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合成了一个新的双光子吸收聚合引发剂 ,9 乙基 3 {2 [4 ( 2 吡啶基 4 乙烯基 ) 苯基 ] 乙烯基 } 9氢咔唑 (EPVPVC) ,用1HNMR谱、13 CNMR谱和元素分析进行了表征 .测试了紫外吸收光谱、单光子荧光光谱、单光子荧光寿命、单光子荧光量子产率和双光子荧光光谱 .量化计算结果表明 ,EPVPVC的双光子吸收截面为 5 6 6× 10 -50 cm4·s·photon-1.在 780nm的飞秒脉冲激光激发下 ,EPVPVC发出较强的上转换荧光 ,荧光峰位于 5 3 6nm .用EPVPVC做引发剂 ,加入丙烯酸酯型齐聚物(CN12 0C80 ) ,在脉冲宽度为 2 0 0fs ,重复频率为 76MHz ,中心波长为 780nm飞秒脉冲激光下 ,制作了一个三维周期性微结构 .在理论计算的基础上 ,定性地探讨了其可能的聚合机理
A new two-photon absorption polymerization initiator was synthesized, which was characterized by 1HNMR, 13CNMR and Elemental analysis.The UV absorption spectra, single-photon fluorescence spectra, single-photon fluorescence lifetime, single-photon fluorescence quantum yield and two-photon fluorescence spectra were measured.The quantitative calculation results show that the two-photon absorption cross section of EPVPVC is 566 × 10 -50 cm4 · s · photon-1. At 780 nm femtosecond pulse laser excitation, EPVPVC emits strong up-conversion fluorescence with a fluorescence peak at 536 nm. Using EPVPVC as an initiator, acrylate-type oligomers (CN12 0C80), a three-dimensional periodic microstructure was fabricated with a pulse width of 200fs, a repetition frequency of 76MHz and a center wavelength of 780nm femtosecond pulse laser.On the basis of theoretical calculation, it was probed into its possible Polymerization mechanism