A novel kind of copolymer with ABA-type block structure was synthesized by anionic ring-openingpolymerization of β-butyrolactone (β-BL) in the presence of a P
A series of dendrimer-encapsulated poly(phenyleneethynylene)s 4~6 were synthesized. The light-harvesting antenna fimctions of dendrimer frameworks together with
The oxidative polymerization of aryl sulfoxides provides a novel polysulfo-nium compound, poly(methylsulfonio-1,4-phenylenethio-1,4-phenylene cation) in quantit