A novel acrylate monomer was synthesized by facile sequential two-step reactions and polymerized using RAFT polymerization to yield a well-defined thermo-, pH- and CO2-responsive homopolymer.

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A multi-functional polymer with aggregation-induced emission (AIE)-active salicylaldehyde azine (SA) functionality and reactive oxygen species (ROS)-responsive thioether groups is readily prepared via thiol-ene click polymerization of SA derivative diacrylate monomer, poly­(ethylene glycol) diacrylate, and 3,6-dioxa-1,8-octanedithiol. The obtained AIE-active polymer exhibited an unexpected strong emission in amide solvents compared to that in other common organic solvents that was dramatically decreased by adding a trace amount of water, suggesting that the polymer could be utilized as a water trace indicator in amide solvents. In the backbone, the PEG segments make the polymer well dispersed in water and the ROS-responsive thioether groups enable this polymer as a promising ROS scavenger, with embedded SA moieties as a fluorescent indicator for the hemolysis determination. Due to the ability of SA moieties to complex with Cu2+, this AIE polymer can also be utilized as a fluorescent sensor for selective Cu2+ detection in real-world water samples. Thus, this multi-functional polymer is anticipated to be well applied in biological and environmental applications.

A general critical challenge for nitroxide polymers being used as cathode materials is keeping the good solubility during the processing and good solvent resistance during charging and discharging. To address this issue, herein, a new photo‐crosslinkable branched nitroxide polymer is designed and synthesized via reversible addition‐fragmentation chain transfer copolymerization of 2,2,6,6‐tetramethyl‐4‐piperidyl methacrylate, cinnamoyl ethyl methacrylate, and ethylene glycol dimethacrylate, followed by oxidation using 3‐chloroperoxybenzoic acid. The as‐synthesized polymer can dissolve in ethyl alcohol with environmental‐friendly processing, and then can easily change into crosslinked polymer with highly resistance to organic electrolyte after UV irradiation. The crosslinked nitroxide polymer‐based cathode achieves remarkable cycle stability with a capacity retention of 90% over 1000 charge–discharge cycles at 10 C current rate, superior to that of the un‐crosslinked one with capacity retention of 65% over 1000 cycles.

Poly(3-formyl-4-hydroxybenzyl methacrylate) (PFHMA) was reacted sequentially with PEG-ONH2, hydrazine and S-benzoylthiohydroxylamine to yield a self-fluorescent polymeric H2S-donor.