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螺旋组件的紫外线光诱导的形态转变,从不规则的板状结构变成纳米球

Zhen Wu¹, Leping Xiao¹, Ruoyu Xu¹

¹School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China.

Langmuir : the ACS journal of surfaces and colloids

|September 22, 2023

概括

这项研究介绍了一种光响应的螺旋衍生物 (SP),它可以自组装成片,并在紫外线下转化为纳米球. 这种形态变化是由异构化和改变的分子间力驱动的,为智能材料提供了潜力.

科学领域:

材料科学材料科学材料科学
超分子化学超分子化学
摄影化学的使用.

背景情况:

可控制的自我组装对于理解分子过程至关重要.
光响应材料提供了对结构和功能的动态控制.

研究的目的:

构建和研究具有光响应自组合特性的螺旋衍生物 (SP).
在SP组件中阐明光诱导形态转换背后的机制.

主要方法:

一种螺旋衍生物 (SP) 的合成.
使用光谱学 (UV-vis) 对自组装结构的表征.
理论计算以了解分子间力量和聚合行为.

主要成果:

SP自组装成板状结构,在紫外线下转化为纳米球.
紫外线光谱学证实56%的异构化从闭环 (SPC) 到开环 (SPO) 形式,与颜色的变化.
理论计算显示SPO-SPO聚合物中更强的范德瓦尔斯力,推动稳定的中间形成.

结论:

从SPC到SPO的SP异构化以及分子间相互作用的差异是形态转变的关键.
这项工作提出了一个有效的策略来调节自组装形态.
这些发现对智能材料的应用具有重大前景.

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