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Related Concept Videos

Metallic Solids02:37

Metallic Solids

18.4K
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....
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Ionic Crystal Structures02:42

Ionic Crystal Structures

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Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
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Lattice Centering and Coordination Number02:33

Lattice Centering and Coordination Number

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The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1.
Types of Unit Cells
Imagine taking a large number of identical...
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Liquid-cell Transmission Electron Microscopy for Tracking Self-assembly of Nanoparticles
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A Silver Nanocluster Assembled by a Superatomic Building Unit.

Wei-Jung Yen1, Jian-Hong Liao1, Tzu-Hao Chiu1

  • 1Department of Chemistry, National Dong Hwa University, Hualien 97401, Taiwan, Republic of China.

Inorganic Chemistry
|March 12, 2024
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Summary

Researchers created a supramolecule using a silver superatom building block linked by 4,4-bipyridine. This self-assembly influences the silver nanoclusters

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Area of Science:

  • Supramolecular chemistry
  • Nanomaterials science
  • Inorganic chemistry

Background:

  • Silver nanoclusters exhibit unique photophysical properties.
  • Superatoms serve as fundamental building blocks in nanomaterials.
  • Self-assembly is a key strategy for constructing complex nanostructures.

Purpose of the Study:

  • To construct a novel supramolecule using a silver superatom.
  • To investigate the role of a 4,4-bipyridine linker in assembly.
  • To explore the impact of self-assembly on photophysical properties.

Main Methods:

  • Synthesis of a two-electron superatom, [Ag10{S2P(OPr)2}8].
  • Assembly of the superatom into a supramolecule using a 4,4-bipyridine linker.
  • Characterization of the supramolecular structure and its photophysical properties.

Main Results:

  • A unique supramolecule, [Ag10{S2P(OPr)2}8]2(μ-4,4-bpy), was successfully assembled.
  • The assembly process was facilitated by an accessible open site on the superatom.
  • The supramolecule exhibited minimal solvatochromic shifts across various organic solvents.

Conclusions:

  • Self-assembly of silver superatoms leads to novel supramolecular architectures.
  • The linker molecule plays a crucial role in directing the assembly.
  • The photophysical properties of silver nanoclusters are significantly influenced by supramolecular assembly.