Department of Chemistry, University of Marburg, Hans-Meerwein-Straße 4, D-35032, Marburg, Germany.
Macromol Rapid Commun. 2023 Sep;44(17):e2300217. doi: 10.1002/marc.202300217. Epub 2023 Jun 14.
The use of light for shaping and changing matter is of high relevance in polymer and material science. Herein, a photopolymer method is presented, which comprises the combination of 3D photo-printing at 405 nm light and subsequent modification under two-photon absorption (TPA) conditions at 532 nm light, adding the fourth dimension. The TPA-triggered cycloreversion reaction of an intramolecular coumarin dimer (ICD) structure occurs within the absorbing material. The 3D-printable matrix does not show any degradation under the TPA conditions. With the presented photochemical tool of TPA processes inside absorbing 3D photo-printable matrices, new possibilities for post-printing modification, e. g. for smart materials, are added.
利用光来塑造和改变物质在聚合物和材料科学中具有重要意义。在此，提出了一种光聚合方法，该方法包括在 405nm 光下进行 3D 光打印，以及随后在 532nm 光下进行双光子吸收（TPA）条件下的修饰，增加了第四个维度。在吸收材料内部，发生了分子内香豆素二聚体（ICD）结构的 TPA 触发环重排反应。在 TPA 条件下，3D 可打印基质没有任何降解。通过在吸收性 3D 可光打印基质内进行 TPA 过程的光化学工具，为后打印修饰（例如智能材料）添加了新的可能性。
