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相关概念视频

Network Covalent Solids02:18

Network Covalent Solids

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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...
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Crystal Field Theory - Octahedral Complexes02:58

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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...
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All living things are formed mostly of carbon compounds called organic compounds. The category of organic compounds includes both natural and synthetic compounds that contain carbon. Although a single, precise definition has yet to be identified by the chemistry community, most agree that a defining trait of organic molecules is the presence of carbon as the principal element, bonded to hydrogen and other carbon atoms. However, some carbon-containing compounds such as carbonates, cyanides, and...
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Covalent Bonding and Lewis Structures02:46

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Compared to ionic bonds, which results from the transfer of electrons between metallic and nonmetallic atoms, covalent bonds result from the mutual attraction of atoms for a “shared” pair of electrons. 
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Covalent Bonds01:29

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Overview
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Noncovalent Attractions in Biomolecules02:35

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Noncovalent attractions are associations within and between molecules that influence the shape and structural stability of complexes. These interactions differ from covalent bonding in that they do not involve sharing of electrons.
Four types of noncovalent interactions are hydrogen bonds, van der Waals forces, ionic bonds, and hydrophobic interactions.
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Updated: May 15, 2025

Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface
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半导体共价有机框架

Donglin Jiang1, Vincent Guan Wu Tan1, Yifan Gong1

  • 1Department of Chemistry, Faulty of Science, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.

Chemical reviews
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PubMed
概括
此摘要是机器生成的。

共价有机框架 (COF) 允许在有机半导体中精确的pi结构组织. 本综述探讨了半导体COF,它们的合成和各种应用,强调了未来进步的结构-属性关系.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 有机化学 有机化学
  • 半导体物理 半导体物理

背景情况:

  • 有机半导体对于现代电子产品至关重要,因为它们具有可调节的特性.
  • 一个关键的挑战是将有机π单位组织成有序结构,以提高性能.
  • 共价有机框架 (COF) 提供了一个创建有序π架构的平台.

研究的目的:

  • 审查半导体COF的结构特征,设计原则和合成.
  • 根据它们的结构-属性关系,探索半导体COF的各种应用.
  • 确定半导体COF领域的未来研究方向和挑战.

主要方法:

  • 探索用于COF合成的链接化学和合成策略 (例如,单聚合物化).
  • 分析COF在各种形式 (散装,纳米薄膜,薄膜,膜) 的制造.
  • 阐明COF与光子,声子,电子,孔,离子,分子和旋转之间的相互作用.

主要成果:

  • 开发一个丰富的半导体COF库,具有精确定义的π架构.
  • 将半导体COF分为九个应用领域的分类:半导体,光导体,发光器,传感器,光催化剂,光热转换材料,电催化剂,储能电极和激光旋转材料.
  • 在半导体COF中展示强大的结构起源性质和功能.

结论:

  • 半导体COF代表着有机半导体研究的重大进展.
  • 了解结构-功能相关性是释放其全部潜力的关键.
  • 未来的研究应该解决根本的挑战,并探索COF设计和应用的新前沿.