Wang, Wenqi; Zhou, Zefeng; Sathe, Devavrat; Tang, Xuanting; Moran, Stephanie; Jin, Jing; Haeffner, Fredrik; Wang, Junpeng; Niu, Jia published the artcile< Degradable Vinyl Random Copolymers via Photocontrolled Radical Ring-Opening Cascade Copolymerization>, Formula: C33H21F3IrN3, the main research area is vinyl random copolymer photocontrolled radical ring opening cascade copolymerization; Cascade polymerization; Degradable polymer; Photocontrolled polymerization; Random copolymer; Reaction mechanism.
Degradable vinyl polymers by radical ring-opening polymerization are promising solutions to the challenges caused by non-degradable vinyl plastics. However, achieving even distributions of labile functional groups in the backbone of degradable vinyl polymers remains challenging. Herein, we report a photocatalytic approach to degradable vinyl random copolymers via radical ring-opening cascade copolymerization (rROCCP). The rROCCP of macrocyclic allylic sulfones and acrylates or acrylamides mediated by visible light at ambient temperature achieved near-unity comonomer reactivity ratios over the entire range of the feed compositions Exptl. and computational evidence revealed an unusual reversible inhibition of chain propagation by in situ generated sulfur dioxide (SO2), which was successfully overcome by reducing the solubility of SO2. This study provides a powerful approach to degradable vinyl random copolymers with comparable material properties to non-degradable vinyl polymers.
Angewandte Chemie, International Edition published new progress about Complex modulus, tan δ. 370878-69-6 belongs to class pyridine-derivatives, and the molecular formula is C33H21F3IrN3, Formula: C33H21F3IrN3.