For alternating repeat-unit sequence via living radical polymerization, ''template monomers'' were designed and polymerized, where two polymerizable alkene (vinyl) functions [e.g., methacrylate (M) and acrylate (A)] were placed side by side at the 1,8-positions on a rigid naphthalene scaffold. Even for such a divinyl monomer, highly selective intramolecular radical propagation was achieved with metalcatalyzed living radical polymerization systems, to give linear controlled polymers without crosslinking. The naphthalene template was cleaved via hydrolysis from the resultant polymer, and subsequently methylated for sequence characterization. 1 H NMR analysis demonstrated that the polymers consisted of highly alternating sequences (A-M-A: >80%), practically free from homo triad sequences (M-M-M).Scheme 1 Template systems towards sequence controlled radical polymerization with a template initiator (A) and a template monomer (B: this work).
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.