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Related Concept Videos

Metallic Solids02:37

Metallic Solids

18.3K
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....
18.3K
Ionic Crystal Structures02:42

Ionic Crystal Structures

14.2K
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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Valence Bond Theory02:42

Valence Bond Theory

8.5K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
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Structural Isomerism02:34

Structural Isomerism

19.2K
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...
19.2K
Structures of Solids02:22

Structures of Solids

14.1K
Solids in which the atoms, ions, or molecules are arranged in a definite repeating pattern are known as crystalline solids. Metals and ionic compounds typically form ordered, crystalline solids. A crystalline solid has a precise melting temperature because each atom or molecule of the same type is held in place with the same forces or energy. Amorphous solids or non-crystalline solids (or, sometimes, glasses) which lack an ordered internal structure and are randomly arranged. Substances that...
14.1K
Lattice Centering and Coordination Number02:33

Lattice Centering and Coordination Number

9.6K
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...
9.6K

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Updated: Jun 19, 2025

Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks
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Coassembly of Complementary Polyhedral Metal-Organic Framework Particles into Binary Ordered Superstructures.

Lingxin Meng1, Javier Fonseca1, Roberto Sánchez-Naya1,2

  • 1Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC, and Barcelona Institute of Science and Technology Campus UAB, 08193 Bellaterra, Barcelona, Spain.

Journal of the American Chemical Society
|July 26, 2024
PubMed
Summary
This summary is machine-generated.

Researchers created a 3D porous superstructure using two types of metal-organic framework (MOF) particles. This self-assembly method also formed 2D structures with polystyrene, enabling complex material design.

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Synthesis and Characterization of Functionalized Metal-organic Frameworks
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Synthesis and Characterization of Functionalized Metal-organic Frameworks

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Supramolecular Chemistry

Background:

  • Metal-organic frameworks (MOFs) are versatile porous materials with tunable properties.
  • Hierarchical structuring of MOFs is crucial for advanced applications.
  • Colloidal self-assembly offers a bottom-up approach to creating complex architectures.

Purpose of the Study:

  • To report the formation of a 3D NaCl-type binary porous superstructure.
  • To demonstrate the coassembly of two distinct colloidal polyhedral MOF particles.
  • To explore the use of a polymeric-attenuated Coulombic self-assembly approach for creating binary superstructures.

Main Methods:

  • Coassembly of two colloidal polyhedral metal-organic framework (MOF) particles with complementary characteristics.
  • Utilizing a polymeric-attenuated Coulombic self-assembly strategy.
  • Incorporating spherical polystyrene particles to form 2D binary superstructures.

Main Results:

  • Successful formation of a 3D NaCl-type binary porous superstructure.
  • Demonstrated coassembly of MOF particles with polystyrene spheres into 2D superstructures.
  • Established a method for creating complex superstructures from diverse particle types.

Conclusions:

  • The coassembly of complementary MOF particles enables the formation of sophisticated 3D superstructures.
  • The employed self-assembly approach is versatile, allowing for the creation of both 2D and 3D binary structures.
  • This work opens avenues for designing advanced materials with tailored porosity and composition using MOFs.