Light and magnetism dual-gated photoinduced electron transfer-reversible addition–fragmentation chain transfer (PET-RAFT) polymerization

Abstract

PET-RAFT polymerization can be reversibly ceased in the absence of light or under an external magnetic field with a novel raspberry-like γ-Fe2O3@CD nanocatalyst.

Mixed Polymer Brushes for “Smart” Surfaces

“…While the groundwork has been laid by a body of impressive work from previous researchers, there remains room for improvement to help pave the road for MPBs to transition into industrial application and scale-up. For example, recent developments in polymer brushes synthesis, including oxygen tolerance [60,81], metal-free polymerization [82], and external regulation [81,83,84,[174][175][176][177][178][179][180] have the potential to make MPB fabrication more user friendly than ever before. Newly described orthogonal approaches in solution will increase synthetic precision: in contrast to sequential SI-FRP/SI-RDRP, orthogonal polymerization techniques and "click" reactions do not compete for the same initiating sites and improve control over grafting ratios.…”

Dual Roles of Amino-Functionalized Silicon Quantum Dots (SiQDs) for Visible-Light-Induced Surface-Initiated PET-RAFT Polymerization on Substrates

“…9−11 Most of the recent research works focus on the photoinduced electron or energy transfer (PET) RAFT, which has been recognized to be a versatile technique under both ultraviolet (UV) 12 and visible light. 13 Considering the side effects of the UV irradiation, visible-light-induced PET-RAFT has become attractive. Many kinds of photocatalysts have been developed for PET-RAFT polymerization under visible light, including transition-metal complex photocatalysts (e.g., fac-Ir(ppy) 3 , Ru(bpy) 3 Cl 2 , ZnTPP), 14−16 organodyes (e.g., eosin Y), 17 natural chlorophyll a, 18 and semiconducting nanocrystals.…”

“…Early examples of photoinduced RAFT polymerization were based on exogenous photoinitiators, , or photosensitive RAFT agents. − Most of the recent research works focus on the photoinduced electron or energy transfer (PET) RAFT, which has been recognized to be a versatile technique under both ultraviolet (UV) and visible light . Considering the side effects of the UV irradiation, visible-light-induced PET-RAFT has become attractive.…”

Advances in Fluorescent Sensing Carbon Dots: An Account of Food Analysis

“…PET refers to an electron transferral process where an excited electron is shifted from one donor to the fluorophore, quenching the fluorescence. , A typical PET molecule usually consists of a fluorophore acceptor, receptor (donor or quencher), and spacer. Based on this mechanism, Hu et al prepared a unique raspberry-like γ-Fe 2 o 3 @CD nanocatalyst that has a proficient visible-light photocatalyst in PET-RAFT polymerization because of the oxidative quenching among the photoexcited γ-Fe2O3@CDs and RAFT agent in the PET development.…”