Synthesis, structure and properties of a new two-photon photopolymerization initiator
作者:Yan Ren、Xiao-Qiang Yu、Dong-Ju Zhang、Dong Wang、Ming-Liang Zhang、Gui-Bao Xu、Xian Zhao、Yu-Peng Tian、Zong-Shu Shao、Min-Hua Jiang
DOI:10.1039/b206578a
日期:2002.11.29
A new two-photon free-radical photopolymerization initiator, (E,E)-4-2-[p′-(N,N-di-n-butylamino)stilben-p-yl]vinyl}pyridine (abbreviated to DBASVP), has been synthesized. Quantum chemistry calculations showed that the new initiator possesses a large delocalized π electron system, a large change in dipole moment on transition to the excited state and a large transition moment. The calculated two-photon absorption cross-section is as high as 881.34 × 10−50 cm4 s photon−1. The single-photon and two-photon absorption and fluorescence properties in various solvents have been investigated carefully. The new initiator exhibits outstanding solvent-sensitivity, which experimentally interprets the excellent electron delocalized properties of the molecule. A microstructure has been fabricated under irradiation at 800 nm using a 200 fs, 76 MHz Ti:sapphire femtosecond laser.
合成了一种新的双光子自由基光聚合引发剂,(E,E)-4-2-[p′-(N,N-二正丁氨基)己苯-yl]乙烯}吡啶(简称为DBASVP)。量子化学计算表明,该新引发剂具有较大的离域π电子系统,激发态过渡时具有较大的偶极矩变化和较大的跃迁矩。计算得到的双光子吸收截面高达881.34 × 10−50 cm4 s photon−1。还仔细研究了在不同溶剂中单光子和双光子吸收以及荧光特性。新引发剂表现出优异的溶剂敏感性,这从实验上解释了分子优秀的电子离域特性。在800 nm波长下,使用200 fs、76 MHz的钛:蓝宝石飞秒激光进行了微结构的制造。