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Related Concept Videos

Structures of Solids02:22

Structures of Solids

18.8K
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...
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Recrystallization: Solid–Solution Equilibria01:10

Recrystallization: Solid–Solution Equilibria

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Recrystallization is a purification technique used to separate impurities from solid compounds. In this technique, no chemical reactions occur. Instead, it exploits physical properties only, specifically, the solubility differences between the desired compound and impurities, either at a single temperature or at different temperatures, and under other selected conditions. The solid-solution equilibrium (solubility equilibrium) of each component in the solution represents a binary phase...
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Weak Base Solutions03:21

Weak Base Solutions

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Some compounds produce hydroxide ions when dissolved by chemically reacting with water molecules. In all cases, these compounds react only partially and so are classified as weak bases. These types of compounds are also abundant in nature and important commodities in various technologies. For example, global production of the weak base ammonia is typically well over 100 metric tons annually, being widely used as an agricultural fertilizer, a raw material for chemical synthesis of other...
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Strong Acid and Base Solutions03:22

Strong Acid and Base Solutions

36.2K
A strong acid is a compound that dissociates completely in an aqueous solution and produces a concentration of hydronium ions equal to the initial concentration of acid. For example, 0.20 M hydrobromic acid will dissociate completely in water and produces 0.20 M of hydronium ions and 0.20 M of bromide ions.
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Metallic Solids02:37

Metallic Solids

20.9K
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....
20.9K
Leveling Effect and Non-Aqueous Acid-Base Solutions02:11

Leveling Effect and Non-Aqueous Acid-Base Solutions

9.8K
This lesson defines the leveling effect in acidic and basic solutions and its role in aqueous and non-aqueous solutions. It is essential to understand the competing nature of various species in a chemical system.
The Leveling Effect of a Solvent
A generic acid (HA) reacts with the generic base (B-) to yield the corresponding conjugate base (A-) and conjugate acid (HB):
9.8K

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Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of ChalcogenidoplumbatesII or IV
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Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of ChalcogenidoplumbatesII or IV

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Actinide-based MOFs: a middle ground in solution and solid-state structural motifs.

Ekaterina A Dolgopolova1, Allison M Rice, Natalia B Shustova

  • 1Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter Street, Columbia, SC 29208, USA. shustova@sc.edu.

Chemical Communications (Cambridge, England)
|February 16, 2018
PubMed
Summary
This summary is machine-generated.

Metal-organic frameworks (MOFs) show promise for nuclear waste management. Their structures can be optimized for actinide binding and the capture of radioactive fission products, aiding environmental protection.

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Area of Science:

  • Materials Science
  • Nuclear Chemistry
  • Environmental Science

Background:

  • Growing concerns about nuclear waste storage and environmental pollution necessitate innovative solutions.
  • Actinide chemistry presents unique challenges due to radioactivity and complex speciation.
  • Metal-organic frameworks (MOFs) offer tunable structures for advanced material applications.

Purpose of the Study:

  • To review recent advances in actinide-based MOFs for nuclear waste administration.
  • To correlate structural properties of actinide MOFs with actinide content and mineral motifs.
  • To explore MOF potential for capturing nuclear fission products.

Main Methods:

  • Comprehensive analysis of over 100 crystal structures of Uranium (U) and Thorium (Th)-based MOFs.
  • Investigation of structural density, actinide weight percentage, and bridging ligand motifs.
  • Evaluation of MOF modularity and porosity for material design and radionuclide capture.

Main Results:

  • Established correlations between structural density and actinide loading in MOFs.
  • Identified common structural motifs in actinide MOFs, linking them to natural mineral structures and solution chemistry.
  • Demonstrated MOF potential for stepwise hierarchical material construction and selective capture of technetium and iodine.

Conclusions:

  • Actinide MOFs offer a promising platform for fundamental actinide chemistry research.
  • The structural and functional attributes of MOFs can pave the way for more efficient nuclear waste management strategies.
  • MOF design can be tailored for improved containment and remediation of radioactive waste.