Author/Authors :
Yan، نويسنده , , Yunxing and Tao، نويسنده , , Xutang and Sun، نويسنده , , Yuanhong and Xu، نويسنده , , Guibao and Wang، نويسنده , , Chuankui and Yang، نويسنده , , Jiaxiang and Zhao، نويسنده , , Xian and Wu، نويسنده , , Yongzhong and Ren، نويسنده , , Yan and Yu، نويسنده , , Xiaoqiang and Jiang، نويسنده , , Minhua، نويسنده ,
Abstract :
Efficient Pd-catalyzed Heck coupling methodology is employed to synthesize a new two-photon free-radical photonpolymerization initiator bis-(4-bromo-phenyl)-[4-(2-pyridin-4-yl-vinyl)-phenyl]-amine (abbreviates to BPYPA). The experimental results confirm that BPYPA is a good two-photon absorbing chromophore and operative two-photon photopolymerization initiator. The calculated two-photon absorption cross-section of BPYPA is 28.4 × 10−50 cm4 s photon−1. A microstructure using BPYPA as initiator has been fabricated under irradiation of 200 fs, 76 MHz Ti:sapphire femtosecond laser at 760 nm. The possible mechanism of photopolymerization is discussed.
Keywords :
Two-photon photopolymerization , microstructure , BPYPA , Synthesis , TPA , Nonlinear optical property , Initiator , Cross-section
