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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...
Semiconductors01:22

Semiconductors

There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
Metallic Solids02:37

Metallic Solids

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. Many...
Molecular and Ionic Solids02:54

Molecular and Ionic Solids

Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
Band Theory02:35

Band Theory

When two or more atoms come together to form a molecule, their atomic orbitals combine and molecular orbitals of distinct energies result. In a solid, there are a large number of atoms, and therefore a large number of atomic orbitals that may be combined into molecular orbitals. These groups of molecular orbitals are so closely placed together to form continuous regions of energies, known as the bands.
The energy difference between these bands is known as the band gap.
Conductor, Semiconductor,...
Types of Semiconductors01:20

Types of Semiconductors

Intrinsic semiconductors are highly pure materials with no impurities. At absolute zero, these semiconductors behave as perfect insulators because all the valence electrons are bound, and the conduction band is empty, disallowing electrical conduction. The Fermi level is a concept used to describe the probability of occupancy of energy levels by electrons at thermal equilibrium. In intrinsic semiconductors, the Fermi level is positioned at the midpoint of the energy gap at absolute zero. When...

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関連する実験動画

Updated: Jul 9, 2026

Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework
12:30

Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework

Published on: April 9, 2018

半導体鉛-硫黄-有機ネットワーク固体

Dayna L Turner1, Thomas P Vaid, Peter W Stephens

  • 1Department of Chemistry and Center for Materials Innovation, Washington University, St. Louis, Missouri 63130, USA.

Journal of the American Chemical Society
|December 11, 2007
PubMed
まとめ

ベンゼネチオールとエチレンダイアミンから合成された新しい鉛調整ポリマーには,多様な構造と特性があります. その結果生じる材料は,分子単位から無機固体のような結合まで,半導体として特定された一つの化合物があります.

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
  • 固体化学 固体化学

背景:

  • 鉛化合物とその協調ポリマーは,その多様な構造モチーフと潜在的な用途のために興味があります.
  • ベンゼネチオールは,複雑な金属有機構造体を構築するための多用途のリガンドとして機能します.

研究 の 目的:

  • 異なるベンゼネチオールリガンドを用いた新しい鉛協調ポリマーを合成し,特徴づけること.
  • これらの新しい材料の構造的多様性と結合特性を調査する.
  • 構造と特性,特に電気伝導性の関係を探求する.

主な方法:

  • 鉛 (II) アセテートが1,2,4,5-ベンゼンネテトラチオール,1,4-ベンゼンネディチオール,およびベンゼンヘキサチオールとエチレンダイアミンの反応.
  • シンクロトロンX線粉末微分と単結晶X線微分を用いた構造の決定.
  • 結合モードの分析と,光学および電気特性との相関.

主要な成果:

  • 3つの異なる鉛調整ポリマーの合成: [Pb2 ((S2C6H2S2) ((en)) ]n (黄色), [Pb3 ((SC6H4S)) 3 ((en)) 2n (オレンジ色-赤),および [Pb3C6S6]n (茶色).
  • 構造の解明により, [Pb2 ((S2C6H2S2) ((en)) ]n の"分子"単位と, [Pb3C6S6]n の無機固体のような結合が明らかになった.

さらに関連する動画

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
05:33

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

Preparation of Monodomain Liquid Crystal Elastomers and Liquid Crystal Elastomer Nanocomposites
12:21

Preparation of Monodomain Liquid Crystal Elastomers and Liquid Crystal Elastomer Nanocomposites

Published on: February 6, 2016

関連する実験動画

Last Updated: Jul 9, 2026

Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework
12:30

Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework

Published on: April 9, 2018

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
05:33

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

Preparation of Monodomain Liquid Crystal Elastomers and Liquid Crystal Elastomer Nanocomposites
12:21

Preparation of Monodomain Liquid Crystal Elastomers and Liquid Crystal Elastomer Nanocomposites

Published on: February 6, 2016

  • [Pb3C6S6]nは半導体として識別され,さまざまな電子特性を示した.

    • 結論:

    • ベンゼンエチオール・リガンドの選択は,鉛協調ポリマーの構造と結合に大きく影響します.
    • 合成された材料は,離散分子アセンブリから拡張された無機ネットワークまで,結合型のスペクトルを示しています.
    • [Pb3C6S6]nの半導体特性により,これらの鉛-硫黄系における電子特性を調節する可能性を強調しています.