関連する実験動画
Updated: Mar 18, 2026
11:27
Synthesis and Characterization of Functionalized Metal-organic Frameworks
Published on: September 5, 2014
49.4K
頑丈な金属・有機組成構造のための協調自組成経路の正交的選択と固定
Michael J Burke1, Gary S Nichol1, Paul J Lusby1
1EaStCHEM School of Chemistry, University of Edinburgh , Joseph Black Building, David Brewster Road, Edinburgh, Scotland EH9 3FJ, U.K.
Journal of the American Chemical Society
|June 29, 2016
まとめ
この研究は,超分子化学のための新しい"組み立てに続く固定"戦略を導入します. この方法は,自己組み立ての伝統的な熱力学的制御の限界を克服し,高収量で堅固な構造を達成します.
科学分野:
- 超分子化学
- 材料科学
- 化学合成
背景:
- 伝統的な超分子組立は熱力学的制御に依存し,しばしば可逆性と構造的安定性の間のトレードオフを必要とします.
- 既存の方法は,自己組み立て構造の運動的強さを制限することができます.
研究 の 目的:
- 強固な超分子構造のための代替"組み立てに続く固定"戦略を提示する.
- 動力的に堅固なM2L3ヘリケートとM4L6テトラヘッドの合成を証明する.
- 異なる超分子構造間の刺激反応の切り替えを 探求する.
主な方法:
- 望ましい構造を運動的に捕まえるために,非環境条件下で"組み立てに続く固定"アプローチを使用します.
- M2L3ヘリケートとM4L6テトラヘッドの構築のためにビス (bidentate) リガンドを使用する.
- アーキテクチャ間の構造的なスイッチングを誘導するためのリドックスと光の刺激を調査する.
主要な成果:
- 超分子組の高収量で原子効率の良い合成を 達成した.
- 組立過程を凍結することによって,熱力学的に不利なM2L3ヘリケートの選択的形成が実証された.
- テトラヘッドとヘリケートアーキテクチャの間で刺激誘発 (リドックス,光) を成功裏に示した.
結論:
- "組み立てに続く固定"戦略は,超分子化学における熱力学的制御に強力な代替案を提供します.
- このアプローチにより,運動的に堅固な構造を作り出し,組み立て結果を正確に制御することができます.
- 刺激誘発された建築的変容を通して,ダイナミックで反応性の高い超分子材料の潜在能力を実証した.
関連する概念動画
02:42Valence Bond Theory
11.5K
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...
11.5K
02:51Metal-Ligand Bonds
25.3K
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...
25.3K
02:37Metallic Solids
21.3K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
21.3K
02:34Structural Isomerism
22.4K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
22.4K
01:18Assembly of Cytoskeletal Filaments
28.2K
Cytoskeletal filaments are polymeric forms of smaller protein subunits. However, individual cytoskeletal filaments may easily disassemble or associate with other similar filaments to form rigid structures. Microfilaments, made of actin monomers, rely on actin-binding proteins to form bundles and create networks of individual actin filaments. Microtubules rely on microtubule-associated proteins (MAPs) to form sturdy cylindrical structures. However, the proteins involved in forming complex...
28.2K
02:58Crystal Field Theory - Octahedral Complexes
31.6K
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...
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...
31.6K