制御された自己組立,同体化,および,充電可逆ランタニド有機八面体ケージの客の取り込み/放出
Li-Peng Zhou1, Xiao-Shan Feng1, Shao-Jun Hu1
1State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China.
Journal of the American Chemical Society
|August 7, 2023
まとめ
この研究では,電荷の逆転性ランタニド有機ケージを導入し,電荷に基づいてゲストを選択的に結合することができます. これらの適応性の高い超分子材料は 調節可能な特性を備えたスマートシステムの開発に 潜在力を備えています
科学分野:
- 超分子化学
- 協調化学
- 材料科学
背景:
- 電荷の調節は 分子や超分子のシステムにとって不可欠です
- オートゴーナルな電荷制御を備えた協調ホストの開発は依然として課題です.
研究 の 目的:
- 負荷の逆転可能なランタニド有機四面体ケージの条件依存の自己組み立てを報告する.
- これらの新しいケージのイソメリズムとホスト-ゲストの性質を探求する.
- スマートな超分子材料の開発の可能性を調査する.
主な方法:
- ランタニドイオン (Ln = Lu, Yb, Eu) がトリトピックテトラデント酸アシルヒドラゾンリガンド (H6L) で自己組み立てられる.
- リガンドのpH依存型脱プロトン化によるケージ電荷の制御.
- X線単結晶微分を用いた特徴化.
- アニオン系とカチオン系と結合する研究
- Ybベースのケージの光物理学的研究
主要な成果:
- [Ln6 (H3L) ]6+と[Ln6 (L4) ]6−を合成した.
- 制御された自己組み立てと脱プロトネーションを通じて,ラセミクケージの独占的形成を達成した.
- アニオニックケージによるアニオニックスルフォナートと,アニオニックケージによるアンモニアムゲストの選択的結合が実証されている.
- Yb-ケージで観測された可視光感受性およびゲストエンカプスレーション強化のNIR放射.
結論:
- 開発されたランタニド有機ケージは,調節可能な電荷と選択的なゲスト結合を示す.
- 酸と塩基で誘発されたゲストの吸収と放出は,電荷の可逆性のために実現可能である.
- これらのケージは センシングと触媒の応用可能な 超分子材料の有望な候補です
さらに関連する動画
関連する概念動画
02:58Crystal Field Theory - Octahedral Complexes
26.8K
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...
26.8K
02:42Valence Bond Theory
8.7K
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...
8.7K
01:19Complexation Equilibria: The Chelate Effect
553
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...
553
02:34Structural Isomerism
19.4K
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...
19.4K
02:52Stereoisomerism
12.1K
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...
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...
12.1K
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
42.9K
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,...
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,...
42.9K