Structures and nonlinear optical properties of new symmetrical two-photon photopolymerization initiators
作者:Yun-Xing Yan、Xu-Tang Tao、Yuan-Hong Sun、Chuan-Kui Wang、Gui-Bao Xu、Wen-Tao Yu、Hua-Ping Zhao、Jia-Xiang Yang、Xiao-Qiang Yu、Yong-Zhong Wu、Xian Zhao、Min-Hua Jiang
DOI:10.1039/b415354e
日期:——
Four new symmetrical, two-photon photopolymerization initiators, 9-(4-(1E,11E)-4-[(E)-4-(9H-carbazol-9-yl)styryl]-2,5-dimethoxystyryl}phenyl)-9H-carbazole (1), N-(4-(1E,8E)-4-[(E)-4-(diphenylamino)styryl]-2,5-dimethoxystyryl}phenyl)-N-phenylbenzeneamine (2), 1,4-bis2-[4-(2-pyridin-4-ylvinyl)phenyl]vinyl}-2,5-bisdimethoxybenzene (3) and 1,4-bis2-[4-(2-pyridin-4-ylvinyl)phenyl]vinyl}-2,5-bisdodecyloxybenzene (4), have been synthesized and characterized. 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 all good two-photon absorbing chromophores and effective two-photon photopolymerization initiators. The two-photon absorption cross-sections of these molecules have been evaluated by theoretical calculations. Microfabrication via two-photon-initiated polymerization has been studied and the possible photopolymerization mechanism is discussed.
四种新型对称双光子光聚合引发剂:9-(4-(1E,11E)-4-[(E)-4-(9H-咔唑-9-基)苯乙烯基]-2,5-二甲氧基苯乙烯基}苯基)-9H-咔唑 (1)、N-(4-(1E,8E)-4-[(E)-4-(二苯基氨基)苯乙烯基]-2、5-二甲氧基苯乙烯基}苯基)-N-苯基苯胺 (2)、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 (3) 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 (4) 的合成和表征。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。这些分子的双光子吸收截面已通过理论计算进行了评估。研究了通过双光子引发的聚合作用进行微加工的问题,并讨论了可能的光聚合机制。