains at high dilution via intra-chain interactions leads to so-called single-chain nanoparticles (SCNPs). This review article describes the advances carried out in recent years in the folding of single polymer chains into discrete SCNPs via multi-orthogonal interactions using different reactive chemical species where intra-chain bonding only occurs between groups of the same species. First, we summarize results from computer simulations of multi-orthogonally folded SCNPs. Next, we comprehensively review multi-orthogonally folded SCNPs synthesized via either non-covalent bonds or covalent interactions. Finally, we conclude by summarizing recent research about multi-orthogonally folded SCNPs prepared through both reversible (dynamic) and permanent bonds.

scholarly journals Oxidative regulation of the mechanical strength of a C–S bond

2020 ◽  
Vol 11 (38) ◽  
pp. 10444-10448
Author(s):  
Yangju Lin ◽  
Stephen L. Craig
Keyword(s):  
Fracture Toughness ◽  
Mechanical Strength ◽  
Performance Metrics ◽  
Polymer Chains ◽  
Bulk Materials ◽  
Oxidative Regulation ◽  
Individual Polymer

The mechanical strength of individual polymer chains is believed to underlie a number of performance metrics in bulk materials, including adhesion and fracture toughness.

Covalent Connection of Two Individual Polymer Chains on a Surface: An Elementary Step towards Molecular Nanoconstructions

2003 ◽  
Vol 42 (17) ◽  
pp. 1932-1935 ◽  
Author(s):  
Jörg Barner ◽  
Frank Mallwitz ◽  
Lijin Shu ◽  
A. Dieter Schlüter ◽  
Jürgen P. Rabe
Keyword(s):  
Elementary Step ◽  
Polymer Chains ◽  
Individual Polymer

Dynamics of Polystyrene in Confining Geometry: Transition from Dilute to Semidilute

1992 ◽  
Vol 290 ◽  
Author(s):  
Iwao Teraoka ◽  
Kenneth H. Langley ◽  
Frank E. Karasz
Keyword(s):  
Diffusion Coefficient ◽  
Light Scattering ◽  
Apparent Diffusion Coefficient ◽  
Chemical Potential ◽  
Polymer Concentration ◽  
Polymer Chains ◽  
Molecular Weights ◽  
Highly Nonlinear ◽  
Wide Range ◽  
Apparent Diffusion

AbstractDynamics of polystyrene molecules inside controlled pore glasses, a typical confining geometry, was studied by dynamic light scattering over a wide range of concentrations of polystyrene in solutions in equilibrium with the porous glasses. Index-matching of the solvent to the silica glasses effectively facilitates the acquisition of information on the dynamics of polymer chains inside the pore without compromising that information by multiple light scattering. When the concentration outside the pore is much smaller than the overlap concentration v*, the apparent diffusion coefficient Dporc of polymers within the pore shows little dependence on concentration. As the outside concentration increases and approaches v*, Dporc rapidly increases. This tendency is more pronounced for polystyrene samples that have higher molecular weights and are predicted to have a lower concentration inside the pore. With further increases of concentration beyond v*, Dporc approaches the apparent diffusion coefficient outside the pore. Moreover, Dporc becomes almost the same for the three different molecular weights of polystyrene fractions studied and depends primarily on the weight concentration of the solute outside the pore. These features are typical of a semidilute solution regime for flexible polymers. The rapid increase in Dporc, is ascribed to a drastic increase of the polymer concentration inside the pore, which results from an equilibration of the chemical potential of the polymer molecule between the interior of the pore and the exterior. Thus, a rapid increase in the osmotic pressure outside the pore drives the polymers into pore channels even at the expense of reduced entropy. We present a quantitative analysis of this highly nonlinear partitioning of polymer molecules.

scholarly journals Advances in Single-Chain Nanoparticles for Catalysis Applications

2017 ◽  
Author(s):  
Jon Rubio-Cervilla ◽  
Edurne González ◽  
José A. Pomposo
Keyword(s):  
Chemical Compounds ◽  
Inorganic Nanoparticles ◽  
Polymer Chains ◽  
Carbon Nanodots ◽  
Aqueous Environment ◽  
High Catalytic Activity ◽  
Artificial Enzyme ◽  
Single Chain ◽  
Capture And Release ◽  
Individual Polymer

Enzymes are the most efficient catalysts known working in an aqueous environment near room temperature. The folding of individual polymer chains to functional single-chain nanoparticles (SCNPs) offers many opportunities for the development of artificial enzyme-mimic catalysts showing both high catalytic activity and specificity. In this review, we highlight recent results obtained in the use of SCNPs as bioinspired, highly-efficient nanoreactors (3&ndash;30 nm) for the synthesis of a variety of nanomaterials (inorganic nanoparticles, quantum dots, carbon nanodots), polymers and chemical compounds, as well as nanocontainers for CO2 capture and release.

SuFExable Polymers with Helical Structures Derived from Thionyl Tetrafluoride (SOF4)

2019 ◽  
Author(s):  
Suhua Li ◽  
Gencheng Li ◽  
Bing Gao ◽  
Sidharam P. Pujari ◽  
Xiaoyan Chen ◽  
...  
Keyword(s):  
Functional Polymers ◽  
Polymer Chains ◽  
New Materials ◽  
Helical Structures ◽  
Polymer Backbone ◽  
Silyl Ethers ◽  
Helical Polymer ◽  
Key Characteristics ◽  
Post Modification ◽  
Individual Polymer

The first SuFEx click chemistry synthesis of SOF<sub>4</sub>-derived copolymers based upon the polymerization of bis(iminosulfur oxydifluorides) and bis(aryl silyl ethers) is described. This novel class of SuFEx polymer presents two key characteristics: First, the newly created [-N=S(=O)F-O-] polymer backbone linkages are themselves SuFExable and primed to undergo further high-yielding and precise SuFEx-based post-modification with phenols or amines to yield branched functional polymers. Second, studies of individual polymer chains of several of these new materials indicate the presence of helical polymer structures, which itself suggests a preferential approach of new monomers onto the growing polymer chain upon the formation of the stereogenic linking moiety.

Light Scattering Study of [60] Fullerenol-Based Poly(Urethane-Ether) Star-Shaped Polymers

1994 ◽  
Vol 359 ◽  
Author(s):  
Lee Y. Wang ◽  
Long Y. Chiang
Keyword(s):  
Light Scattering ◽  
Diffusion Coefficients ◽  
Gaussian Model ◽  
Polymer Chains ◽  
Star Polymer ◽  
Dilute Solution ◽  
Analog Model ◽  
Scattering Measurements ◽  
Star Shaped Polymer ◽  
Scattering Study

ABSTRACTThe dynamic behavior of the fullerenol-based polyurethane star-shaped polymer and its analog model stars, containing three or four polymer arms, was investigated in toluene solution by dynamic light scattering measurements. In these systems, the diffusion coefficients clearly showed no angular dependence. In the case of study in dilute solution, all three star polyurethanes were found to possess higher mobility than that of the corresponding linear polyurethane with a similar molecular weight. Furthermore, the conformation of anchoring polymer chains was characterized by the hydrodynamic shrinking factor and compared with the Gaussian model. Results suggested that the polymer arms in the fullerenebased star-polymer were uniformly distributed around the central C60 cage.

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