Category: 71195-85-2

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

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

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

Liu, Yiliu; Turunen, Petri; de Waal, Bas F. M.; Blank, Kerstin G.; Rowan, Alan E.; Palmans, Anja R. A.; Meijer, E. W. published the artcile< Catalytic single-chain polymeric nanoparticles at work: from ensemble towards single-particle kinetics>, Computed Properties of 71195-85-2, the main research area is catalytic single chain polymeric nanoparticle design preparation.

Folding a single polymer chain around catalytically active sites to construct catalytic single chain polymeric nanoparticles (SCPNs) is a novel approach to mimic the activity and selectivity of enzymes. In order to relate the efficiency of SCPNs to their three-dimensional structure, a better understanding of their catalytic activity at an individual level, rather than at an ensemble level, is highly desirable. In this work, we present the design and preparation of catalytic SCPNs and a family of fluorogenic substrates, their characterization at the ensemble level as well as our progress toward analyzing individual SCPNs with single-mol. fluorescence microscopy. Firstly, organocopper-based SCPNs together with rhodamine-based fluorogenic substrates were designed and synthesized. The SCPNs catalyze the carbamate cleavage reaction of mono-protected rhodamines, with the dimethylpropargyloxycarbonyl protecting group being cleaved most efficiently. A systematic study focusing on the conditions during catalysis revealed that the ligand acceleration effect as well as the accumulation of substrates and catalytically active sites in SCPNs significantly promote their catalytic performance. Secondly, a streptavidin-biotin based strategy was developed to immobilize the catalytic SCPNs on the surface of glass coverslips. Fluorescence correlation spectroscopy experiments confirmed that the SCPNs remained catalytically active after surface immobilization. Finally, single-SCPN activity measurements were performed. The results qual. indicated that fluorescent product mols. were formed as a result of the catalytic reaction and that individual fluorescent product mols. could be detected. So far, no evidence for strongly different behaviors has been observed when comparing individual SCPNs.

Molecular Systems Design & Engineering published new progress about Catalysts. 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

Joehnck, Matthias; Kalveram, Stefan; Lehmacher, Stefan; Pompe, Guido; Rudolph, Stefan; Neyer, Andreas; Hofstraat, Johannes W. published the artcile< Characterization of passive polymer optical waveguides>, Product Details of C9H3F5O2, the main research area is polymer optical waveguide tetrachloroethylacrylate tetrachloroethylmethacrylate POPCORN technol; pentafluorophenylacrylatete pentafluorophenylmethacrylate polymer optical waveguide.

The characterization of monomode passive polymer optical devices fabricated according to the POPCORN technol. by methods originated from electron, ion and optical spectroscopy is summarized. Impacts of observed waveguide perturbations on the optical characteristics of the waveguide are evaluated. In the POPCORN approach optical components for telecommunication applications are fabricated by photo-curing of liquid halogenated (meth)acrylates which were applied on molded thermoplastic substrates. For tuning of waveguide material refractive indexes with respect to the substrate refractive index frequently comonomer mixtures are used. The polymerization characteristics, especially the polymerization kinetics of individual monomers, determine the formation of copolymers. Therefore the unsaturation as function of UV-illumination time in the formation of halogenated homo- and copolymers was examined From different suitable copolymer system, after characterization of their glass transition temperatures, their curing behavior and their refractive indexes as function of the monomer ratios, monomode waveguides applying PMMA substrates were fabricated. To examine the materials composition also in the 6 X 6 μm2 waveguides they were visualized by TEM. With this method, e.g., segregation phenomena could be observed in the waveguide cross section characterization as well. The optical losses in monomode waveguides caused by segregation and other materials induce defects like micro bubbles formed as a result of shrinkage were quantized by return loss measurements. Defects causing scattering could be observed by confocal laser scanning microscopy and by conventional light microscopy.

Proceedings of SPIE-The International Society for Optical Engineering published new progress about Optical waveguides. 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, Product Details of C9H3F5O2.

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

Son, Hyunjoo; Ku, Jayoung; Kim, Yoosik; Li, Sheng; Char, Kookheon published the artcile< Amine-Reactive Poly(pentafluorophenyl acrylate) Brush Platforms for Cleaner Protein Purification>, HPLC of Formula: 71195-85-2, the main research area is protein purification polymer brush polypentafluorophenyl acrylate.

Reactive pentafluorophenyl acrylate (PFPA) polymer brushes grafted on silica particles were prepared using surface-initiated reversible addition and fragmentation chain transfer polymerization The polymer brush was successfully immobilized with antibody, then used for protein separation The immunoprecipitated proteins showed successful enrichment of target protein, with reduced nonspecific background and less contamination from eluted antibodies. To further improve protein recovery, the hydrophobic poly(PFPA) brush was modified with hydrophilic poly(ethylene glycol) (PEG). The partially PEG-substituted poly(PFPA) brush showed better dispersion in aqueous solution, leading to improved antibody immobilization efficiency. By optimizing both the brush mol. weight and the degree of PEG substitution, an optimal balance between surface hydrophilicity and number of available PFP units was found, leading to efficient target protein purification This study shows that poly(PFPA) platform offers a versatile approach to prepare biomol.-activated surfaces with tunable surface property, which has potential applications in protein separation and other areas.

Biomacromolecules published new progress about Antibodies and Immunoglobulins Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 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