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相关概念视频

Chirality in Nature02:30

Chirality in Nature

16.5K
Chirality is the most intriguing yet essential facet of nature, governing life’s biochemical processes and precision. It can be observed from a snail shell pattern in a macroscopic world to an amino acid, the minutest building block of life. Most of the snails around the world have right-coiled shells because of the intrinsic chirality in their genes. All the amino acids present in the human body exist in an enantiomerically pure state, except for glycine - the sole achiral amino acid.
16.5K
Chirality02:25

Chirality

28.9K
Chirality is a term that describes the lack of mirror symmetry in an object. In other words, chiral objects cannot be superposed on their mirror images. For example, our feet are chiral, as the mirror image of the left foot, the right foot, cannot be superposed on the left foot.
Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...
28.9K
Molecular Geometry and Dipole Moments02:36

Molecular Geometry and Dipole Moments

17.7K
The VSEPR theory can be used to determine the electron pair geometries and molecular structures as follows:
17.7K
Fischer Projections02:18

Fischer Projections

16.1K
Learning to draw Fischer projections of molecules and understanding their relevance plays a crucial role in the visual depiction of organic molecules. A Fischer projection is a two-dimensional projection on a planar surface to simplify the three-dimensional wedge–dash representation of molecules. This is especially helpful in the case of molecules with multiple chiral centers that can be difficult to draw. Here, all the bonds of interest are represented as horizontal or vertical lines. While...
16.1K
Molecules with Multiple Chiral Centers02:25

Molecules with Multiple Chiral Centers

14.7K
Molecules that possess multiple chiral centers can afford a large number of stereoisomers. For instance, while some molecules like 2-butanol have one chiral center, defined as a tetrahedral carbon atom with four different substituents attached, several molecules like butane-2,3-diol have multiple chiral centers. A simple formula to predict the number of stereoisomers possible for a molecule with n chiral centers is 2n. However, there can be a lower number where some of the stereoisomers are...
14.7K
¹H NMR of Conformationally Flexible Molecules: Temporal Resolution00:52

¹H NMR of Conformationally Flexible Molecules: Temporal Resolution

1.2K
At room temperature, the chair conformer of cyclohexane undergoes rapid ring flipping between two equivalent chair conformers at a rate of approximately 105 times per second. These two chair conformers are in equilibrium. The rapid ring flipping results in the interconversion of the axial proton to an equatorial proton and an equatorial to the axial proton. Such interconversions are too rapid and cannot be detected on the NMR timescale. Hence, the NMR spectrometer cannot distinguish between the...
1.2K

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相关实验视频

Updated: Jan 8, 2026

Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex
10:52

Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex

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在三维奇拉流体中,贝尔二次数动态.

Michalis Chatzittofi1,2, Yuto Hosaka1

  • 1Max Planck Institute for Dynamics and Self-Organization, (MPI-DS), Am Fassberg 17, 37077 Göttingen, Germany.

Physical review. E
|December 23, 2025
PubMed
概括

在具有奇异粘度的奇态环境中的性诱导着子二元体中的旋转动力学. 热波动通过合形状变化和运动,进一步影响旋转扩散性.

科学领域:

  • 软物质物理学 软物质物理学
  • 化学物理 化学物理
  • 材料科学 材料科学 材料科学

背景情况:

  • 具有保守平价对称性的经典系统通常不会表现出由相互振荡产生的旋转运动.
  • 了解性环境中的新兴动态对于设计新型分子机器和材料至关重要.

研究的目的:

  • 为了研究一个子二次元的方向动态在一个有奇异粘度的三维性环境中.
  • 为了确定性和热波动如何影响二度体的旋转运动和扩散性.

主要方法:

  • 进行了分析计算,以建模二元体的行为.
  • 该研究纳入了热波动,以探索它们对旋转动力学的影响.

主要成果:

  • 发现性存在的诱导旋转动力学取决于二元体的膨胀/收缩.
  • 旋转扩散性受到形状波动和旋转运动之间的合的显著影响.

结论:

  • 这项研究提供了对平价对称性被打破的系统的见解,特别是在奇异粘性流体中.
  • 这些发现可以作为研究复杂系统中的集体行为的基础,例如多元件分子机器和带电聚合物.

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Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
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Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures
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Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures

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相关实验视频

Last Updated: Jan 8, 2026

Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex
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Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex

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Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
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Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates

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Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures
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Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures

Published on: May 20, 2014

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