Polymer-based light-emitting diode employ N-vinylcarbazole(PVK) doped by dilute phosphorescent dye factris-(2-phenylpyridine) iridium[Ir(ppy)_3]as active layer was fabricated.

The ground-state structures and luminescent properties of fac-Ir(ppy)3(1) and the derivatives(2～8) through introducing a benzo ring on ppy ligand have been systematically researched,where ppy=2-phenylpyridyl.

Aiming at these two problems, this dissertation, using Gaussian program and DFT method, study two types of organic complex phosphorescent materials, benzo derivatives of tris(2-phenylpyridyl)- iridium(III) and fluoride derivatives of tris(1-phenylpyrazolyl)iridium(III), to provide a convincing theoretic foundation for the further optim

Synthesis and antitumor activities of 3-benzoyl-2H-1-benzopyran-2-one derivatives

Gel-forming properties of a novel class of chromen-2-one derivatives;