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Related Concept Videos

Chirality02:25

Chirality

29.4K
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...
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Chirality in Nature02:30

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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.
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pH Scale02:41

pH Scale

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Hydronium and hydroxide ions are present both in pure water and in all aqueous solutions, and their concentrations are inversely proportional as determined by the ion product of water (Kw). The concentrations of these ions in a solution are often critical determinants of the solution’s properties and the chemical behaviors of its other solutes. Two different solutions can differ in their hydronium or hydroxide ion concentrations by a million, billion, or even trillion times. A common means of...
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Chirality at Nitrogen, Phosphorus, and Sulfur02:30

Chirality at Nitrogen, Phosphorus, and Sulfur

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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...
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Molecules with Multiple Chiral Centers02:25

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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...
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Scaling01:26

Scaling

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In designing and analyzing filters, resonant circuits, or circuit analysis at large, working with standard element values like 1 ohm, 1 henry, or 1 farad can be convenient before scaling these values to more realistic figures. This approach is widely utilized by not employing realistic element values in numerous examples and problems; it simplifies mastering circuit analysis through convenient component values. The complexity of calculations is thereby reduced, with the understanding that...
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Assembly of Gold Nanorods into Chiral Plasmonic Metamolecules Using DNA Origami Templates
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Controlling Chirality across Length Scales using DNA.

Alessandro Cecconello1, Friedrich C Simmel1

  • 1Physics Department, TU München, Am Coulombwall 4a/II - 85748 Garching b., München, Germany.

Small (Weinheim an Der Bergstrasse, Germany)
|February 21, 2019
PubMed
Summary
This summary is machine-generated.

Chiral DNA nanoarchitectures offer precise control over molecular and material chirality. These advancements enable novel applications in nanomechanics and chiral recognition technologies.

Keywords:
DNA nanotechnologyasymmetric catalysiscircularly polarized lightmolecular recognitionnucleic acids

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Area of Science:

  • Nanotechnology
  • Materials Science
  • Biotechnology

Background:

  • Chiral nano-objects are crucial for applications like molecular recognition and nanomechanical devices.
  • Controlling chirality at the nanoscale is essential for advanced technological functions.
  • DNA nanotechnology provides powerful tools for designing chiral nanostructures.

Purpose of the Study:

  • To review key advances in chiral DNA nanoarchitectures.
  • To discuss recent developments in tailoring chirality using DNA.
  • To explore future perspectives and applications of these chiral nanostructures.

Main Methods:

  • Utilizing DNA nanotechnology for precise control over chirality.
  • Engineering configurational chirality (handedness of helical shapes).
  • Engineering compositional chirality (chiral positioning of nanoparticles).

Main Results:

  • Demonstrated precise tailoring of chiral properties at various length scales.
  • Successfully controlled helical shapes and nanoparticle arrangements.
  • Enabled spatial ordering of circularly polarized light emitters.

Conclusions:

  • Chiral DNA nanoarchitectures represent a significant advancement in nanoscale engineering.
  • These structures hold great promise for future applications in sensing, nanodevices, and optics.
  • Further research in this field will unlock new technological possibilities.