メタル・オーガニック・フレームワーク・マテリアル内のアニゾトロプ・レドックス伝導性
Subhadip Goswami1, Idan Hod2, Jiaxin Dawn Duan1
1Department of Chemistry , Northwestern University , 2145 Sheridan Road , Evanston 60208 , Illinois , United States.
Journal of the American Chemical Society
|October 15, 2019
まとめ
メタル・オーガニック・フレームワーク (MOF) は,リドックス・ホッピングによって電気伝導性が得られます. この研究は,NU-1000 MOFの無極性伝導性を示し,一方的に有意に高い伝導性を示した.
科学分野:
- 材料科学
- 電気化学
- ナノテクノロジー
背景:
- 電気伝導性は,触媒などの用途で金属有機フレームワーク (MOF) に非常に重要です.
- 隔離用MOFには,より広範な機能のための充電輸送を可能にする戦略が必要です.
- NU-1000は,導電性の強化の可能性のあるプラットフォームMOFです.
研究 の 目的:
- NU-1000 MOFの電気伝導性を設計する.
- レドックスホッピングによる電荷輸送のメカニズムを調査する.
- 構造に基づいてNU-1000のアニゾトロプ的電気伝導性を探求する.
主な方法:
- テトラフェニルピレンのリバーシブルな電気化学的酸化をNU-1000で行う.
- 電子結合と伝導性を予測するための計算モデル.
- 導電性アニソトロピーをテストするためにNU-1000結晶体の実験的指向 (界面溶熱合成,電泳性沉積)
主要な成果:
- NU-1000 MOFは,酸化されたリンクナーのリドックスホッピングによって電気伝導性を示す.
- 計算上の予測は方向に依存する電子結合の強さを示しています.
- 実験結果は,a,b平面と比較して,c方向に沿って~3500倍高い伝導性が有意なアニソトロピーであることを確認しています.
結論:
- レドックスホッピングは,MOFの電気伝導性を達成するための有効なメカニズムを提供します.
- NU-1000のアニゾトロプ的伝導性は,リンクアー電子カップリングとMOFトポロジーによって制御されます.
- 発見は,電解および他のアプリケーションのための導電性MOFの設計にインパクトを与える.
さらに関連する動画
07:14Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers
Published on: May 12, 2023
3.7K
06:45Author Spotlight: Characterizing Porous Materials for Aiding the Development of Robust Metal-Organic Frameworks with Adsorption Behavior
Published on: March 8, 2024
9.7K
関連する概念動画
02:51Metal-Ligand Bonds
23.7K
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...
23.7K
02:58Crystal Field Theory - Octahedral Complexes
30.3K
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...
30.3K
01:23Properties of Organometallic Compounds
1.6K
Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.
1.6K
02:34Structural Isomerism
21.4K
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...
21.4K
01:23Redox Equilibria: Overview
1.5K
A reduction-oxidation reaction is commonly called a redox reaction. In a redox reaction, electrons are transferred from one species to another rather than being shared between or among atoms. The reducing agent or reductant is the species that loses electrons and gets oxidized in the process. The species that gains electrons and gets reduced in the process is the oxidizing agent or oxidant. Redox reactions are represented as two separate equations called half-reactions, where one equation...
1.5K
03:02Colors and Magnetism
13.8K
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...
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...
13.8K