Photocontrolled Molecular Recognition for Materials Applications

材料应用的光控分子识别

• 批准号: RGPIN-2019-06627
• 负责人: Wisner, James
• 金额: $ 1.75万
• 依托单位: University of Western Ontario
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=679924
• 关键词: Photocontrolled; Molecular; Recognition; Materials; Applications

My research program is based on developing new ways to that molecules can interact reversibly with (or recognize) each other in solution and the solid state. The proposal describes the development of new molecules that change their form when specific colours (wavelengths) of visible light are used to irradiate them. The irradiation with one colour of light makes the molecules take a form where they interact strongly with each other. When attached to a connecting framework, these interactions result in a material that has the properties of a typical plastic or rubbery object/film. The irradiation of the substance with a different colour of light changes the form of the molecules so that they no longer recognize each other and do not interact strongly together. This results in a material that is either very brittle or more like a fluid depending on what type of framework was used to connect the molecules in the first place. The effect is reversible with a change in the colours of light used over many cycles and the materials can be switched back and forth over and over again between the two states. This can be further engineered to generate interesting behaviours like: plastics that heal damage to themselves upon irradiation with certain colours of light, objects or films that can be stretched and hold their stretched shape when irradiated with a particular colour of light then returned to the original shape by irradiating with a different colour, films with surfaces that stick together only when irradiated with a certain colour of light. **

我的研究计划是基于开发新的方法，使分子可以在溶液和固体状态下可逆地相互作用（或识别）。 该提案描述了新分子的发展，当使用特定颜色（波长）的可见光照射它们时，这些分子会改变它们的形式。用一种颜色的光照射，使分子形成一种彼此强烈相互作用的形式。 当连接到连接框架时，这些相互作用导致具有典型塑料或橡胶物体/膜的性质的材料。 用不同颜色的光照射物质会改变分子的形式，使它们不再相互识别，也不会发生强烈的相互作用。 这导致材料要么非常脆，要么更像流体，这取决于最初用于连接分子的框架类型。 这种效应是可逆的，在许多周期中使用的光的颜色发生变化，材料可以在两种状态之间反复切换。 这可以进一步设计以产生有趣的行为，例如：塑料在用某些颜色的光照射时会愈合自身的损伤，物体或薄膜可以在用特定颜色的光照射时拉伸并保持其拉伸形状，然后通过用不同颜色的光照射返回到原始形状，薄膜的表面只有在用特定颜色的光照射时才粘在一起。**