A Click Chemistry Strategy for the Synthesis of Efficient Photoinitiators for Two-Photon Polymerization
A Click Chemistry Strategy for the Synthesis of Efficient Photoinitiators for Two-Photon Polymerization
复制标题
点击化学合成双光子聚合高效光引发剂
DOI：
10.1002/adfm.202006108
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发表时间：
2020-09-13
影响因子：
19
通讯作者：
Moore, Jonathan C.
中科院分区：
文献类型：
--
作者：
Henning, Irene;Woodward, Adam W.;Moore, Jonathan C.
据报道，利用铜催化的叠氮化物/炔环加成反应可以获得适合双光子聚合的高效光引发剂。这种点击化学策略提供了一种模块化的光引发剂组装方法，使得关键片段能够快速变化，从而产生具有所需性能的光引发剂。为了评估通过这种方法产生的一流光引发剂的性能，开发了一种筛选方法，以能够快速确定双光子聚合过程中多种光刻胶的聚合和损伤阈值。通过显微拉曼光谱进一步评估乙烯基的消耗程度（DC）和聚合的均匀性。最后，制造了更复杂的结构，以证明使用三唑基光引发剂可以实现稳定 3D 微结构的有效双光子聚合。
It is reported that efficient photoinitiators, suitable for two-photon polymerization, can be obtained using the copper catalyzed azide/alkyne cycloaddition reaction. This click chemistry strategy provides a modular approach to the assembly of photoinitiators that enables the rapid variation of key fragments to produce photoinitiators with desirable properties. To assess the performance of the first-in-class photoinitiators generated by this approach, a screening method is developed to enable the rapid determination of polymerization and damage thresholds in numerous photoresists during two-photon polymerization. The degree of consumption of vinyl groups (DC) and homogeneity of the polymerization are further assessed by micro-Raman spectroscopy. Finally, more complex structures are fabricated to demonstrate that the efficient two-photon polymerization of stable 3D microarchitectures can be achieved using triazole-based photoinitiators.