Steric Hindrance Drives the Boron-Initiated Polymerization of Dienyltriphenylarsonium Ylides to Photoluminescent C5-Polymers.

ABSTRACT: A series of alkyl-subsituted dienyltriphenylarsonium ylides were synthesized and used as monomers in borane-initiated polymerization to obtain practically pure C5-polymers (main-chain grows by five carbon atoms at a time). The impact of triethylborane (Et₃ B), tributylborane (Bu₃ B), tri-sec-butylborane (s-Bu₃ B), and triphenylborane (Ph₃ B) initiators on C5 polymerization was studied. Based on NMR and SEC results, we have shown that all synthesized polymers have C5 units with a unique unsaturated backbone where two conjugated double bonds are separated by one methylene. The synthesized C5-polymers possess predictable molecular weights and narrow molecular weight distributions (M_n,NMR =2.8 -11.9 kg mol^-1 , Ð=1.04-1.24). It h

SUBMITTER: Wang X 

PROVIDER: S-EPMC8518972 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature