THE ELECTRONIC STATES AND REVERSE SATURAB LE ABSORPTION OF COPPER PHTHALOCYANINE MOLECULE

The electronic structure, UV-visible spectrum, excited states molecula r dynamics and micro-mechanism of reverse saturable absorption copper phthalocyanine molecule have been studied by using ROHF-INDO / SDCI me thod associated with experiment. The conclusion is that the necessary condition of reverse saturable absorption of copper phthalocyanine is the lowest quadruple state absorption cross section must be larger tha n the ground state absorption cross section for Laser. This condition is satisfied when the wave length of incident Laser is equal 532nm for CuPc, so the character of reverse saturable absorption appears. The t heoretical analyses are consistent with experimental results.