Luminescent m-Carborane-Based π-Conjugated Polymer

A series of in-carborane-based T-conjugated polymers were successfully synthesized via Sonogashira-Hagihara polycondensation reaction. Diiodo-in-carborane monomer underwent efficient polycondensation reaction with both electron-donating and electron-accepting diyne comonomers. The wide-angle structure of in-carborane monomer allowed the preparation of polymers with high molecular weights (M-n = 26 600-36 400 g mol(-1)) and good polymerization degrees (DP = 31-56). UV-vis absorption study in dilute CHCl3 solution revealed. pi-conjugation extension of a p-phenylene-ethynylene segment by introducing in-carborane moieties into the polymer backbone. Further, the lack of C-C bond in the carborane cluster leads to polymers exhibiting intense blue emission in Solution state (Phi(F) = 0.11-0.26).