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Related Concept Videos

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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Structural Isomerism02:34

Structural Isomerism

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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.
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,...
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Stereoisomerism02:52

Stereoisomerism

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Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
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Structures of Solids02:22

Structures of Solids

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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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Stereoisomerism of Cyclic Compounds02:33

Stereoisomerism of Cyclic Compounds

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In this lesson, we delve into the role of ring conformation and its stability, which determines the spatial arrangement and, consequently, the molecular symmetry and stereoisomerism of cyclic compounds. 1,2-Dimethylcyclohexane is used as a case study to evaluate the possible number of stereoisomers. Here, given the multiple (n = 2) chiral centers, there are 2n = 4 possible configurations that lack a plane of symmetry, as the ring skeleton exists in a non-planar chair conformation. In addition,...
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Metallic Solids02:37

Metallic Solids

18.0K
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...
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Updated: May 15, 2025

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
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From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

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Rigidity-Driven Structural Isomers in the NaCl-Ga2S3 System: Implications for Energy Storage.

Maria Bokova1, Mohammad Kassem1, Takeshi Usuki2

  • 1Laboratoire de Physico-Chimie de l'Atmosphère Université du Littoral Côte d'Opale Dunkerque 59140 France.

Small Science
|April 11, 2025
PubMed
Summary

Innovative materials for alternative energy were discovered. A unique phase-dependent chemical interaction in the NaCl-Ga2S3 system leads to metastable isomers with high sodium-ion conductivity for solid-state batteries.

Keywords:
fast sodium halide conductorsnetwork rigiditysodium diffusionstructural isomers

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Area of Science:

  • Materials Science
  • Solid-State Chemistry
  • Energy Storage

Background:

  • Alternative energy technologies necessitate novel materials with advanced functionalities.
  • Systems exhibiting unusual chemical properties remain underexplored for potential applications.
  • The NaCl-Ga2S3 system presents an opportunity to investigate unique chemical behaviors.

Purpose of the Study:

  • To explore the chemical interactions and phase behavior within the NaCl-Ga2S3 system.
  • To investigate the potential of materials derived from this system for energy applications, particularly sodium-ion batteries.

Main Methods:

  • Utilized diffraction and Raman spectroscopy across a wide temperature range.
  • Employed first-principles simulations to support experimental observations.
  • Investigated the structural and chemical transformations during melting and rapid freezing.

Main Results:

  • A rare phenomenon of phase-dependent chemical interactions was observed in the NaCl-Ga2S3 system.
  • Binary crystalline components transform into mixed liquid structural isomers upon melting, with reversible behavior in stable states.
  • Rapidly frozen glasses exhibit metastable isomeric states with high room-temperature Na+ conductivity, comparable to leading superionic conductors.

Conclusions:

  • The observed rigidity paradigm in Ga2S3 drives structural isomerism and enhances sodium diffusivity.
  • Metastable isomeric glasses derived from the NaCl-Ga2S3 system show significant promise for sodium solid-state batteries.
  • This discovery opens a new avenue for designing atypical materials with unique properties for energy applications.