Preparation of Cobaltocenium-Labeled Polymers by Atom Transfer Radical Polymerization

Abstract

Cobaltocenium-labeled polymers were prepared by atom transfer radical polymerization (ATRP) using cobaltocenium-containing α-haloesters as initiators. The locations of the cobaltocenium moiety in the polymer chains (either at the end or in the middle) were dictated by the chemical structures of initiators. Kinetic studies showed that polymerizations of styrene, tert-butyl acrylate, and methyl methacrylate monomers followed a controlled/living manner, except that polymerization of methyl methacrylate with the aid of cobaltocenium monoinitiator displayed significant termination. All resultant polymers were redox-active and exhibited characteristic UV−vis absorption from the cobaltocenium moiety.

Side-Chain Cobaltocenium-Containing Polymers: Controlled Polymerization and Applications

“…Kinetic studies showed that most polymerizations followed a controlled/"living" manner, except that polymerization of methyl methacrylate with displayed significant termination (37).…”

Synthesis of 4-Arm Polystyrene Star Polymers by Sequential Reactions

“…HEBIB was synthesized following reported procedures (14). 10.8 ml (20.1 g, 87.4 mmol) 2-bromoisobutyryl bromide were added dropwise to a cooled (0°C) mixture of 80 mL (88.8 g, 1.44 mol) ethylene glycol and 12 mL (8.76 g, 86.6 mmol) triethylamine over 30 minutes.…”

Porous Carbons – Hyperbranched Polymers – Polymer Solvation

“…Baek and Harris prepared AB 2 (1-38, Scheme 13) and A 2 B (1-39, Scheme 13) monomers [179] and self-polymerized them to very high molecular weight hb poly (phenylquinoxaline)s (hb-PPQs). The phenol-terminated hb-PPQs were only soluble in strong organic acids, whereas the aryl fluoride-terminated hb-PPQs were soluble in most common organic solvents.…”

“…Baek and Harris also synthesized AB (1-40, Scheme 13) and BA (1-41, Scheme 13) monomers [180] in addition to the previously synthesized AB 2 and A 2 B monomers [179]. The AB and AB 2 monomers were copolymerized to afford different degrees of linear units in hydroxyl-terminated hb-PPQs.…”