Two new two-photon photopolymerization initiators, diphenyl-(4-2-[4-(2-pyridin-4-ylvinyl)phenyl]vinyl}phenyl)amine 3 and 9-(4-2-[4-(2-pyridin-4-ylvinyl)phenyl]vinyl}phenyl)-9H-carbazole 4, have been synthesized and their crystal structures have been determined. One-photon fluorescence, one-photon fluorescence quantum yields, one-photon fluorescence lifetimes, and two-photon fluorescence have been investigated. The results show that they are good two-photon absorbing chromophores and effective two-photon photopolymerization initiators. The calculated two-photon absorption cross sections of molecules 3 and 4 for the lowest excited state are 59.3 × 10−50 and 43.0 × 10−50 cm4 s photon−1, respectively. Two-photon initiating polymerization microfabrication experiments have been studied and the possible photopolymerization mechanisms have been discussed.
合成了两种新型的双光子光聚合
引发剂,二苯基-(4-2-[4-(2-
吡啶-4-
乙烯基)苯基]
乙烯}苯基)胺3和9-(4-2-[4-(2-
吡啶-4-
乙烯基)苯基]
乙烯}苯基)-9H-
咔唑4,并确定了它们的晶体结构。研究了单光子荧光、单光子荧光量子产率、单光子荧光寿命和双光子荧光。结果表明,它们是良好的双光子吸收色素和有效的双光子光聚合
引发剂。分子3和4在最低激发态下的计算双光子吸收截面分别为59.3 × 10−50和43.0 × 10−50 cm4 s photon−1。研究了双光子引发的聚合微加工实验,并讨论了可能的光聚合机制。