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相关概念视频

Photochemical Electrocyclic Reactions: Stereochemistry01:26

Photochemical Electrocyclic Reactions: Stereochemistry

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The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
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Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

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Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
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相关实验视频

Updated: Mar 12, 2026

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals
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Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals

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光响应化学系统,使多层次的结构排序成为可能.

Jianshuo Cheng1, Mouwei Liu1, Liangliang Zhu1

  • 1State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China. zhuliangliang@fudan.edu.cn.

Chemical Society reviews
|March 11, 2026
PubMed
概括

光能动态控制多尺度材料结构以获得先进的光电子特性. 这篇评论探讨了光响应系统,这些系统使用光来构建和操纵从分子转换的有序架构.

科学领域:

  • 材料科学 材料科学 材料科学
  • 化学 化学 化学
  • 物理 物理学 物理

背景情况:

  • 有序的多尺度架构显著影响材料功能,特别是光电子特性.
  • 由于其时空分辨率和非侵入性,光可以精确控制动态结构排序.
  • 现有的审查往往忽视了光在管理多层次结构秩序中的作用.

研究的目的:

  • 为实现和控制多尺度结构排序,全面调查光响应化学系统.
  • 要突出如何使用光来动态构建和操纵有序的材料架构.
  • 弥合了解光对多尺度结构秩序的影响的差距.

主要方法:

  • 阐明触发分子转变的基本光化学和光物理机制.
  • 对构建层次架构的光介导策略进行批判性检查.
  • 讨论分子事件的实时,现场翻译成宏观的有序状态.

主要成果:

  • 确定了关键的光介导策略,包括聚合诱导的自我组装,液晶辅助的相结构放大,通过主机-客户互动的光诱导的自我组装和光刺激诱导的组装 (PEIA).
  • 演示了分子或纳米级事件如何转化为明确的,宏观的有序状态.
  • 提供了对光在多尺度结构组织中的作用的基本理解.

更多相关视频

Patterning via Optical Saturable Transitions - Fabrication and Characterization
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Patterning via Optical Saturable Transitions - Fabrication and Characterization

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A 'Plug and Play' Method to Create Water-dispersible Nanoassemblies Containing an Amphiphilic Polymer, Organic Dyes and Upconverting Nanoparticles
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A 'Plug and Play' Method to Create Water-dispersible Nanoassemblies Containing an Amphiphilic Polymer, Organic Dyes and Upconverting Nanoparticles

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相关实验视频

Last Updated: Mar 12, 2026

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals
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Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals

Published on: May 29, 2018

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Patterning via Optical Saturable Transitions - Fabrication and Characterization
08:19

Patterning via Optical Saturable Transitions - Fabrication and Characterization

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A 'Plug and Play' Method to Create Water-dispersible Nanoassemblies Containing an Amphiphilic Polymer, Organic Dyes and Upconverting Nanoparticles

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结论:

  • 光响应系统为控制材料结构和功能提供了强大的工具.
  • 光介导策略可以精确设计多尺度架构,以定制光电子属性.
  • 未来的研究应该解决挑战,并探索光控制材料组装的新方向.