Tag: M.W=200-250

Boyer, Cyrille; Whittaker, Michael; Davis, Thomas P. published the artcile< Synthesis and postfunctionalization of well-defined star polymers via ""double"" click chemistry>, Category: esters-buliding-blocks, the main research area is functionalization perfluorophenyl acrylate polymer Click chem.

In this article, the synthesis and the functionalization of well-defined, narrow polydispersity (polydispersity index < 1.2) star polymers via reversible addition-fragmentation chain transfer polymerization is detailed. In this arm first approach, the initial synthesis of a poly(pentafluorophenyl acrylate) polymer, and subsequent, crosslinking using bis-acrylamide to prepare star polymers, has been achieved by reversible addition fragmentation chain transfer polymerization These star polymers were functionalized using a variety of amino functional groups via nucleophilic substitution of pentafluorophenyl activated ester to yield star polymers with predesigned chem. functionality. This approach has allowed the synthesis of star glycopolymer using a very simple approach. Finally, the core of the stars was modified via thiol-ene click chem. reaction using fluorescein-o-acrylate and DyLigh 633 Maleimide. © 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2011. Journal of Polymer Science, Part A: Polymer Chemistry published new progress about Fluoropolymers Role: PRP (Properties), SPN (Synthetic Preparation), PREP (Preparation) (star). 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, Category: esters-buliding-blocks.

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

Wang, C. X.; Braendle, A.; Menyo, M. S.; Pester, C. W.; Perl, E. E.; Arias, I.; Hawker, C. J.; Klinger, D. published the artcile< Catechol-based layer-by-layer assembly of composite coatings: a versatile platform to hierarchical nano-materials>, Reference of 71195-85-2, the main research area is silica titanium dioxide catechol based polymer composite dip coating; layer by layer assembly refractive index.

Inspired by the marine mussel’s ability to adhere to surfaces underwater, an aqueous catechol-based dip coating platform was developed. Using a catechol-functionalized polyacrylamide binder in combination with inorganic nanoparticles enables the facile fabrication of robust composite coatings via a layer-by-layer process. This modular assembly of well-defined building blocks provides a versatile alternative to electrostatic driven approaches with layer thickness and refractive indexes being readily tunable. The platform nature of this approach enables the fabrication of hierarchically ordered nano-materials such as Bragg stacks.

Soft Matter published new progress about Coating materials. 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

Jochum, Florian D.; Theato, Patrick published the artcile< Temperature and light sensitive copolymers containing azobenzene moieties prepared via a polymer analogous reaction>, Computed Properties of 71195-85-2, the main research area is azobenzene temperature light sensitive copolymer.

Four different series of polyacrylamides containing different amounts of azobenzene moieties have been synthesized via a polymer analogous reaction of poly(pentafluorophenylacrylate) (PPFPA). All copolymers were designed to exhibit a lower critical solution temperature (LCST) in aqueous solution, which was dependent on (i) the amount of incorporated chromophoric azobenzene groups and (ii) the isomerization state of the resp. azobenzene group. Higher LCST values were measured for UV-irradiated solutions of the copolymers in comparison to the non-irradiated copolymer solutions A maximum difference in the LCST of up to 7 °C was found for the copolymer poly(N,N-dimethylacrylamide) containing 8.5 mol% of azobenzene groups. Within this temperature range, a reversible solubility change of the copolymer could be induced by irradiation with light.

Polymer 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

Lee, Seong Ri; Kim, Mi Ran; Jo, Eun Hae; Yoon, Keun-Byoung published the artcile< Synthesis of very low birefringence polymers using fluorinated macromers for polymeric waveguides>, Reference of 71195-85-2, the main research area is fluorinated macromer synthesis polymeric waveguide birefringence.

A series of highly fluorinated acrylic macromers and monomers containing perfluoroalkyl, perfluorophenyl, and perfluorocyclohexyl pendant groups were synthesized in an attempt at reducing absorption losses and birefringences. The macromers, prepared by the anionic polymerization of fluorinated acrylic monomers, were viscous liquids with number average mol. weights of 15,000-16,000 g mol-1. Macromer and monomer mixtures that generally exhibited viscosities suitable for the UV-imprint process were photopolymerized to prepare the polymeric films. At 850 nm, the films had very low birefringences (approx. 0.0001) and their refractive indexes (RIs) were linearly dependent on the mixture compositions; this allowed the RIs of films to be fine-tuned within at certain range. At 850 nm, the propagation losses of the multimode waveguides ranged from 0.12 dB cm-1 to 0.15 dB cm-1, demonstrating that these polymers are potentially useful as optically passive waveguide materials.

High Performance Polymers published new progress about Birefringence. 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

Zheng, Shuai; Zhang, Shuo-Qing; Saeednia, Borna; Zhou, Jiawang; Anna, Jessica M.; Hong, Xin; Molander, Gary A. published the artcile< Diastereoselective olefin amidoacylation via photoredox PCET/nickel-dual catalysis: reaction scope and mechanistic insights>, Product Details of C11H15NO3, the main research area is lactam preparation regioselective diastereoselective DFT Gibbs free energy; alkene iridium nickel photocatalyst amidoacylation cyclization.

Synthesis of cyclic amides such as I via regio- and diastereoselective amidoacylation of unactivated olefins by using photoredox proton-coupled electron transfer (PCET)/Ni dual-catalysis was developed. Various acyl electrophiles were compatible, including alkyl- and aryl acyl chlorides and anhydrides, as well as in situ activated carboxylic acids. Hammett studies and other mechanistic experiments to elucidate features of the diastereoselectivity, a transient absorption study of the PCET step, as well as computational evidence, provide an in-depth understanding of the disclosed transformation.

Chemical Science published new progress about Acid chlorides Role: RCT (Reactant), RACT (Reactant or Reagent). 34637-22-4 belongs to class esters-buliding-blocks, and the molecular formula is C11H15NO3, Product Details of C11H15NO3.

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

Liu, Zhi; Qiao, Jing; Nagy, Tamas; Xiong, May P. published the artcile< ROS-triggered degradable iron-chelating nanogels: Safely improving iron elimination in vivo>, Reference of 71195-85-2, the main research area is ROS responsive polymeric deferoxamine nanogel iron chelation therapy; Chelation therapy; Deferoxamine (DFO); Iron overload (IO); Nanogel; Reactive oxygen species (ROS).

Iron-mediated generation of highly toxic Reactive Oxygen Species (ROS) plays a major role in the process leading to iron overload-related diseases. The long-term s.c. administration of Deferoxamine (DFO) is currently clin.-approved to improve patient symptoms and survival. However, non-specific toxicity and short circulation times of the drug in humans often leads to poor patient compliance. Herein, thioketal-based ROS-responsive polymeric nanogels containing DFO moieties (rNG-DFO) were designed to chelate iron and to degrade under oxidative stimuli into fragments <10 nm to enhance excretion of iron-bound chelates. Serum ferritin levels and iron concentrations in major organs of IO mice decreased following treatment with rNG-DFO, and fecal elimination of iron-bound chelates increased compared to free DFO. Furthermore, rNG-DFO decreased iron mediated oxidative stress levels in vitro and reduced iron-mediated inflammation in the liver of IO mice. The study confirms that ROS-responsive nanogels may serve as a promising alternative to DFO for safer and more efficient iron chelation therapy. Journal of Controlled Release published new progress about Chelation. 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

zur Borg, Lisa; Schuell, Christoph; Frey, Holger; Zentel, Rudolf published the artcile< Directing the Self-Assembly of Semiconducting Copolymers: The Consequences of Grafting Linear or Hyperbranched Polyether Side Chains>, HPLC of Formula: 71195-85-2, the main research area is self assembly semiconducting copolymer grafting linear hyperbranched polyether chain; Block copolymers; hyperbranched polyglycerols; micelles; poly(para-phenylene vinylene); semiconducting materials.

The synthesis and self-assembly of novel semiconducting rod-coil type graft block copolymers based on poly(para-phenylene vinylene) (PPV) copolymers is presented, focusing on the ordering effect of linear vs. hyperbranched side chains. Using an addnl. reactive ester block, highly polar, linear poly(ethylene glycol), and hyperbranched polyglycerol side chains are attached in a grafting-to approach. Remarkably, the resulting novel semiconducting graft copolymers with polyether side chains show different solubility and side-chain directed self-assembly behavior in various solvents, e.g., cylindrical or spherical superstructures in the size range of 10 to 120 nm, as shown by TEM. By adjusting the mol. weight and the topol. of the polyether segments, self-assembly into defined superstructures can be achieved, which is important for the efficient charge transport in potential electronic applications.

Macromolecular Rapid Communications published new progress about Branched polymers, hyperbranched dendritic polymers Role: PRP (Properties), SPN (Synthetic Preparation), PREP (Preparation) (polyether-polyphenylenevinylenes, diblock, graft). 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, HPLC of Formula: 71195-85-2.

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

Akram, Muhammad; Mei, Zhipeng; Shi, Jiayan; Wen, Jiayue; Khalid, Hamad; Jiang, Jiapei; Tian, Yanhong; Tian, Yanqing published the artcile< Electrospun nanofibers and spin coated films prepared from side-chain copolymers with chemically bounded platinum (II) porphyrin moieties for oxygen sensing and pressure sensitive paints>, Synthetic Route of 71195-85-2, the main research area is electrospun nanofiber spin coated film side chain copolymer; Fluorinated polymers; Nanofibers; Oxygen responses; Oxygen sensing; Pressure sensitive paints.

Pressure sensitive paints (PSP) containing oxygen probes were primarily used to measure air pressure. In this perspective, a polymerizable methacrylate-derived tetraphenylporphinato platinum(II) (PtTPP-MA) monomer was copolymerized with acrylic/vinyl monomers to produce four different copolymers. Octafluoropentyl methacrylate (OCFPM) and pentafluorophenyl acrylate (PFPA) were used as fluorinated monomers. Me methacrylate (MMA) and styrene (S) were used as non-fluorinated monomers. The structures and phys. properties of the polymers were confirmed by 1H NMR, 19F NMR, GPC, and DSC. Exptl. conditions were optimized to get fine nanofibers. Pressure sensing electrospun membranes and spin coated films were fabricated. Nanofibers showed fast response and good sensitivity towards gaseous oxygen. The influence of types of substrate and polymer natures on response time, oxygen sensitivity, and pressure responses were deliberated. Among our synthesized copolymers, poly(PS-co-PFPA-co-OCFPM-co-PtTPPMA) (Polymer P3) showed fast response time and good pressure sensitivity both as spin coated films and nanofibers.

Talanta published new progress about Acrylic fibers, fluorine-containing Role: PEP (Physical, Engineering or Chemical Process), PRP (Properties), SPN (Synthetic Preparation), TEM (Technical or Engineered Material Use), PROC (Process), PREP (Preparation), USES (Uses). 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, Synthetic Route of 71195-85-2.

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

Cao, Ya-Fang; Li, Ling-Jun; Liu, Min; Xu, Hui; Dai, Hui-Xiong published the artcile< Palladium-Catalyzed, Copper(I)-Promoted Methoxycarbonylation of Arylboronic Acids with O-Methyl S-Aryl Thiocarbonates>, Application In Synthesis of 2557-13-3, the main research area is palladium catalyst copper methoxycarbonylation arylboronic acid Me aryl thiocarbonate.

Here, we report O-Me S-aryl thiocarbonates as a versatile esterification reagent for palladium-catalyzed methoxycarbonylation of arylboronic acid in the presence of copper(I) thiophene-2-carboxylate (CuTC). The reaction condition is mild, and a variety of substituents including sensitive -Cl, -Br, and free -NH2 could be tolerated. Further applications in the late-stage esterification of some pharmaceutical drugs demonstrate the broad utility of this method.

Journal of Organic Chemistry published new progress about Arylboronic acids Role: RCT (Reactant), RACT (Reactant or Reagent). 2557-13-3 belongs to class esters-buliding-blocks, and the molecular formula is C9H7F3O2, Application In Synthesis of 2557-13-3.

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

Tjandra, Kristel C.; Forest, Chelsea R.; Wong, Chin Ken; Alcantara, Sheilajen; Kelly, Hannah G.; Ju, Yi; Stenzel, Martina H.; McCarroll, Joshua A.; Kavallaris, Maria; Caruso, Frank; Kent, Stephen J.; Thordarson, Pall published the artcile< Modulating the Selectivity and Stealth Properties of Ellipsoidal Polymersomes through a Multivalent Peptide Ligand Display>, SDS of cas: 71195-85-2, the main research area is medulloblastoma polymersome peptide ligand display; cancer drug delivery; multivalency; nanomedicines; peptides; polymeric nanoparticles; targeting ligands.

There is a need for improved nanomaterials to simultaneously target cancer cells and avoid non-specific clearance by phagocytes. An ellipsoidal polymersome system is developed with a unique tunable size and shape property. These particles are functionalized with inhouse phage-display cell-targeting peptide to target a medulloblastoma cell line in vitro. Particle association with medulloblastoma cells is modulated by tuning the peptide ligand d. on the particles. These polymersomes has low levels of association with primary human blood phagocytes. The stealth properties of the polymersomes are further improved by including the peptide targeting moiety, an effect that is likely driven by the peptide protecting the particles from binding blood plasma proteins. Overall, this ellipsoidal polymersome system provides a promising platform to explore tumor cell targeting in vivo.

Advanced Healthcare Materials published new progress about B cell. 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, SDS of cas: 71195-85-2.

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