Two new symmetrical two-photon free-radical photopolymerization initiators, 1,4-bis-2-[4-(2-pyridin-4-ylvinyl)phenyl]vinyl}-2,5-bisdimethoxybenzene 6 and 1,4-bis-2-[4-(2-pyridin-4-ylvinyl)phenyl]vinyl}-2,5-bisdodecyloxybenzene 7, were synthesized using an efficient Wittig and Pd-catalyzed Heck coupling methodology. One-photon fluorescence, one-photon fluorescence quantum yields, one-photon fluorescence lifetimes, and two-photon fluorescence have been investigated. Experimental results show that both compounds were good two-photon absorbing chromophores and effective two-photon photopolymerization initiators. Two-photon polymerization microfabrication experiments have been studied and the possible photopolymerization mechanism is discussed.
采用高效的维蒂希和
钯催化赫克耦合方法合成了两种新型对称双光子自由基光聚合
引发剂,即 1,4-双-2-[4-(2-
吡啶-4-基
乙烯基)苯基]
乙烯基}-2,5-双二
甲氧基苯 6 和 1,4-双-2-[4-(2-
吡啶-4-基
乙烯基)苯基]
乙烯基}-2,5-双
十二烷氧基苯 7。对单光子荧光、单光子荧光量子产率、单光子荧光寿命和双光子荧光进行了研究。实验结果表明,这两种化合物都是良好的双光子吸收发色团和有效的双光子光聚合
引发剂。对双光子聚合微加工实验进行了研究,并讨论了可能的光聚合机制。