π-Conjugated stannole copolymers synthesised by a tin-selective Stille cross-coupling reaction.

ABSTRACT: The synthesis of four well-defined conjugated polymers TStTT1-4 containing unusual heterocycle units in the main chain, namely stannole units as building blocks, is reported. The stannole-thiophenyl copolymers were generated by tin-selective Stille coupling reactions in nearly quantitative yields of 94% to 98%. NMR data show that the tin atoms in the rings remain unaffected. Weight-average molecular weights (M _w) were high (4900-10 900 Da and 9600-21 900 Da); and molecular weight distributions (M _w/M _n) were between 1.9 and 2.3. The new materials are strongly absorbing and appear blue-black to purple-black. All iodothiophenyl-stannole monomers St1-4 and the resulting bisthiophenyl-stannole copolymers TStTT1-4 were i

SUBMITTER: Ramirez Y Medina IM 

PROVIDER: S-EPMC8142672 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature