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相关概念视频

Chirality in Nature02:30

Chirality in Nature

13.9K
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.
13.9K
Chirality02:25

Chirality

25.3K
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...
25.3K
Prochirality02:05

Prochirality

4.0K
The concept of prochirality leads to the nomenclature of the individual faces of a molecule and plays a crucial role in the enantioselective reaction. It is a concept where two or more achiral molecules react to produce chiral products. A typical process is the reaction of an achiral ketone to generate a chiral alcohol. Here, the achiral reactant reacts with an achiral reducing agent, sodium borohydride, to generate an equimolar mixture of the chiral enantiomers of the product. For example, an...
4.0K
Molecules with Multiple Chiral Centers02:25

Molecules with Multiple Chiral Centers

12.3K
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...
12.3K
Chirality at Nitrogen, Phosphorus, and Sulfur02:30

Chirality at Nitrogen, Phosphorus, and Sulfur

6.0K
Chirality is most prevalent in carbon-based tetrahedral compounds, but this important facet of molecular symmetry extends to sp3-hybridized nitrogen, phosphorus and sulfur centers, including trivalent molecules with lone pairs. Here, the lone pair behaves as a functional group in addition to the other three substituents to form an analogous tetrahedral center that can be chiral.
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
6.0K
Regioselectivity and Stereochemistry of Acid-Catalyzed Hydration02:34

Regioselectivity and Stereochemistry of Acid-Catalyzed Hydration

8.6K
The rate of acid-catalyzed hydration of alkenes depends on the alkene's structure, as the presence of alkyl substituents at the double bond can significantly influence the rate.
8.6K

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相关实验视频

Updated: Sep 13, 2025

A Micropatterning Assay for Measuring Cell Chirality
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A Micropatterning Assay for Measuring Cell Chirality

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奇拉性使或打破化学驱动的自组装.

Lenard Saile1,2, Kun Dai1, Mahesh D Pol1,2

  • 1Cluster of Excellence livMatS @FIT - Freiburg Center for Interactive Materials and Bioinspired Technologies, University of Freiburg, Georges-Köhler-Allee 105, 79110, Freiburg, Germany.

Angewandte Chemie (International ed. in English)
|August 1, 2025
PubMed
概括
此摘要是机器生成的。

基拉尔氨基酸酸系子控制自我组装和反应途径,仅基于它们的手性. 这种立体化学编程为编码化学网络中的性和调节它们的功能提供了新的方法.

关键词:
乙基化转化是指一个过程.氨基酸酸盐氨基酸酸盐.奇拉性是一种精神性.非平衡的自组装自动组装.酸是一种酸.

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Coulomb Explosion Imaging as a Tool to Distinguish Between Stereoisomers
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Coulomb Explosion Imaging as a Tool to Distinguish Between Stereoisomers

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Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
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Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives

Published on: February 7, 2017

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相关实验视频

Last Updated: Sep 13, 2025

A Micropatterning Assay for Measuring Cell Chirality
08:07

A Micropatterning Assay for Measuring Cell Chirality

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Coulomb Explosion Imaging as a Tool to Distinguish Between Stereoisomers
08:51

Coulomb Explosion Imaging as a Tool to Distinguish Between Stereoisomers

Published on: August 18, 2017

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Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
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Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives

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科学领域:

  • 化学生物学 化学生物学
  • 超分子化学 超分子化学
  • 生命的起源 研究 研究 研究

背景情况:

  • 性在生物学中是基本的,大自然选择同性分子用于识别,催化和自我组装.
  • 在化学驱动的反应网络中,超出生物系统之外,性作用的作用在很大程度上是未被探索的.

研究的目的:

  • 为了研究性构建块如何影响合成化学系统中的自我组装和反应途径.
  • 为了证明分子配置,而不是功能组,可以决定化学反应和超分子行为.

主要方法:

  • 合成和使用enantiopure氨基酸酸盐作为性化剂.
  • 对自我组装动态和超分子架构形成的分析.
  • 研究级联反应和立体化学控制传播.

主要成果:

  • 化氨基酸酸盐驱动自我组装和反应通路,仅由它们的配置来调节.
  • 乙纯剂从基质中产生短暂的表皮质,从而产生不同的超分子结构和动力学.
  • 性调节级联反应中的下游反应性,并选择性调节不同的反应周期.

结论:

  • 使用奇拉化剂的立体化学编程可以精确控制反应性和自我组装.
  • 这种方法提供了新的策略,用于将性编码到化学网络中并使其功能化.
  • 奇拉性作为控制复杂化学行为的基本参数.