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関連する概念動画

Network Covalent Solids02:18

Network Covalent Solids

Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
Crystal Field Theory - Octahedral Complexes02:58

Crystal 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...
Two-Dimensional (2D) NMR: Overview01:12

Two-Dimensional (2D) NMR: Overview

The 1D NMR spectrum of large and complex molecules like natural products has complicated splitting patterns and overlapping signals, which can be easily interpreted using 2-dimensional (2D) NMR. Unlike 1D NMR, 2D NMR has two frequency axes that provide the coupling information between the nucleus A and nucleus B in a molecule. The process from which 2D spectra are obtained has four steps.
The first step is the preparation period, during which nucleus A is excited with a radiofrequency pulse.
Crystal Field Theory - Tetrahedral and Square Planar Complexes02:46

Crystal Field Theory - Tetrahedral and Square Planar Complexes

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,...
Newman Projections02:06

Newman Projections

Different notations are used to represent the three-dimensional structure of molecules on two-dimensional surfaces. One of the most commonly used representations is the dash-wedge formula. The dashed wedges, solid wedges, and the plane lines indicate the groups situated behind the plane, coming out of the plane, and in the plane, respectively.
The organic molecules rotate across the single bonds leading to numerous temporary three-dimensional structures of varying energy known as conformers.
Aromatic Hydrocarbon Cations: Structural Overview01:18

Aromatic Hydrocarbon Cations: Structural Overview

Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
Removing one hydrogen from the intervening CH2 group with both...

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関連する実験動画

Updated: May 30, 2026

Microfluidic-based Synthesis of Covalent Organic Frameworks (COFs): A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface
08:42

Microfluidic-based Synthesis of Covalent Organic Frameworks (COFs): A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface

Published on: July 10, 2017

nチャネルの二次元共性有機構造体である.

Xuesong Ding1, Long Chen, Yoshihito Honsho

  • 1Department of Materials Molecular Science, Institute for Molecular Science, National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki 444-8787, Japan.

Journal of the American Chemical Society
|August 26, 2011
PubMed
まとめ

新しい二次元共性有機フレームワーク (2D-NiPc-BTDA COF) が合成され,電子輸送特性と近赤外線光子の感度が向上しました. この材料は高い電子移動性を示し,高度な光電子アプリケーションの道を開く.

さらに関連する動画

Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks
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Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks

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Synthesis and Characterization of Functionalized Metal-organic Frameworks
11:27

Synthesis and Characterization of Functionalized Metal-organic Frameworks

Published on: September 5, 2014

関連する実験動画

Last Updated: May 30, 2026

Microfluidic-based Synthesis of Covalent Organic Frameworks (COFs): A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface
08:42

Microfluidic-based Synthesis of Covalent Organic Frameworks (COFs): A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface

Published on: July 10, 2017

Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks
05:26

Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks

Published on: February 10, 2023

Synthesis and Characterization of Functionalized Metal-organic Frameworks
11:27

Synthesis and Characterization of Functionalized Metal-organic Frameworks

Published on: September 5, 2014

科学分野:

  • マテリアルサイエンス 材料科学
  • 有機化学 オーガニック・ケミストリー
  • ナノテクノロジー ナノテクノロジー

背景:

  • 協和有機フレームワーク (COF) は,多様な用途を持つ結晶性多孔ポリマーです.
  • メタロフタロシアニンは,電子的および光学的性質で知られています.
  • 電子不足の構成要素は,COFの電子特性を調節することができます.

研究 の 目的:

  • ベンゾチアディアゾールとメタロフタロシアニンを共凝縮することで,新しい二次元共性有機構造 (2D-NiPc-BTDA COF) を合成する.
  • 結果となるCOFの構造と電子特性を調査する.
  • 光電子アプリケーション,特に近赤外線領域におけるその可能性を評価する.

主な方法:

  • メタロフタロシアニンと電子欠乏ベンゾチアジアゾール (BTDA) ブロックとの共濃縮反応.
  • 2D-NiPc-BTDA COFの構造と形態の特徴. 2D-NiPc-BTDA COFの構造と形態の特徴. 2D-NiPc-BTDA COFの構造と形態の特徴. 2D-NiPc.
  • 光学吸収率,光伝導率,電子の移動性を測定する.

主要な成果:

  • AAスタッキングによるベルト状の2D-NiPc-BTDA COFの形成.
  • BTDA統合時にホール輸送から電子輸送の動作に切り替える.
  • 1000nmまでの吸収幅を拡大し,パンクロマティック光伝導性.
  • 0.6cm(2) V(-1) s(-1) の高い電子移動性と,近赤外線光子に対する高い感受性.

結論:

  • BTDAブロックの統合は,メタロフタロシアニンベースのCOFの電子特性を効果的に変更します.
  • 2D-NiPc-BTDA COFは,近赤外線光電子機器の有望な特性を示しています.
  • この研究は,調節可能な充電輸送を備えた機能的なCOFの設計のための新しい戦略を提示しています.