Abstract Visible light‐induced reverse and simultaneous normal initiation (SR&NI) atom transfer radical polymerizations of vinyl monomers are examined using various dyes type I photoinitiators. The effect photoinitiator types on the control molecular weight distribution is described. In both dye sensitized SR&NI ATRP systems, weights increase linearly with conversion. However, experimental considerably higher than theoretical values polymers show broad‐molecular‐weight distributions...

A new photoredox catalyst system for atom transfer radical polymerization is developed on the basis of visible light photocatalysis using dimanganese decacarbonyl (Mn2(CO)10) that initiates and controls at ambient temperature. The was performed by a Mn2(CO)10–alkyl halide with visible- or sunlight in presence parts per million (ppm) copper catalysts. photogenerated ˙Mn(CO)5 radicals are not only able to abstract halogen atoms from alkyl halides generate carbon centered but also reduce...

The recently developed photoinitiated atom transfer radical polymerization has been implemented in the inverse microemulsion of oligo(ethylene glycol) monomethyl ether methacrylate. Two different mechanisms including a simultaneous reverse and normal initiated ATRP combination activators generated by electron initiators for continuous activator regeneration are investigated under UV light. effects various reaction parameters on resulting particles have systematically investigated, it...

Abstract A new photoinitiating system for living cationic polymerization of vinyl ethers is reported. In the current approach, visible‐light irradiation dimanganese decacarbonyl (Mn 2 (CO) 10 ) in presence an alkyl bromide results formation carbon‐centered radicals. The photochemically generated radicals were then oxidized by diphenyliodonium ions to corresponding cations. These cations can add ether monomers, which are rapidly deactivated anions give α‐halide functional end groups....

Visible light induced self-condensing vinyl polymerization is explored using 2-bromoethyl methacrylate (2-BEMA) and methyl (MMA) as inimer comonomer, respectively, in the presence of dimanganese decacarbonyl (Mn2(CO)10) for preparation hyperbranched polymers. Upon photoexcitation visible range, Mn2(CO)10 undergoes irreversible decomposition leading to formation initiating radicals through bromine abstraction from 2-BEMA. Depending on concentrations 2-BEMA irradiation time, polymers with...

Polyethylene-graft-poly(tert-butylacrylate) (PE-g-PtBA) copolymers were prepared by using a combination of ring-opening metathesis polymerization (ROMP), hydrobromination, and visible light-induced free radical polymerization. First, cis-cyclooctene was polymerized via ROMP in the presence chain transfer agent quantitatively hydrobrominated. Poly(tert-butyl acrylate) (PtBA) chains then grown grafting from approach Br-substituted linear poly(ethylene) (PE) backbone dimanganese decacarbonyl...

A robust drug delivery system based on nanosized amphiphilic star-hyperbranched block copolymer, namely, poly(methyl methacrylate-block-poly(hydroxylethyl methacrylate) (PMMA-b-PHEMA) is described. PMMA-b-PHEMA was prepared by sequential visible light induced self-condensing vinyl polymerization (SCVP) and conventional polymerization. All of the synthesis characterization details conjugates are reported. To accomplish tumor cell targeting property, initially cell-targeting...

Lightly branched, hyperbranched and cross-linked polymers with clickable sites were synthesized via a modified version of self-condensing photoinitiated copolymerization methyl acrylate (MA) propargyl (PA). The method is based on the use PA monomer containing two polymerizable groups, namely groups different reactivities in free radical MA.

Abstract The environmentally friendly Mn 2 ( CO ) 10 ‐based visible light photoinitiating system is a powerful method for the preparation of linear and crosslinked polymeric structures. From practical point view, most important feature this initiating its optical characteristics in range with high quantum yield good solubility properties. This applicable variety monomers that can be polymerized via either radical or cationic mechanisms. Various complex macromolecular structures such as...

Type II photoinitiated self-condensing vinyl polymerization for the preparation of hyperbranched polymers is explored using 2-hydroxyethyl methacrylate (HEMA) or 2-(dimethylamino)ethyl (DMAEMA), and methyl as hydrogen donating inimers comonomer, respectively, in presence benzophenone camphorquinone under UV visible light. Upon irradiation at corresponding wavelength, excited photoinitiator abstracts from HEMA DMAEMA leading to formation initiating radicals. Depending on concentration...

Two amphiphilic star-hyperbranched copolymers with different hydrophilic PHEMA segments were synthesized, and their drug loading/release profiles examined by using Paclitaxel.

Branched polymers with different branching densities and their cross‐linked analogues are synthesized by photoinduced self‐condensing vinyl polymerization via benzodioxinone photochemistry. Thus, methyl methacrylate is copolymerized two comonomers, namely, 2‐hydroxyethyl (HEMA) 2‐(dimethylamino)ethyl in the presence of bisbenzodioxinone (BBNZ) under UV light. Upon irradiation, BBNZ undergoes irreversible decomposition leading to formation benzophenone photosensitizer bisketene. The released...

A novel polymerization mechanism transformation strategy, combining ring-opening metathesis (ROMP) and visible light induced cationic polymerization, is successfully applied for the synthesis of polyethylene-graft-poly(cyclohexene oxide) (PE-g-PCHO). First, cis-cyclooctene (COE) was polymerized via ROMP in presence a chain transfer agent quantitatively hydrobrominated to give bromo functional polyethylene (PE-Br). Subsequent irradiation PE-Br range using dimanganese decacarbonyl (Mn2(CO)10)...

Iodo functionalized polyethylene (PE‐I), prepared by the addition of iodine after catalyzed poly­ethylene chain growth on magnesium, is demonstrated to be an efficient macroinitiator for thermally induced, controlled free radical polymerization using dimanganese decacarbonyl (Mn 2 (CO) 10 ). The methyl methacrylate initiated thermal homolysis ) at 80 °C, forming reactive manganese pentacarbonyl species [•Mn(CO) 5 ] capable activating C−I bond PE‐I. metal generation and degenerative processes...

Linear poly(hydroxyethyl methacrylate-co-methyl methacrylate) P(HEMA-co-MMA) and poly(dimehylaminoethyl P(DMAEMA-co-MMA) their corresponding hyperbranched copolymers were synthesized by conventional photoinitiated free radical polymerization self-condensing vinyl (SCVP) using Type I II photoinitiators, respectively. Then, the polymers processed electrospraying in N, N-dimethylformamide. The surface of resulting electrospray coatings was examined SEM, XPS, WCA then compared with those...

The synthesis of polyethylene-graft-polystyrene copolymers by a multistep "grafting from" approach is described. In the first step, bromo-functional polyethylene (PE-Br) was synthesized via ring-opening metathesis polymerization (ROMP) cis-cyclooctene (COE) and quantitative hydrobromination. Subsequent irradiation PE-Br under visible light in presence dimanganese decacarbonyl (Mn2(CO)10) 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) resulted formation TEMPO-substituted (PE-TEMPO). Polystyrene...

Abstract A new photoinitiating system for living cationic polymerization of vinyl ethers is reported. In the current approach, visible‐light irradiation dimanganese decacarbonyl (Mn 2 (CO) 10 ) in presence an alkyl bromide results formation carbon‐centered radicals. The photochemically generated radicals were then oxidized by diphenyliodonium ions to corresponding cations. These cations can add ether monomers, which are rapidly deactivated anions give α‐halide functional end groups....

Abstract During the last decade, progress has been made in on‐site detection of abused drug use. Herein, we present an electrochemical biosensor for one synthetic cannabinoids (SCs), JWH‐073, using poly (methyl methacrylate) (PMMA) hyperbranched copolymer (HBC) as a base coating and antibody molecules to bind JWH‐073 surface. Modification surface is proved with various techniques such differential pulse voltammetry, cyclic impedance spectrometry. The limit linearity (in logarithmic scale)...