Synthesis of thermally stable, wholly aromatic polyketones with 2,2'-dimethoxy-1,1/-binaphthyl-6,6/-diyl units through nanosized-palladium-cluster-catalyzed Suzuki-Miyaura coupling polymerization

摘要

Wholly aromatic polyketones with 2,2'-dimethoxy-1,1'-binaphthyl-6,6'-diyl units in the main chains were synthesized through Suzuki-Mjyaura coupling polymerization catalyzed by nanosized palladium clusters, which were easily prepared from Pd(OAc)_2, PPh_3, K_2CO_3, and Bu_4NOAc in 1,4-dioxane. The resulting polyketones have both high thermal stability (high T_g) and solubility in common organic solvents, such as CHCl_3 and N,N-dimethylformamide (DMF). Flexible and pale brown films were obtained bv casting from a CHCl_3 solution.