Novel amino-terminated and anhydride-terminated hyperbranched polyimides (AMHBPI and ADHBPI) were successfully prepared by the two step method with a BB2-type aromatic triamine containing triphenylpyridine structure (TAPP) and a A2-type dianhydride

3

3

4

4-benzophenonetetracarboxylic dianhydride (BTDA) under microwave irradiaton.The chemical structure and properties of the resulting HBPIs were characterized by FTIR spectroscopy

1H\|NMR spectroscopy

XRD

TGA

solubility test

UV-Vis spectroscopy and fluorescence spectroscopy

respectively.The results showed that the resulting AM-HBPI and AD-HBPI were highly organosoluble in strong polar aprotic solvents and showed certain resistance to dilute inorganic acid corrosion.These polymers exhibited good thermal stability with the 10% weight loss temperature (Td10%) up to 573℃ and 568℃ in N2 atmosphere

respectively.Furthermore

the obtained AMHBPI and ADHBPI containing triphenylpyridine structure exhibited UV-Vis absorption bands in the region of 200~400 nm and 200~350 nm

as well as possessed strong purple and blue fluorescence

respectively.The UV-Vis absorption bands both extended to 425 nm and fluorescence intensity increased after the polymers were protonated with hydrochloric acid.As a result

these organosoluble novel hyperbranched polyimides containing triphenylpyridine structure were promising as high temperature resistant materials for organic photoluminescent

etc.

photoelectric applications.