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Synthesis, characterization and nonlinear optical properties of a new two-photon photopolymerization initiator: BPYPA

机译:新型双光子光聚合引发剂BPYPA的合成,表征和非线性光学性质

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摘要

Efficient Pd-catalyzed Heck coupling methodology is employed to synthesize a new two-photon free-radical photonpolymerization initiator bis-(4-bromo-phenyl)-[4-(2-pyridin-4-yl-vinyl)-phenyl]-amine (abbreviates to BPYPA). The experimental results confirm that BPYPA is a good two-photon absorbing chromophore and operative two-photon photopolymerization initiator. The calculated two-photon absorption cross-section of BPYPA is 28.4 x 10~(-50) cm~4 s photon~(-1). A microstructure using BPYPA as initiator has been fabricated under irradiation of 200 fs, 76 MHz Ti:sapphire femtosecond laser at 760 nm. The possible mechanism of photopolymerization is discussed.
机译:高效的Pd催化Heck偶联方法用于合成新的双光子自由基光聚合引发剂双-(4-溴-苯基)-[4-(2-吡啶-4--4-基-乙烯基)-苯基]-胺(缩写为BPYPA)。实验结果证实,BPYPA是良好的双光子吸收生色团和可操作的双光子光聚合引发剂。计算得到的BPYPA的双光子吸收截面为28.4×10〜(-50)cm〜4 s光子〜(-1)。在760 nm的200 fs,76 MHz Ti:蓝宝石飞秒激光的照射下,已经制造了使用BPYPA作为引发剂的微结构。讨论了光聚合的可能机理。

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