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Updated: Jun 16, 2025

Light-driven Molecular Motors on Surfaces for Single Molecular Imaging
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Light-driven Molecular Motors on Surfaces for Single Molecular Imaging

Published on: March 13, 2019

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フェロマグネティック分子スピントリマーの表面合成

Alessio Vegliante1, Manuel Vilas-Varela2, Ricardo Ortiz3

  • 1CIC NanoGUNE-BRTA, Donostia-San Sebastián 20018, Spain.

Journal of the American Chemical Society
|May 30, 2025
PubMed
まとめ

研究者らは3つのペア化されていない電子を持つ 複雑なナノゲル分子 TTAT を生み出しました この分子は鉄磁気結合を示し,その結果,高スピンS=3/2状態となり,炭素ベースのスピントロニクスへの道を開く.

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Valence Bond Theory02:42

Valence Bond Theory

Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
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Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)

Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
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Spin–Spin Coupling: One-Bond Coupling01:17

Spin–Spin Coupling: One-Bond Coupling

Coupling interactions are strongest between NMR-active nuclei bonded to each other, where spin information can be transmitted directly through the pair of bonding electrons. While nuclei polarize their electrons to the opposite spins, the bonding electron pair has opposite spins. Configurations with antiparallel nuclear spins are expected to be lower in energy. When coupling makes antiparallel states more favorable, J is considered to have a positive value. The one-bond coupling constant, 1J,...
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