Category: 71195-85-2

Quek, Jing Yang; Roth, Peter J.; Evans, Richard A.; Davis, Thomas P.; Lowe, Andrew B. published the artcile< Reversible addition-fragmentation chain transfer synthesis of amidine-based, CO2-responsive homo and AB diblock (Co)polymers comprised of histamine and their gas-triggered self-assembly in water>, Related Products of 71195-85-2, the main research area is fluoropolymer radical polymerization RAFT hydrodynamic radius self assembly micelle.

Well-defined homopolymers of pentafluorophenyl acrylate (PFPA) and AB diblock copolymers of N,N-dimethylacrylamide (DMA) and poly(ethylene glycol) Me ether acrylate (PEGA) with PFPA were prepared by reversible addition-fragmentation chain transfer (RAFT) radical polymerization Three PFPA homopolymers of different mol. weights were reacted with the com. available amidine and guanidine species histamine (HIS) dihydrochloride and L-arginine Me ester (ARG) dihydrochloride in the presence of S-Me methanethiosulfonate to yield, quant., the corresponding amidine and guanidine-based acrylamido homopolymers. Both the HIS and ARG homopolymers are known to reversibly bind CO2 with, in the case of the former, CO2 fixation being accompanied with a switch from a hydrophobic to hydrophilic state. The RAFT synthesis of PFPA-DMA and PEGA-PFPA diblock copolymers yielded well-defined materials with a range of molar compositions These precursor materials were converted to the corresponding HIS and ARG block copolymers whose structure was confirmed using 1H NMR spectroscopy. Employing a combination of dynamic light scattering and transmission electron microscopy, we demonstrate that the DMA-HIS and PEGA-HIS diblock copolymers are able to undergo reversible and cyclable self-directed assembly in aqueous media using CO2 and N2 as the triggers between fully hydrophilic and amphiphilic (assembled) states. For example, in the case of the 54:46 DMA-HIS diblock, aggregates with hydrodynamic diameters of about 40.0 nm are readily formed from the molecularly dissolved state. © 2012 Wiley Periodicals, Inc., J Polym Sci Part A: Polym Chem, 2012.

Journal of Polymer Science, Part A: Polymer Chemistry published new progress about Fluoropolymers Role: PEP (Physical, Engineering or Chemical Process), PRP (Properties), SPN (Synthetic Preparation), PROC (Process), PREP (Preparation). 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, Related Products of 71195-85-2.

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

Boyer, Cyrille; Whittaker, Michael; Liu, Jinna; Davis, Thomas P. published the artcile< Synthesis and post-functionalization of well-defined star polymers via ""double"" click chemistry>, Safety of Perfluorophenyl acrylate, the main research area is functionalization perfluorophenyl acrylate star polymer click chem.

In this communication, the synthesis and the functionalization of well-defined, narrow polydispersity (PDI < 1.2) star polymers via RAFT polymerization is detailed. In this arm first approach, the initial synthesis of a poly(pentafluorophenyl acrylate) arm and subsequent crosslinking using bis-acrylamide to prepare star polymers, was achieved by RAFT polymerization These star polymers were functionalized using a variety of amino functional groups via nucleophilic substitution to yield star polymers with predesigned chem. functionality. Finally, the core of the stars was modified via thiol-ene click chem. reaction using fluorescein-o-acrylate and DyLight 633 Maleimide. PMSE Preprints published new progress about Branched polymers, star-branched Role: PRP (Properties), SPN (Synthetic Preparation), PREP (Preparation). 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

Boyer, Cyrille; Davis, Thomas P. published the artcile< One- pot synthesis and biofunctionalization of glycopolymers via RAFT polymerization and thiol-ene reactions>, SDS of cas: 71195-85-2, the main research area is one pot synthesis biofunctionalization glycopolymer RAFT polymerization thiol ene.

A modification of a polymeric activated ester with sugar-amines and a simultaneous aminolysis-thiol-ene reaction involving the RAFT end-groups yield biotin functionalized glycopolymer in one-pot.

Chemical Communications (Cambridge, United Kingdom) published new progress about RAFT polymerization. 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

Doncom, Kay E. B.; Hansell, Claire F.; Theato, Patrick; O’Reilly, Rachel K. published the artcile< Synthesis of Responsive Polymers by RAFT Polymerization, and their Self-assembly into Morphology Switching Nanostructures>, Recommanded Product: Perfluorophenyl acrylate, the main research area is pH responsive amphiphilic block copolymer self assembly.

A new diblock copolymer containing a hydrophobic block, a pH responsive block and a hydrophilic end group has been synthesized by substitution of an activated ester scaffold. The scaffold was synthesized by RAFT polymerization chemistries. The self-assembly behavior of the polymer formed has been investigated and it is shown that it undergoes a morphol. transition upon decreasing the pH below the pKa of the responsive block. It is also shown that the self-assembled structures are capable of trapping a hydrophilic dye mol. and releasing it in a controlled manner upon application of the stimulus.

PMSE Preprints published new progress about Micelles. 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, Recommanded Product: Perfluorophenyl acrylate.

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

Orzolek, Brandon J.; Rahman, Anisur Md; Iovine, Peter M. published the artcile< Synthesis of Biorenewable Starch-Farnesene Amphiphilic Conjugates via Transesterification of Terpene-Derived Diels-Alder Adducts>, Recommanded Product: Perfluorophenyl acrylate, the main research area is synthesis biorenewable starch farnesene amphiphilic conjugate; transesterification terpene derived Diels Alder adduct.

Herein we describe a new class of terpene-starch esters synthesized from biorenewable building blocks. Although our work is specific to starch, we believe the synthetic methodol. can be extended to a wide range of polysaccharide substrates. In our approach, an ester functionality is first introduced to the farnesene backbone via high yielding, solvent-free Diels-Alder chem. The farnesene esters are subsequently transesterified with starch to produce a range of starch-farnesene amphiphilic biopolymers. The key transesterification reaction between farnesene and starch employs 1,5,6-triazabicyclo[4.4.0]dec-5-ene (TBD) as a guanidine base organocatalyst and is capable of producing materials with a high degree of substitution (DS). The DS can be modulated by altering the starch/farnesene feed ratio. Low DS starch-farnesene esters show surfactant-like properties while the higher DS materials were successfully solvent-cast into standalone films. Thermal and mech. tests reveal starch-farnesene esters to be robust under both solution and thermal processing conditions. Given the versatility of the synthetic method, the biorenewability of the components, and the biodegradability of the ester linkage joining the subunits, the newly produced polymer amphiphiles appear to be a promising class of new green materials.

ACS Sustainable Chemistry & Engineering published new progress about Amphiphiles. 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, Recommanded Product: Perfluorophenyl acrylate.

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

Xu, Li Qun published the artcile< Ruthenium(II)-terpyridine complexes-containing glyconanoparticles for one- and two-photon excited fluorescence imaging>, Safety of Perfluorophenyl acrylate, the main research area is ruthenium terpyridine complex glyconanoparticle fluorescence cell imaging.

The synthesis of ruthenium(II)-terpyridine complexes-containing glyconanoparticles (Ru-GNPs) for one- and two-photon excited fluorescence imaging was described. Ru-GNPs were built from diblock copolymers of pentafluorophenyl acrylate (PFA) and 2-(2′,3′,4′,6′-tetra-O-acetyl-尾-D-glucosyloxy)ethyl methacryalte (AcGlcEMA), prepared by reversible addition-fragmentation chain transfer (RAFT) polymerization The pendant reactive pentafluorophenyl ester groups were substituted and the copolymer cross-linked by the two-photon absorption (TPA) chromophore, bis[4′-(4-aminophenyl)-2,2′:6′,2”-terpyridyl]ruthenium(II) hexafluorophosphate. After deacetylation of the acetyl-protecting groups in the AcGlcEMA block, TPA nanoparticles with cross-linked ruthenium(II)-terpyridine complexes as the core and glycopolymers as the corona were obtained. The resulting Ru-GNPs exhibit good water dispersity, one-photon absorption and emission and low cytotoxicity towards KB cell line. Ru-GNPs also undergo two-photon excitation when excited in the near-IR (NIR, 720-880 nm) in water, with TPA cross-sections in the range of 0.2-22 G枚ppert-Mayer (GM, 1 GM = 10-50 cm4 s1 photon-1). Ru-GNPs are thus potentially useful as effective cellular labeling agents for one- and two-photon excited fluorescence imaging.

European Polymer Journal published new progress about Fluorescence imaging. 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

Ulrich, Sebastian; Sadeghpour, Amin; Rossi, Rene M.; Bruns, Nico; Boesel, Luciano F. published the artcile< Wide Range of Functionalized Poly(N-alkyl acrylamide)-Based Amphiphilic Polymer Conetworks via Active Ester Precursors>, SDS of cas: 71195-85-2, the main research area is polyalkylacrylamide amphiphilic polymer network ester precursor.

A versatile strategy for the fabrication of functional poly(N-alkyl acrylamide)-based amphiphilic polymer conetworks (APCNs) from hydrophobic precursor networks is presented. Herein, the active ester monomer pentafluorophenyl acrylate (PFPA) acts as a general hydrophobic masking group for N-alkyl acrylamides. Amidation reactions with different amines allow the transformation of one PFPA-based hydrophobic precursor network into a multitude of different APCNs that possess optical transparency and nanophase-separated morphologies. Accordingly, the properties of these ACPNs can be tailored to the desired application by simple variation of the amide functionality. Furthermore, combination of PFPA with another hydrophobically masked monomer allows for the functionalization of the hydrophilic phase of APCNs in precisely defined amounts Controlled integration of pendant groups such as pH-responsive imidazole, fluorescent dyes, and biotin for specific protein binding is achieved, greatly expanding the functionality of the APCNs. Such functionalized APCNs could find application as stimuli-responsive drug delivery membranes, smart hydrogels, biosensors, or as matrixes for biocatalysis.

Macromolecules (Washington, DC, United States) published new progress about Amidation. 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

Choi, Jiyeon; Schattling, Philipp; Jochum, Florian D.; Pyun, Jeffrey; Char, Kookheon; Theato, Patrick published the artcile< Functionalization and patterning of reactive polymer brushes based on surface reversible addition and fragmentation chain transfer polymerization>, Reference of 71195-85-2, the main research area is polypentafluorophenyl acrylate polymer brush RAFT polymerization.

We present the synthesis of reactive polymer brushes prepared by surface reversible addition-fragmentation chain transfer polymerization of pentafluorophenyl acrylate. The reactive ester moieties can be used to functionalize the polymer brush film with virtually any functionality by simple post-polymerization modification with amines. Dithiobenzoic acid benzyl-(4-ethyltrimethoxylsilyl) ester was used as the surface chain transfer agent (S-CTA) and the anchoring group onto the silicon substrates. Reactive polymer brushes with adjustable mol. weight, high grafting d., and conformal coverage through the grafting-from approach were obtained. Subsequently, the reactive polymer brushes were converted with amino-spiropyrans resulting in reversible light-responsive polymer brush films. The wetting behavior could be altered by irradiation with UV or visible light. Furthermore, a patterned surface of polymer brushes was obtained using a lithog. technique. UV irradiation of the S-CTA-modified substrates leads to a selective degradation of S-CTA in the exposed areas and gives patterned activated polymer brushes after a subsequent RAFT polymerization step. Conversion of the patterned polymer brushes with 5-((2-aminoethyl)amino)naphthalene-1-sulfonic acid resulted in patterned fluorescent polymer brush films. The utilization of reactive polymer brushes offers an easy approach in the fabrication of highly functional brushes, even for functionalities whose introduction is limited by other strategies. 漏 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012.

Journal of Polymer Science, Part A: Polymer Chemistry published new progress about Binding energy. 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

Kloeckner, Benjamin; Niederer, Kerstin; Fokina, Ana; Frey, Holger; Zentel, Rudolf published the artcile< Conducting Polymer with Orthogonal Catechol and Disulfide Anchor Groups for the Assembly of Inorganic Nanostructures>, Related Products of 71195-85-2, the main research area is conducting orthogonal catechol disulfide anchor assembly inorganic nanostructure; polyoxyalkylene block graft polyvinylcarbazole coating quantum dot cadmium selenide.

To combine several inorganic components with organic material in a controlled special and permanent manner still remains a difficult issue. Two specifically functionalized block copolymers were synthesized sep. and combined in a second step. A heterofunctional poly(ethylene glycol) (PEG) block copolymer bearing a single amino unit, a short PEG spacer, and multiple catechol functionalities was obtained via anionic ring-opening polymerization (AROP). Using the reversible addition-fragmentation chain transfer (RAFT) radical polymerization technique, a semiconducting block copolymer with carbazole side groups was obtained. The second polyacrylate block contained reactive ester groups and was polymerized onto this hole conducting block. By substitution of the reactive esters with the amino functional PEG-catechol block copolymer and cysteamine Me disulfide, a hole conducting polymer material with two orthogonal anchor groups for the coating of CdSe QDs, and also for TiO2, was obtained. TEM images show that upon coating of both materials we were able to obtain QDs homogeneously distributed at the surface of TiO2 nanoparticles. This spatial assembly is a consequence of the special directing features of the copolymer, possessing two orthogonal anchor groups combined in one material.

Macromolecules (Washington, DC, United States) published new progress about Aggregates. 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, Related Products of 71195-85-2.

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

Jochum, Florian D.; Theato, Patrick published the artcile< Temperature- and Light-Responsive Polyacrylamides Prepared by a Double Polymer Analogous Reaction of Activated Ester Polymers>, Quality Control of 71195-85-2, the main research area is polyacrylamide temperature light responsive.

Two different series of polyacrylamides containing different amounts of salicylideneaniline moieties have been synthesized via a double polymer analogous reaction of poly(pentafluorophenyl acrylate) (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 salicylideneaniline groups and (ii) the isomerization state of the resp. salicylideneaniline group. Higher LCST values were measured for UV-irradiated solutions of the copolymers in comparison to the nonirradiated copolymer solutions A maximum difference in the LCST of up to 13 °C was found for poly(N-cyclopropylacrylamide) copolymer containing 15.0 mol % of salicylideneaniline groups. Within this temperature range, a reversible solubility change of the copolymer could be induced by irradiation with light.

Macromolecules (Washington, DC, United States) 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, Quality Control of 71195-85-2.

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