関連する実験動画
Updated: Jul 10, 2026
08:25
Chemical Vapor Deposition of an Organic Magnet, Vanadium Tetracyanoethylene
Published on: July 3, 2015
オクタシアンメタラートベースの単分子磁石:Co ((II) 9M ((V) 6 (M = W, Mo)
You Song1, Peng Zhang, Xiao-Ming Ren
1Coordination Chemistry Institute and the State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, China. yousong@nju.edu.cn
Journal of the American Chemical Society
|March 18, 2005
まとめ
コバルトを含む2つの新しいオクタシアンメタラートクラスターが合成されました. 両方の複合体は単一分子磁石の行動を示し,分子磁気の研究を進めています.
科学分野:
- 協調化化学について
- マテリアルサイエンス 材料科学
- マグネティズム (磁気) とは
背景:
- オクタシアンメタラート複合体は,その多様な磁気特性で知られている.
- コバルト基のクラスターは,単一分子磁石の開発に興味があります.
- 構造と性質の関係を理解することは,高度な磁気材料の設計の鍵です.
研究 の 目的:
- 新しいオクタシアンメタラートベースのクラスタを合成し,特徴づけること.
- これらの新しいコバルトを含む複合物の磁気特性を調査するために.
- 合成された化合物が単一分子磁石の振る舞いを示すかどうかを判断する.
主な方法:
- 2つの異なるコバルト-オクタシアンメタラート群の溶熱合成.
- X線微分法を用いた構造的特徴化.
- 温度に依存する感受性を含む磁気特性測定.
主要な成果:
- 2つの新しいクラスターの合成が成功しました: {CoII9[WV(CN) ]8.6. (CH3OH) 24}.19H2O (1) と {CoII9[MoV (CN) ]8]6.6.2O (1) と {CoII9[MoV (CN) ]8]6.2O (1) と {CoII9[MoV (CN) ]2O (2) と {CoII9[MoV (CN) ]2O (3) と {CoII9[MoV (CN)) ]2O (3) と {CoII9[MoV (CN)) ]2O (4) と {CoII9[MoV (CN)) ]2O (3) と {CoII9[MoV (CN)) }2O (4) と {CoII9[MoV (CN)) ]2O (4) と {CoII9[MoV (CN)) ]2O (CO) ]2O (CO) ]2O (CO) ]2O (CO) が含まれているため,この化合物は, (CH3OH) 24}.4CH3OH.16H2O (2). について説明します.
- 両複合体とも,特徴的な単分子磁石の振る舞いを示した.
- オクタシアンメタラートリガンドの特定の金属イオン (WまたはMo) は結晶構造と包装に影響を与えます.
結論:
- 合成されたコバルト-オクタシアンメタラートクラスターは,単分子磁石として有望である.
- この研究は,分子磁性材料のライブラリを拡張します.
- 追加の研究は,金属イオンまたはリガンドを改変することによって,特性を調節することを探求することができます.
さらに関連する動画
08:55Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
06:53Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
Published on: June 9, 2023
関連する概念動画
02:54Coordination Compounds and Nomenclature
In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For instance, the four valence electrons of carbon overlap with electrons from four hydrogen atoms to form CH4. The one valence electron leaves sodium and adds to the seven valence electrons of chlorine to form the ionic formula unit NaCl (Figure 1a). Transition metals do not normally bond in this fashion. They primarily form coordinate covalent bonds, a...
02:51Metal-Ligand Bonds
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
02:42Valence 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...
02:58Crystal Field Theory - Octahedral Complexes
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...
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...
03:02Colors and Magnetism
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 eye.
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 eye.
01:31Ferromagnetism
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...