Wavelength-selective Two-photon Phototriggers: novel monomers to the control of polymerisation and depolymerisation reactions with temporal and 3D spatial resolution (SelectTPE)

对不同波长的光具有选择性响应的笼状单体将被合成并用于获得具有颜色可调特性的聚合物系统。为了实现解笼过程的 3D 分辨率，我们将使用在双光子激发下具有光敏性的发色团。具有不同分子结构和功能状态的反应性单体和交联剂将被合成并与适当的聚合物前体混合。照射将根据所选的曝光波长独立地触发聚合和解聚过程。最终的聚合/解聚程度将由曝光剂量控制。这一原理在产生具有光可调特性的新材料中的应用将在两种不同的情况下进行测试：用于 3D 光图案化的新型抗蚀剂材料和具有可调机械特性和溶胀度的智能水凝胶。

Caged monomers with selective response to light of different wavelengths will be synthesized and used to obtain polymer systems with chromic-tunable properties. In order to achieve 3D resolution of the uncaging process, we will use chromophores with photosensitivity under two-photon excitation. Reactive monomers and crosslinkers with different molecular architectures and functional states will be synthesized and mixed with appropriate polymer precursors. Irradiation will trigger polymerisation and depolymerisation processes independently depending on the selected exposure wavelength. The final polymerisation/depolymerisation degrees will be controlled by the exposure dose. The application of this principle to the generation of new materials with phototunable properties will be tested in two different cases: novel resist materials for 3D photopatterning and smart hydrogels with tunable mechanical properties and swelling degree.