Jove
Visualize
お問い合わせ
JoVE
x logofacebook logolinkedin logoyoutube logo
JoVEについて
概要リーダーシップブログJoVEヘルプセンター
著者向け
出版プロセス編集委員会範囲と方針査読よくある質問投稿
図書館員向け
推薦の声購読アクセスリソース図書館諮問委員会よくある質問
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experimentsアーカイブ
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教員リソースセンター教員サイト
利用規約
プライバシーポリシー
ポリシー

関連する概念動画

Colors and Magnetism03:02

Colors and Magnetism

13.9K
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...
13.9K
Valence Bond Theory02:42

Valence Bond Theory

11.2K
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...
11.2K
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

30.6K
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...
30.6K
Complexation Equilibria: The Chelate Effect01:19

Complexation Equilibria: The Chelate Effect

1.2K
In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
1.2K
EDTA: Chemistry and Properties01:22

EDTA: Chemistry and Properties

3.3K
Polydentate ligands are most widely used in complexometric titrations because they form more stable complexes with the metal ions than mono- or bidentate ligands due to the chelate effect. Examples of polydentate ligands are ethylenediaminetetraacetic acid (EDTA), crown ethers, and cryptands. The most important feature of optimal polydentate ligands is the ability to form 1:1 complexes in a single-step process. Amino carboxylic acid derivatives are frequently used as complexing agents. EDTA is...
3.3K
Crystal Field Theory - Tetrahedral and Square Planar Complexes02:46

Crystal Field Theory - Tetrahedral and Square Planar Complexes

48.1K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
48.1K

こちらも読む

関連記事

共著者、ジャーナル、引用グラフによってこの研究に関連する記事。

並び替え
Same author

Palladium-Catalyzed Unsymmetrical bis-Allylation of Active Methylene Compounds Using Vinyl Sulfoxonium Ylides and Allyl Esters.

Organic letters·2026
Same author

Design Principles for Negative Thermal Expansion in Two-Dimensional Materials.

Accounts of chemical research·2026
Same author

Mentorship Strategies for New Principal Investigators in Computational Chemistry.

Journal of chemical information and modeling·2026
Same author

LMCT enabled photo-decarboxylative C-N cross-coupling of α,β-unsaturated acids with pyrazoles.

Chemical communications (Cambridge, England)·2026
Same author

Observation of Donor-Bound Excitons in n-Type-Doped Two-Dimensional Semiconductor Nanocrystals.

ACS nano·2026
Same author

Blue Vitriol Catalyzed Decarboxylative C-C Cross-Coupling of α,β-Unsaturated Acids for C-H Functionalization of Unactivated Ethers.

Organic letters·2026

関連する実験動画

Updated: Jan 13, 2026

An Aptamer-based Sensor for Unchelated GadoliniumIII
05:15

An Aptamer-based Sensor for Unchelated GadoliniumIII

Published on: January 9, 2017

7.8K

ランタニド溶媒和の再訪：「ガドリニウムブレーク」は確かに存在する

Aritra Marick1, Ria Saha1, Soumya Mondal2

  • 1Department of Chemical and Biological Sciences, S.N. Bose National Centre for Basic Sciences, JD-Block, Sector-III, Salt Lake, Kolkata 700106, India.

The journal of physical chemistry letters
|January 6, 2026
PubMed
まとめ

ランタニド(III)イオンの溶媒和は非単調であり、ガドリニウムに明確な「Gdブレーク」が見られます。この発見は、技術的応用における重金属陽イオンの環境影響を理解する上で極めて重要です。

キーワード:
ランタニド溶媒和ガドリニウムブレークテラヘルツ分光法分子動力学シミュレーション

さらに関連する動画

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

15.3K
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

18.4K

関連する実験動画

Last Updated: Jan 13, 2026

An Aptamer-based Sensor for Unchelated GadoliniumIII
05:15

An Aptamer-based Sensor for Unchelated GadoliniumIII

Published on: January 9, 2017

7.8K
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

15.3K
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

18.4K

科学分野:

  • 無機化学
  • 物理化学
  • 分光法

背景:

  • ランタニド（Ln）は、レドックス挙動や配位子配位を含む独自の化学的特性を持っています。
  • 系列全体にわたるランタニド特性の傾向は、しばしば非線形であり、ガドリニウム（Gd）における「Gdブレーク」が議論されています。

研究 の 目的:

  • 希薄溶液中のランタニド(III)イオンの溶媒和挙動を調査すること。
  • ランタニド溶媒和における「Gdブレーク」の存在と性質を明らかにすること。

主な方法:

  • テラヘルツ（THz）時間領域および周波数領域分光法。
  • 分子動力学（MD）シミュレーション。
  • ランタニド(III)塩化物溶液（La3+、Nd3+、Gd3+、Ho3+、Lu3+）の検査。

主要な成果:

  • ランタニド(III)イオンの溶媒和は、系列全体で非単調です。
  • ガドリニウム（Gd）で溶媒和挙動の明確なブレークが観察されます。
  • 結果は、ランタニド特性における滑らかな傾向という以前の考えに異議を唱えます。

結論:

  • ランタニド(III)溶媒和における「Gdブレーク」が確認されました。
  • 重金属陽イオンの環境への曝露が増加しているため、ランタニド溶媒和を理解することは不可欠です。
  • この研究は、ランタニドの生態学的影響を評価するための基礎知識を提供します。