Abstract N –Isopropylacrylamide (NIPAM) was polymerized using 1‐pyrenyl 2‐chloropropionate (PyCP) as the initiator and CuCl/tris[2‐(dimethylamino)ethyl]amine (Me 6 TREN) catalyst system. The polymerizations were performed feed ratio of [NIPAM] 0 /[PyCP] /[CuCl] /[Me TREN] = 50/1/1/1 in DMF/water 13/2 at 20 °C to afford an end‐functionalized poly( ‐isopropylacrylamide) with pyrenyl group (Py–PNIPAM). characterization Py–PNIPAM matrix‐assisted laser desorption ionization time‐of‐flight mass...

Abstract The 2‐chloropropionamide derivative featuring an azido group is used as the initiator for ATRP of N‐ isopropylacrylamide (NIPAM) with copper( I ) chloride (CuCl) and tris[2‐(dimethylamino)ethyl]amine (Me 6 TREN) to produce PNIPAM end‐functionalized group. Subsequently, ‘click’ reaction between end‐group acetylene derivatives demonstrated in which end‐groups are modified by phenyl, 4‐phenoxyphenyl, butyl, octyl, carboxylic acid, hydroxymethyl groups. resulting show a LCST that ranges...

Precision syntheses and thermoresponsive properties for well-defined linear and/or architecturally controlled poly( N -substituted acrylamide)s are described together with their developmental history.

Abstract The synthesis of an AB 20 ‐type heteroarm star polymer consisting a polystyrene arm and 20‐arms poly(methyl methacrylate) or poly( tert ‐butyl acrylate) was carried out using the combination nitroxide‐mediated polymerization (NMP) atom transfer radical (ATRP). NMP styrene mono‐6‐[4‐(1′‐(2″,2″,6″,6″‐tetramethyl‐1″‐piperidinyloxy)‐ethyl)benzamido]‐β‐cyclodextrin peracetate ( 1 ) to afford end‐functionalized with acetylated β‐cyclodextrin (β‐CyD) unit (prepolymer 2 number‐average...

ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication the EditorNEXTAtom Transfer Radical Polymerization of Methyl Methacrylate in Fluoroalcohol: Simultaneous Control Molecular Weight and TacticityYutaka Miura, Toshifumi Satoh, Atsushi Narumi, Osamu Nishizawa, Yoshio Okamoto, Toyoji KakuchiView Author Information Division Chemistry, Graduate School Engineering, Hokkaido University, Sapporo 060-8628, Japan; MCC-Group Science & Technology Research Center, Mitsubishi Chemical...

The core-first synthesis of three-, four-, and six-armed star-shaped poly(methyl methacrylate)s (PMMAs) with predicted molecular weights narrow weight distributions (Mw/Mns) was carried out by the t-Bu-P4-catalyzed group transfer polymerization (GTP) methyl methacrylate (MMA) using newly designed silyl enolates, such as 1,1,1-tris[2-methyl-1-(trimethylsilyloxy)prop-1-enyloxymethyl]propane (EtC(MTS)3), tetrakis{[2-methyl-1-(trimethylsilyloxy)prop-1-enyloxy]methyl}methane (C(MTS)4),...

Photodynamic therapy (PDT) exploits light interactions and photosensitizers to induce cytotoxic reactive oxygen species. diagnosis (PDD) uses the phenomenon of photosensitizer emitting fluorescence distinguish some tumors from normal tissue. The standard used for PDD is 5-aminolevulinic acid (5-ALA), although it not entirely satisfactory. We previously reported glucose-conjugated chlorin (G-chlorin) as a more effective than another widely photosensitizer, talaporfin sodium (TS); however,...

We report the chiroptical properties and lectin affinities of poly(phenylacetylene)s featuring saccharide functionalities including d-glucopyranoside d-galactopyranoside. The glycoconjugated were synthesized by rhodium mediated polymerization from phenylacetylene monomers containing a series groups; 4-ethynylphenyl 2,3,4,6-tetra-O-acetyl-α-d-glucopyranoside (PA-α-Glc-OAc), β-d-glucopyranoside (PA-β-Glc-OAc), α-d-galactopyranoside (PA-α-Gal-OAc), β-d-galactopyranoside (PA-β-Gal-OAc). On basis...

Abstract The copper‐mediated atom transfer radical polymerization of methyl methacrylate (MMA) in 1,1,1,3,3,3‐hexafluoro‐2‐propanol (HFIP) was studied to simultaneously control the molecular weight and tacticity. using tris[2‐(dimethylamino)ethyl]amine (Me 6 TREN) as a ligand performed even at −78°C with number‐average ( M n ) 13,400 polydispersity (weight‐average weight/number‐average weight) 1.31, although measured 's were much higher than theoretical ones. addition copper(II) bromide...

The combination of (Z)-1-(dimethylamino)-1-trimethylsiloxy-1-propene ((Z)-DATP) and Brønsted acid trifluoromethanesulfonimide (Tf2NH) was found to act as a highly efficient GTP initiating system for N,N-dimethylmethacrylamide (DMAA) at 0 °C. Tf2NH-catalyzed DMAA initiated by (Z)-DATP proceeded in living manner produce poly(N,N-dimethylacrylamide)s (PDMAA) with controlled molecular weights narrow weight distributions. nature confirmed kinetic measurements postpolymerization experiment....

This paper discusses the thermoresponsive nanoparticles obtained by self-assemblies of nonlinear oligosaccharide-based diblock copolymer systems. These copolymers were synthesized Cu(I)-catalyzed 1,3-dipolar azide/alkyne cycloaddition ("click" reaction) propargyl-functionalized β-cyclodextrin (βCyD) and xyloglucooligosaccharide (XGO) with poly(N-isopropylacrylamide) (PNIPAM) having a terminal azido group prepared atom transfer radical polymerization (ATRP). Elastic quasi-elastic light...

β-Cyclodextrin (β-CyD) was modified into a seven-functional initiator (1) for 2,2,6,6-tetramethylpiperidinyloxy- (TEMPO-) mediated living radical polymerization. Styrene (St) polymerized with 1 under several conditions to afford original products I−IV. Size exclusion chromatography (SEC) traces of I−IV exhibited trimodal molecular weight distributions; hence, they were fractionated the respective three species, i.e., main 2, byproducts 3 lower weights, and 4 higher weights. The...

Conformational properties of cylindrical rod brushes consisting a flexible polystyrene main chain and poly(n-hexyl isocyanate) (PHIC) side chains have thoroughly been studied by static light small-angle X-ray scattering (SAXS) in tetrahydrofuran (THF) at 25 °C. These were prepared radical homopolymerization 4-vinylbenzyloxy-ended PHIC macromonomers (1) (VB-HIC-Ns, where Ns is the weight-averaged degree polymerization HIC range from 21 to 80) n-hexane 60 The mean-square cross-sectional radius...

Abstract A cyclic initiator for the nitroxide‐mediated controlled radical polymerization (NMP) is a powerful tool preparation of macrocyclic polymers via ring‐expansion vinyl mechanism. For this purpose, we prepared Hawker‐type NMP‐initiator that includes an azide and terminal alkyne as acyclic precursor, which subsequently tethered intramolecular azide/alkyne‐“click”‐reaction, producing final NMP‐initiator. The reactions styrene with were demonstrated resultant characterized by gel...

The graft density dependence of main chain stiffness in rod brushes composed a flexible linear polystyrene (PS) and poly(n-hexyl isocyanate) (PHIC) side chains has thoroughly been investigated by static light (LS) small-angle X-ray scattering (SAXS) measurements tetrahydrofuran (THF) at 25 °C. A series statistical copolymers having different densities (σ) lengths (PS-g-HIC-Ns-lg, where Ns is the weight-averaged degree polymerization HIC lg average distance (spacing) between joints) were...

A chlorin derivative was encircled with four maltotriose (Mal₃) molecules to produce an oligosaccharide-conjugate meeting the requirements of a third generation photodynamic therapy (PDT) photosensitizer.

Coupling reactions of 2,2,6,6-tetramethylpiperidinyloxy-terminated polystyrene (PS-TEMPO) using divinylbenzene (DVB) as a linking agent were performed in the presence 4-vinylbenzyl glucoside peracetate (1a) and maltohexaoside (1b). To prepare core-glycoconjugated star-shaped polymers with various amphiphilic properties, molar ratio 1 DVB feed (F1, [1]/[DVB]) was changed from 0.13 to 0.38 for coupling reaction. Star-shaped polystyrenes having 1a 1b units their cores (2a 2b, respectively)...

Abstract N ‐Hydroxyethylacrylamide (HEAA) was polymerized using the atom transfer radical polymerization (ATRP) with ethyl 2‐chloropropionate (ECP), copper(I) chloride (CuCl), and tris[2‐(dimethylamino)ethyl]amine (Me 6 TREN) in ethanol/water, producing poly( ‐hydroxyethylacrylamide) (PHEAA) well‐defined molecular weights. The thermogravimetric analysis (TGA) indicated that obtained PHEAA broadly decomposed a two‐stage weight loss. first loss due to decomposition of hydroxyethyl groups,...

Surface modifier-free hybridization of ZrO2 nanoparticles (NPs) with epoxy-based polymers is demonstrated for the first time to afford highly transparent and refractive bulk materials. This achieved by a unique versatile via one-pot direct phase transfer NPs from water epoxy monomers without any aggregation followed curing anhydride. Three types representative monomers, bisphenol A diglycidyl ether (BADGE), 3,4-epoxycyclohexylmethyl-3′,4′-epoxycyclohexane carboxylate (CEL),...