We report an approach for the photomediated post-fabrication modification of reactive, azlactone-containing gels using light-initiated deprotection of amines caged with 2-(nitrophenyl)propyloxycarbonyl (NPPOC). Photomediated modification of these gels can be used to generate a gradient in chemical functionality. When functionalized with tertiary amine groups, these gradient gels exhibit rapid and reversible shape deformations in response to changes in pH.

中文翻译：

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苯并内酯官能化凝胶的光介制造后修饰，用于开发水凝胶致动器。

我们报告了一种方法，使用光引发的脱除2-（硝基苯基）丙氧基羰基（NPPOC）的胺的脱保护，对反应性，含氮杂内酯的凝胶进行光介法后修饰修饰。这些凝胶的光介导修饰可用于产生化学官能度的梯度。当用叔胺基官能化时，这些梯度凝胶会响应pH值的变化而呈现出快速且可逆的形状变形。