Recent Advances in Synthesis of Non-Alternating Polyketone Generated by Copolymerization of Carbon Monoxide and Ethylene.

The copolymers of carbon monoxide (CO) and ethylene, namely aliphatic polyketones (PKs), have attracted considerable attention due to their unique property and degradation. Based on the arrangement of the ethylene and carbonyl groups in the polymer chain, PKs can be divided into perfect alternating and non-perfect alternating copolymers. Perfect alternating PKs have been previously reviewed, we herein focus on recent advances in the synthesis of PKs without a perfect alternating structure including non-perfect alternating PKs and PE with in-chain ketones.

Experimental and theoretical insights into palladium-mediated polymerization of ,-disubstituted aminostyrene.

Experimental and theoretical insights into polymerization of ,-disubstituted aminostyrene monomers (St-4-NR, R = Me, Et, Ph) using cationic α-diimine palladium complexes have been initially reported. The effects of the catalyst structure and monomer substituent were studied systematically. Polymerization turnover frequency (TOF) was shown to decrease in the order of monomer substituents Me > Et > Ph, whereas the molecular weight of the produced polymers showed an opposite trend (Me < Et < Ph).

Amphiphilic Polyethylene--poly(L-lysine) Block Copolymer: Synthesis, Self-Assembly, and Responsivity.

Polyethylene--polypeptide copolymers are biologically interesting, but studies of their synthesis and properties are very few. This paper reports synthesis and characterization of well-defined amphiphilic polyethylene--poly(L-lysine) (PE--PLL) block copolymers by combining nickel-catalyzed living ethylene polymerization with controlled ring-opening polymerization (ROP) of ε-benzyloxycarbonyl-L-lysine--carboxyanhydride (Z-Lys-NCA) and sequential post-functionalization. Amphiphilic PE--PLL block copolymers self-assembled into spherical micelles with a hydrophobic PE core in aqueous solution.

Bathochromic-Shifted Emissions by Postfunctionalization of Nonconjugated Polyketones.

Most nontraditional intrinsic luminescent (NTIL) polymers currently show blue fluorescence. Tuning the emission color of NTIL polymers is of fundamental importance for their applications, but it still remains a scientific challenge. Herein, we initially develop an efficient strategy for bathochromic shifting of NTIL polymers by through-space acceptor-donor charge transfer between the in chain and the side chain.