PREPARATION AND PROPERTIES OF SOLUBLE POLYPHENYLENES

Diheptylbenzene-1,4-bis(trimethylene boronate) was copolymerized with arylene dibromides in the presence of a palladium catalyst. Copolymers with 2,5-thienylene or 1,4-naphthylene had degree of polymerization h igher than 100. Structures of the copolymers were identified by NMR sp ectroscopy. The copolymers emitted strong fluorescence. Spectra of cop olymer with anthracene showed fine structures and a Stokes shift as sm all as 13 nm, while those of copolymers with thiophene or naphthalene were structureless and showed large apparent Stokes shift ranging from 70 to 130 nm.