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Facile Strategy to Well-Defined Water-Soluble Boronic Acid (Co)polymers

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journal contribution
posted on 29.08.2007, 00:00 by Jennifer N. Cambre, Debashish Roy, Sudershan R. Gondi, Brent S. Sumerlin
A facile route to well-defined boronic acid (co)polymers from stable and easily manipulated boronic ester monomers is presented. The polymerization of 4-pinacolatoborylstyrene by reversible addition−fragmentation chain transfer (RAFT) yielded polymeric boronic acid precursors. Selection of stoichiometry allowed tuning of polymerization kinetics and targeting specific molecular weights in the range of Mn = 17000−32000 g/mol. The resulting low polydispersity poly(4-pinacolatoborylstyrene) homopolymers were employed as macro-chain transfer agents for block copolymerization with N,N-dimethylacrylamide to yield amphiphilic block copolymers that formed micelles in aqueous media. The pinacol ester derivatized (co)polymers were easily deprotected by a mild and convenient strategy to yield free boronic acid polymers