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関連する概念動画

Colors and Magnetism03:02

Colors and Magnetism

11.7K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
11.7K
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

26.4K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
26.4K
Properties of Transition Metals02:58

Properties of Transition Metals

25.8K
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
25.8K
UV–Vis Spectroscopy: Molecular Electronic Transitions01:16

UV–Vis Spectroscopy: Molecular Electronic Transitions

1.4K
In Ultraviolet–Visible (UV–Vis) spectroscopy, the absorption of electromagnetic radiation is used to probe the electronic structure of molecules. This technique provides insights into molecular electronic transitions, particularly the movement of electrons between different molecular orbitals. Radiation is absorbed if the energy of the electromagnetic radiation passing through the molecule is precisely equal to the energy difference between the excited and ground states. During this...
1.4K
Cooperative Allosteric Transitions01:58

Cooperative Allosteric Transitions

7.9K
Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...
7.9K
Stereoisomerism02:52

Stereoisomerism

11.9K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
11.9K

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関連する実験動画

Updated: Jun 28, 2025

Luminescence Resonance Energy Transfer to Study Conformational Changes in Membrane Proteins Expressed in Mammalian Cells
08:31

Luminescence Resonance Energy Transfer to Study Conformational Changes in Membrane Proteins Expressed in Mammalian Cells

Published on: September 16, 2014

12.1K

分子ランタニド複合体における工学クロック移行

Robert Stewart1,2,3, Angelos B Canaj4, Shuanglong Liu3,5

  • 1National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, United States.

Journal of the American Chemical Society
|April 15, 2024
PubMed
まとめ
この要約は機械生成です。

特定の構造を持つランタニド複合体は 量子技術の磁性量子ビットとして機能します 調整環境を変更すると,クロックトランジション周波数が調整され,コヒーレンスが向上し,磁気ノイズ感度が低下します.

さらに関連する動画

Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals
07:24

Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals

Published on: April 14, 2020

17.1K
Preparation, Purification, and Characterization of Lanthanide Complexes for Use as Contrast Agents for Magnetic Resonance Imaging
13:21

Preparation, Purification, and Characterization of Lanthanide Complexes for Use as Contrast Agents for Magnetic Resonance Imaging

Published on: July 21, 2011

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関連する実験動画

Last Updated: Jun 28, 2025

Luminescence Resonance Energy Transfer to Study Conformational Changes in Membrane Proteins Expressed in Mammalian Cells
08:31

Luminescence Resonance Energy Transfer to Study Conformational Changes in Membrane Proteins Expressed in Mammalian Cells

Published on: September 16, 2014

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Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals
07:24

Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals

Published on: April 14, 2020

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Preparation, Purification, and Characterization of Lanthanide Complexes for Use as Contrast Agents for Magnetic Resonance Imaging
13:21

Preparation, Purification, and Characterization of Lanthanide Complexes for Use as Contrast Agents for Magnetic Resonance Imaging

Published on: July 21, 2011

15.0K

科学分野:

  • 量子技術
  • 分子磁気
  • 量子コンピューティング

背景:

  • 分子ランタニド (Ln) コンプレックスは量子技術の鍵です.
  • 高対称性Ln複合体は磁性量子ビットの量子二層システムを形成する.
  • Ln複合体における対称性の低下は,クロックトランジションを通じてコヒーレンスを強化する.

研究 の 目的:

  • 九座標ホルミウム (HoIII) 複合体を量子応用のために研究する.
  • 結晶フィールドの特性に対するリガンド環境の影響を詳細に説明する.
  • クイビット性能の改善のためのクロックトランジションの調整性を実証する.

主な方法:

  • 単結晶高周波電子パラマグネティック共振 (EPR) スペクトロスコーピー
  • 高レベルの量子化学計算を始める
  • 異なるL2リガンド (F-またはMeCN) を含む[HoIII L1 L2]複合体の合成と特徴付け.

主要な成果:

  • [HoIII L1 F]の擬似4倍対称性は,強い軸性アニソトロピーとmJ = ±8の基本状態準二倍を生み出します.
  • フッ化物複合体では116.4 ± 1.0GHzの巨大なクロックトランジションが観察されました.
  • F- を MeCN (HoIII L1 MeCN) で置き換えると,クロック移行頻度は2.2倍に増加した.

結論:

  • クリスタル・フィールド・エンジニアリングは 分子量子ビットのクロック・トランジション周波数を 調整するルートを提示します
  • 時計の移行周波数が増加すると,磁気騒音に対する感度が低下し,コヒーレンスが向上します.
  • これらの発見は 量子テクノロジーのための 強力な分子量子ビットの開発の道を開きます