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Related Concept Videos

Valence Bond Theory02:42

Valence Bond Theory

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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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Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types.  Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
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Coordination Number and Geometry02:57

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For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.
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Coordination Compounds and Nomenclature02:54

Coordination Compounds and Nomenclature

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In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For instance, the four valence electrons of carbon overlap with electrons from four hydrogen atoms to form CH4. The one valence electron leaves sodium and adds to the seven valence electrons of chlorine to form the ionic formula unit NaCl (Figure 1a). Transition metals do not normally bond in this fashion. They primarily form coordinate covalent bonds, a...
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Metal-Ligand Bonds02:51

Metal-Ligand Bonds

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The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
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Structural Isomerism02:34

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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.
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Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly
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Increasing structural and functional complexity in self-assembled coordination cages.

Sonja Pullen1,2, Jacopo Tessarolo1, Guido H Clever1

  • 1Department of Chemistry and Chemical Biology, TU Dortmund University Otto-Hahn-Straße 6 44227 Dortmund Germany jacopo.tessarolo@tu-dortmund.de guido.clever@tu-dortmund.de.

Chemical Science
|June 24, 2021
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Summary
This summary is machine-generated.

Metallo-supramolecular chemistry enables complex functional nanosystems. This review highlights strategies for creating multifunctional self-assembled cages for advanced applications in sensing and catalysis.

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Area of Science:

  • Metallo-supramolecular chemistry
  • Nanotechnology
  • Materials Science

Background:

  • Metal-mediated self-assembly has yielded diverse structural motifs, notably cages with nanoscale cavities.
  • These assemblies function as hosts for applications in molecular recognition and confined reactions.
  • Recent advancements include integrating specific functionalities like catalytic centers and photoswitches.

Purpose of the Study:

  • To review the implementation of function into self-assembled cages.
  • To present strategies for selectively forming heteroleptic (multi-component) structures.
  • To discuss the potential of these multifunctional systems in sensing, catalysis, and photo-redox applications.

Main Methods:

  • Review of literature on functional self-assembled cages.
  • Discussion of strategies for creating heteroleptic metallo-supramolecular assemblies.
  • Analysis of examples combining functional cages and heteroleptic principles.

Main Results:

  • Demonstration of incorporating multiple functions into single self-assembled cages.
  • Development of strategies for selective synthesis of heteroleptic cage structures.
  • Examples of multicomponent, multifunctional host-guest complexes are presented.

Conclusions:

  • Multifunctional self-assembled cages represent a significant advancement in supramolecular chemistry.
  • Heteroleptic assembly strategies are crucial for precise control over functionality.
  • These systems hold promise for sophisticated applications in sensing, catalysis, and photo-redox chemistry.