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相关概念视频

Indirect Motor Pathways01:22

Indirect Motor Pathways

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The indirect motor or extrapyramidal pathways originate in the brainstem, the lower portion of the brain that connects it to the spinal cord. They consist of several distinct tracts, each with specialized functions. The four main tracts of the indirect motor pathways are the vestibulospinal tract, the reticulospinal tract, the tectospinal tract, and the rubrospinal tract.
The vestibulospinal tract originates in the vestibular nuclei of the brainstem. The vestibular system detects changes in...
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Direct Motor Pathways01:11

Direct Motor Pathways

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The direct motor pathways, also known as the pyramidal tracts, are a group of neural pathways that originate in the brain and descend through the spinal cord. They control the voluntary movement of the body. There are two major direct motor pathways: the corticospinal and the corticobulbar tracts.
The corticospinal tract is responsible for the voluntary movement of the limbs and trunk. It originates in the cerebral cortex of the brain and descends through the cerebrum's internal capsule and...
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可切换DTE@MOF混合动力中的结构功能相关性:跟踪局部动力学和疲劳路径

Markus Rödl1, Eva Neuner1, Armin Penz1

  • 1Institute of General, Inorganic and Theoretical Chemistry, Universität Innsbruck, Innrain 80-82, Innsbruck 6020, Austria.

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概括

研究金属有机框架 (MOF) 中的可光切换分子,揭示了它们的运动如何影响光引起的变化. 在MOF毛孔中的纳米封闭影响光色反应和耐疲劳性.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 化学 化学 化学
  • 纳米技术纳米技术

背景情况:

  • 了解多孔材料中的可光切换分子对于先进的光学应用至关重要.
  • 在金属有机框架 (MOF) 中客分子的高流动性使其光学特性和光色行为的研究变得复杂.
  • 染料-MOF相互作用显著影响光色反应和耐疲劳性.

研究的目的:

  • 为了研究UiO-67金属有机框架内的dithienylethene染色体的光诱导异构化.
  • 阐明结构重组和宿主-客人相互作用对光色特性和耐疲劳性的影响.
  • 为在MOF中提供不同染色体适配体稳定性的原子层次理解.

主要方法:

  • 固态核磁共振 (ssNMR) 光谱学用于描述客分子嵌入和物理状态.
  • 进行X射线衍射实验,分析MOF和客分子的结构变化.
  • 扩散反射光谱法用于监测光色反应和疲劳.
  • 在半经验量子化学层面进行分子动力学 (MD) 模拟,以了解宿主-客人相互作用.

主要成果:

  • 固态核磁共振和X射线衍射证实了UIO-67内的可光切换染料的嵌入和物理状态.
  • 扩散反射光谱表示由于MOF孔内的纳米封闭效应导致轻微疲劳.
  • 染色体的开放,光不活性形式优先占据MOF侧孔,导致光交换疲劳.
  • 模拟MD显示了特定的主机-客户互动和稳定紧的光无活体对应器.

结论:

  • 该研究提供了对MOF内可光切换分子行为的全面了解,结合了实验和计算方法.
  • 纳米封闭效应和不同染色体形式的特定孔隙占用是影响MOF光色性能和疲劳的关键因素.
  • 这项研究提供了基于MOF染料系统设计强大的光响应材料的见解.