Recommanded Product: 19481-82-4. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: 2-Bromopropanenitrile, is researched, Molecular C3H4BrN, CAS is 19481-82-4, about Visible-light-induced living radical polymerization using in situ bromine-iodine transformation as an internal boost. Author is Liu, Xiaodong; Xu, Qinghua; Zhang, Lifen; Cheng, Zhenping; Zhu, Xiulin.
A facile and effective visible-light-induced living radical polymerization (LRP) system was successfully developed at room temperature using typical alkyl bromides (such as Et α-bromophenylacetate (EBPA) and 2-bromopropanenitrile (BPN)) as the initiator in the presence of sodium iodide (NaI) for the first time. Water-soluble poly(ethylene glycol) Me ether methacrylate (PEGMA) was used as the model monomer. By investigating the influencing factors including initiator and solvent type, solvent volume, light source, activator (sodium iodide) and catalyst (triethylamine) concentration, and d.p. (DP), optimized polymerization conditions could be established. Excellent control over mol. weights and distributions (Mw/Mn = 1.05-1.33) of the polymers was achieved under light-emitting diode (LED) irradiation In addition, the moderate polymerization rate could be drastically promoted in the presence of triethylamine (TEA) as the catalyst. This polymerization system exhibited instantaneous control in response to the on-off switch of the irradiation stimulus. Various types of other monomers (such as Me methacrylate (MMA) and glycidyl methacrylate (GMA)) and illumination sources (especially sunlight) also proved to be compatible with this LRP system. The possible polymerization mechanism was investigated, and the bromine-iodine transformation activated LRP in this study will enable the facile preparation of well-defined materials with satisfactory controllability and versatile architectures.
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