Synthesis and Nonlinear Optical Properties of a New A-π-A Two-Photon Compound Utilizing Dibenzothiophene as Center

• 来源期刊: 中国化学（英文版）
• 年，卷（期）: 2007,（12）
• 页码范围: 1883-1886
• 页数: 4页
• 语种: 英文

摘要

A new two-photon material,3E,6E-bis(2-pyrid-4'-ylvinyl)dibenzothiophene (BPVDBT),has been firstly syn0thesized by an efficient Pd-catalyzed Heck coupling route.The single- and two-photon fluorescence,quantum yields,lifetimes,solvent effects of the chromophore were studied in detail and the compound exhibited solvent-sensitivity.The fluorescence intensity (Iout) and input excitation intensity (Iin) can fit in well with the quadratic parabolas,which indicates that the up-converted fluorescence was induced by the two-photon absorption (TPA).TPA cross-section of BPVDBT has been measured using the two-photon-induced fluorescence method,whose value is 14.24×10-50 cm4·s·photon-1 ·molecule-1 at 750 nm.The experimental results confirm that BPVDBT is a good two-photon absorbing chromophore with an A-π-A type.