Tag: M.W=200-250

Durie, Karson; Yatvin, Jeremy; Kovaliov, Marina; Crane, Grant H.; Horn, Jessica; Averick, Saadyah; Locklin, Jason published the artcile< SuFEx Postpolymerization Modification Kinetics and Reactivity in Polymer Brushes>, Safety of Perfluorophenyl acrylate, the main research area is SuFEx postpolymn kinetic reactivity polymer brushe.

Since its introduction in 2014, the sulfur(VI) fluoride exchange (SuFEx) reaction has emerged as a promising new reaction in the field of polymer chem., in both polymerization of diverse polymer backbones and postpolymn. modification (PPM). Previously, we successfully reported the use of SuFEx chem. as a method for surface derivatization through the PPM of sulfonyl fluoride containing polymer brushes. However, with the diversity of conditions, substrate scope, and catalyst selection afforded by this reaction, it is advantageous to expand the use of SuFEx for PPM on polymer brushes to discern the advantages and limitations of this reaction in surface conjugation. In this work, we used three different polymer brush systems-alkyl sulfonyl fluorides, aromatic sulfonyl fluorides, and aromatic fluorosulfonates-and each was reacted with three different silyl ether derivatives (aryl, alkyl, and benzyl). Each of these reactions was subjected to different catalysts, and herein, we present rates, conditions, and side products for PPM of polymer brushes using SuFEx chem. In addition, we explored the use of TBDMS brushes and their reaction with fluorosulfonate derivatives, where surprisingly no surface reaction occurs. With these studies, we are able to better understand the rates and limitations of this click reaction in the context of surface derivatization.

Macromolecules (Washington, DC, United States) published new progress about Click chemistry. 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, Safety of Perfluorophenyl acrylate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Bihani, Manisha; Bora, Pranjal P.; Nachtegaal, Maarten; Jasinski, Jacek B.; Plummer, Scott; Gallou, Fabrice; Handa, Sachin published the artcile< Microballs Containing Ni(0)Pd(0) Nanoparticles for Highly Selective Micellar Catalysis in Water>, COA of Formula: C11H15NO3, the main research area is nickel palladium nanoparticle selective micellar catalysis water.

Both Ni(0) complexes and nanoparticles (NPs) are unstable in water, which poses a significant hindrance to their application in aqueous synthetic catalysis. To overcome these barriers, ligated Ni(0) nanoparticles (diameter <1 nm) containing a min. amount of Pd(0) in the microballs formed of amphiphile PS-750-M are developed and applied in the highly selective carbamate cleavage. Selectivity and functional group tolerance are thoroughly investigated. Control experiments revealed the importance of an individual component of the nanocatalyst. Use of our proline-based amphiphile PS-750-M is critical for achieving microball architecture, the stability of nanoparticles, and desired catalytic activity. Once formed, microballs can be isolated and stored at ambient temperature Catalyst is thoroughly characterized by XPS, SEM, high-resolution transmission electron microscopy, thermogravimetric anal., IR, and cyclic voltammetry. For selective catalysis, zero oxidation state of both Ni and Pd is crucial. On the basis of catalyst characterization and control experiments, the plausible reaction mechanism is proposed. ACS Catalysis published new progress about Binding energy. 34637-22-4 belongs to class esters-buliding-blocks, and the molecular formula is C11H15NO3, COA of Formula: C11H15NO3.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Jochum, Florian D.; Theato, Patrick published the artcile< Thermo- and light responsive micellation of azobenzene containing block copolymers>, Reference of 71195-85-2, the main research area is reversible micellization azobenzene containing block polyoxyethylene polyisopropylacrylamide copolymer.

In this communication, the synthesis and characterization of thermo- and light-responsive block copolymers is reported. PEO-b-PNIPAM polymers with azobenzene moieties were prepared and analyzed by turbidimetry, fluorescence, NMR and DLS measurements. A temperature controlled reversible formation as well as a light induced disruption and reformation of micellar structures in water was found.

Chemical Communications (Cambridge, United Kingdom) published new progress about Hydrodynamic radius. 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, Reference of 71195-85-2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Kibrom, Asmorom; Roskamp, Robert F.; Jonas, Ulrich; Menges, Bernhard; Knoll, Wolfgang; Paulsen, Harald; Naumann, Renate L. C. published the artcile< Hydrogel-supported protein-tethered bilayer lipid membranes: a new approach toward polymer-supported lipid membranes>, Safety of Perfluorophenyl acrylate, the main research area is Paracoccus microscopyhydrogel supported protein tethered bilayer lipid membrane.

Polymer-supported bilayer lipid membranes offer great opportunities for the investigation of functional membrane proteins. Here we present a new approach in this direction by introducing a thin hydrogel layer as a soft cushion’ on indium-tin oxide (ITO), providing a smooth, functional surface to form the protein-tethered BLM (ptBLM). ITO was used as a transparent electrode, enabling simultaneous implementation of electrochem. and optical waveguide techniques. The hydrogel poly(N-(2-hydroxyethyl)acrylamide-co-5-acrylamido-1-carboxypentyl-iminodiacetate-co-4-benzoylphenyl methacrylate) (P(HEAAm-co-NTAAAm-co-MABP)) was functionalized with the nickel chelating nitrilotriacetic acid (NTA) groups, to which cytochrome c oxidase (CcO) from Paracoccus denitrificans was bound in a well defined orientation via a his-tag attached to its subunit I. Given that the mesh size of P(HEAAm-co-NTAAAm-co-MABP) was smaller than the protein size, binding to the hydrogel occurred only on the top of the layer. The lipid bilayer was formed around the protein by in situ dialysis. Electrochem. impedance spectroscopy showed good elec. sealing properties with a resistance of ∼1 MΩ cm2. Furthermore, surface plasmon resonance optical waveguide spectroscopy (SPR/OWS) indicated an increased anisotropy of the system after formation of the lipid bilayer. Cyclic voltammetry in the presence of reduced cytochrome c demonstrated that CcO was incorporated into the gel-supported ptBLM in a functionally active form.

Soft Matter published new progress about Atomic force microscopy. 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, Safety of Perfluorophenyl acrylate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Yang, Mi-Li; Li, Yu-Qin; Li, He; Jiang, Li; Wang, Zheng; Jin, Lu; Wang, Huan-huan; Zhou, Rong published the artcile< CuCl-Catalyzed Conversion of Aryl Boronic Acids and Carbon Dioxide to Carboxylate Esters>, Category: esters-buliding-blocks, the main research area is arylboronic acid carbon dioxide iodomethane copper catalyst esterification; aryl methyl carboxylate ester preparation.

The CuCl-catalyzed reaction of arylboronic acids with carbon dioxide to form carboxylate ester after treatment with CH3I was developed. The procedure featured mild conditions and good functional group tolerances. A diverse range of arylboronic acids were effectively converted into carboxylate esters. Even those bearing sensitive groups such as carbonyl, ester and amide could produce the desired products in good yields.

European Journal of Organic Chemistry published new progress about Aromatic carboxylic acids, esters Role: SPN (Synthetic Preparation), PREP (Preparation). 2557-13-3 belongs to class esters-buliding-blocks, and the molecular formula is C9H7F3O2, Category: esters-buliding-blocks.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Uvyn, Annemiek; De Coen, Ruben; De Wever, Olivier; Deswarte, Kim; Lambrecht, Bart N.; De Geest, Bruno G. published the artcile< Cell surface clicking of antibody-recruiting polymers to metabolically azide-labeled cancer cells>, Name: Perfluorophenyl acrylate, the main research area is antibody recruiting polymer tumor binding innate immunity.

Triggering antibody-mediated innate immune mechanisms to kill cancer cells is an attractive therapeutic avenue. In this context, recruitment of endogenous antibodies to the cancer cell surface could be a viable alternative to the use of monoclonal antibodies. We report on antibody-recruiting polymers containing multiple antibody-binding hapten motifs and cyclooctynes that can covalently conjugate to azides introduced onto the glycocalyx of cancer cells by metabolic labeling with azido sugars.

Chemical Communications (Cambridge, United Kingdom) published new progress about Animal tissue culture (2D, 3D). 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, Name: Perfluorophenyl acrylate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Zhuang, Jiaming; Chacko, Reuben; Amado Torres, Diego F.; Wang, Hui; Thayumanavan, S. published the artcile< Dual Stimuli-Dual Response Nanoassemblies Prepared from a Simple Homopolymer>, COA of Formula: C9H3F5O2, the main research area is pH redox responsive nanogel polyelectrolyte nanoassembly guest encapsulation.

A dual stimuli responsive nanogel-polyelectrolyte complex based on electrostatic coating has been developed. The nanoassembly is designed to elicit two disparate responses (viz., surface property change and guest encapsulation stability) from two different stimuli (viz., pH and redox variations). The components of the nanogel and the polyelectrolyte have been conveniently achieved from a simple homopolymer, poly(pentafluorophenyl acrylate).

ACS Macro Letters published new progress about Encapsulation. 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, COA of Formula: C9H3F5O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Zong, Jingyi; Cobb, Steven L.; Cameron, Neil R. published the artcile< Preparation and thermally-induced self-assembly behaviour of elastin-like peptide side-chain polymer-gold nanoparticle (ESP-GNP) hybrids>, Application In Synthesis of 71195-85-2, the main research area is gold nanoparticle elastin peptide self assembly polydispersity CD.

Thermoresponsive gold nanoparticles were prepared by conjugation of short pentapeptide sequences, containing the elastin-like peptide (ELP) repeat unit Val-Pro-Gly-Val-Gly (VPGVG), to a well-defined active ester prepolymer, poly(pentafluorophenyl acrylate) (pPFPA), itself prepared by RAFT polymerization Polymers with number-average chain lengths of 25, 50, 75 and 100 were prepared The cloud points of their aqueous solutions was found to decrease with chain length and peptide sequence, and varied from 76 to 42 °C. CD indicated that the cloud point behavior was accompanied by a reversible change in peptide conformation from a random coil to a β-turn. The resulting thermoresponsive elastin peptide side-chain polymers (ESPs) were then conjugated to gold nanoparticles (GNPs) by ligand exchange. The resulting ESP-GNPs similarly displayed thermo-reversible aggregation with transition temperature (Tt) values of 65 and 35 °C for ESPs of chain length 75 and 100, resp.

ARKIVOC (Gainesville, FL, United States) published new progress about Aggregation. 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, Application In Synthesis of 71195-85-2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

ter Huurne, Gijs M.; Vantomme, Ghislaine; van den Bersselaar, Bart W. L.; Thota, Bala N. S.; Voets, Ilja K.; Palmans, Anja R. A.; Meijer, E. W. published the artcile< The effect of dendritic pendants on the folding of amphiphilic copolymers via supramolecular interactions>, Computed Properties of 71195-85-2, the main research area is dendritic pendant amphiphilic polyacrylate supramol interaction.

The supramol. folding of amphiphilic heterograft copolymers equipped with dendritic pendants is investigated using a combination of proton NMR (1H NMR) spectroscopy, small-angle X-ray scattering, and CD spectroscopy. Hereto, the linear poly(ethylene glycol) pendants normally used to convey water compatibility are partially substituted with branched analogs. For one set of copolymers, second-generation polyglycerol dendrons are directly attached to the polymer backbone, while for the other a hydrophilic linker is placed in between. The results show that the branching of the hydrophilic pendants affects the local structure of the folded copolymer but does not influence the overall conformation and single-chain character of the folded copolymers in solution All copolymers fold into 4-5 nm single-chain polymeric nanoparticles with a very compact spherical morphol., independent of the dendritic content of the copolymer. Intriguingly, the incorporation of the dendritic pendants affects the formation of a structured interior even at low incorporation ratios. © 2018 Wiley Periodicals, Inc.J. Polym. Sci., Part A: Polym.Chem. 2018.

Journal of Polymer Science, Part A: Polymer Chemistry published new progress about Fluoropolymers Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, Computed Properties of 71195-85-2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Shang, Jiaojiao; Lin, Shaojian; Theato, Patrick published the artcile< UV-triggered shape-controllable PP fabric>, COA of Formula: C9H3F5O2, the main research area is polypropylene fabric spin coating glass transition temperature flexibility.

A light-driven polypropylene (PP) fabric as an actuator was fabricated in which a light-responsive polymeric film acts as an active layer and a PP fabric acts as a passive layer. For this, poly[di(ethylene glycol)methyl ether methacrylate-co-pentafluorophenyl acrylate] P(DEGMA-co-PFPA) containing reactive pentafluorophenyl esters was synthesized as a precursor polymer. Owing to the highly reactive esters on P(DEGMA-co-PFPA), photoactive azobenzene moieties were introduced onto the polymer backbone via a post-modification polymerization strategy to form a light-responsive polymer, poly[di(ethylene glycol)methyl ether methacrylate-co-4-(4-methoxy-phenylazo) acrylate] (P(DEGMA-co-MOPAzo)). Interestingly, this copolymer can be attached in a simple and stable manner to the surface of a PP fabric via phys. adsorption to build a light-responsive PP fabric. On account of its light responsiveness, this functional polymer PP fabric can immediately respond to a UV stimulus and show a reversible shape transition upon alternating exposure to UV irradiation and the addition of heat.

Polymer Chemistry published new progress about Actuators. 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, COA of Formula: C9H3F5O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics