Abstract: The present invention relates to a kind of synthesis and luminescent characteristic of novel phosphorus containing light-emitting polymers, especially one improving the luminescence efficiency of the synthesis light-emitting polymers. According to the method of the present invention, the electron-transporting chromophores are introduced into an emission polymer to increase its electron affinity. Further, several phosphorus-containing emission chromophores are synthesized and incorporated with electron-transporting chromophores finally resulting in the novel phosphorus chromophores emitting blue light as expected, improving thermal stability of resulting polymers such that the absorption peaks of these polymers are restricted to a stable range.

Abstract: The present invention relates to a random copolyester containing naphthalene ring structure, in particular to a random copolyester containing a first repeating unit which is the same as that of polyalkylene naphthalate, such as polyethylene naphthalate (PEN) and polybutylene naphthalate (PBN), and a second repeating unit which is similar to the first repeating unit except that an aryl ether linkage is incorporated thereto. The present copolyester can be prepared from a dihydroxyethoxy compound and bis(hydroxyalkyl)naphthalate via a direct melt polycondensation in the presence of a metallic catalyst.