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Related Concept Videos

Chirality in Nature02:30

Chirality in Nature

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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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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 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.
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Prochirality02:05

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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...
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Properties of Enantiomers and Optical Activity02:24

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It is essential to understand the difference between chiral and achiral interactions and the implications thereof in optical activity and their applications. Just as our feet, which are chiral, interact uniquely with chiral objects, such as a pair of shoes, but identically with achiral socks, enantiomers of a molecule exhibit different properties only when they interact with other chiral media. An example of a significant implication from this facet is the phenomenon known as optical activity,...
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Atomic Nuclei: Nuclear Spin State Overview01:03

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NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of...
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Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
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Chirality-Induced Spin Selectivity: An Enabling Technology for Quantum Applications.

Alessandro Chiesa1,2,3, Alberto Privitera3,4,5, Emilio Macaluso1,2,3

  • 1Università di Parma, Dipartimento di Scienze Matematiche, Fisiche e Informatiche, I-43124, Parma, Italy.

Advanced Materials (Deerfield Beach, Fla.)
|May 12, 2023
PubMed
Summary
This summary is machine-generated.

Researchers propose using chirality-induced spin selectivity to control molecular spin qubits. This method enables single-spin readout for quantum computing and sensing applications, even at higher temperatures.

Keywords:
chirality-induced spin selectivityelectron transfermagnetic resonancesmolecular nanomagnetsquantum computing

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Area of Science:

  • Quantum technology
  • Molecular spintronics
  • Chiral chemistry

Background:

  • Molecular spins are key for quantum technologies due to chemical tunability.
  • Controlling single molecular spins is challenging due to weak interactions with external stimuli.

Purpose of the Study:

  • To develop a method for initializing, manipulating, and reading out molecular spin qubits.
  • To leverage the chirality-induced spin selectivity (CISS) effect for spin-to-charge conversion.

Main Methods:

  • Utilizing numerical simulations with realistic parameters.
  • Designing a molecular system with a chiral bridge connecting a spin qubit to an electron donor-acceptor dyad.

Main Results:

  • Demonstrated the feasibility of the spin-to-charge conversion mechanism via CISS.
  • Showcased the potential for single-spin initialization, manipulation, and readout.
  • Indicated effectiveness even at relatively high temperatures.

Conclusions:

  • The CISS effect offers a viable pathway for controlling molecular spin qubits.
  • This approach could advance quantum computing and sensing technologies.
  • Enables robust quantum information processing with molecular systems.