Huang, Zhujun; Chen, Zhe; Jiang, Yuan; Li, Ning; Yang, Shicheng; Wang, Guowei; Pan, Xiangcheng published the artcile< Metal-Free Hydrosilylation Polymerization by Merging Photoredox and Hydrogen Atom Transfer Catalysis>, Category: alcohols-buliding-blocks, the main research area is metal hydrosilylation polymerization merging photoredox hydrogen atom transfer catalysis.
Organosilicon compounds and polymers have found wide applications as synthetic building blocks and functional materials. Hydrosilylation is a common strategy toward the synthesis of organosilicon compounds and polymers. Although transition-metal-catalyzed hydrosilylation has achieved great advances, the metal-free hydrosilylation polymerization of dienes and bis(silane)s, especially the one suitable for both electron-rich and electron-deficient dienes, is largely lacking. Herein, the authors report a visible-light-driven metal-free hydrosilylation polymerization of both electron-rich and electron-deficient dienes with bis(silane)s by using the organic photocatalyst and hydrogen atom transfer (HAT) catalyst. The authors achieved the well-controlled step-growth hydrosilylation polymerizations of the electron-rich diene and bis(silane) monomer due to the selective activation of Si-H bonds by the organic photocatalyst (4CzIPN) and the thiol polarity reversal reagent (HAT 1). For the electron-deficient dienes, hydrosilylation polymerization and self-polymerization occurred simultaneously in the presence of 4CzIPN and aceclidine (HAT 2), providing the opportunity to produce linear, hyperbranched, and network polymers by rationally tuning the concentration of electron-deficient dienes and the ratio of bis(silane)s and dienes to alter the proportion of the two polymerizations A wide scope of bis(silane)s and dienes furnished polycarbosilanes with high mol. weight, excellent thermal stability, and tunable architectures.
Journal of the American Chemical Society published new progress about Branched polymers Role: PRP (Properties), SPN (Synthetic Preparation), PREP (Preparation). 627-27-0 belongs to class alcohols-buliding-blocks, and the molecular formula is C4H8O, Category: alcohols-buliding-blocks.
Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts