Synthesis, as well as linear and nonlinear fluorescence properties of 5,5'-bis(4-N-earbazolylstyryl)-2,2'-bithiophene

摘要

A new bithiophene-based organic luminescence material, named 5,5'-bis(4-N-car-bazoylstyryl)-2,2'-bithiophene (BCSBT), was synthesized. Its single-photon excited fluorescence band is located in the range of 520-530 nm, with a quantum yield of around 10%, The compound emits strong two-photon-excited fluorescence when excited by 200 fs laser pulses. The two-photon absorption cross section of BCSBT was found to be 124 x 10~(-50) cm~4 s by the two-photon-excited fluorescence method.