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Noble Gases

Noble Gases

The elements in group 18 are noble gases (helium, neon, argon, krypton, xenon, and radon). They earned the name “noble” because they were assumed to be nonreactive since they have filled valence shells. In 1962, Dr. Neil Bartlett at the University of British Columbia proved this assumption to be false.

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Few compounds act as strong acids. A far greater number of compounds behave as weak acids and only partially react with water, leaving a large majority of dissolved molecules in their original form and generating a relatively small amount of hydronium ions. Weak acids are commonly encountered in nature, being the substances partly responsible for the tangy taste of citrus fruits, the stinging sensation of insect bites, and the unpleasant smells associated with body odor. A familiar example of a...

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Alkali Metals

Alkali Metals

Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
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1,3,5-Triphenylbenzene and Corannulene as Electron Receptors for Lithium Solvated Electron Solutions

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Stable Lithium Argon compounds under high pressure.

Xiaofeng Li^1,2, Andreas Hermann³, Feng Peng^1,2

¹Beijing Computational Science Research Center, Beijing 100084, P. R. China.

Scientific Reports

|November 20, 2015

Summary

This summary is machine-generated.

High pressure enables normally inert argon (Ar) to form stable compounds with lithium (Li). These novel Li-Ar compounds exhibit unique electronic properties and potential superconductivity.

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1,3,5-Triphenylbenzene and Corannulene as Electron Receptors for Lithium Solvated Electron Solutions

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Published on: October 10, 2016

$Synthesis and Microdiffraction at Extreme Pressures and Temperatures$

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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

Published on: December 20, 2016

Area of Science:

Materials Science
Quantum Chemistry
Solid State Physics

Background:

High pressure profoundly influences chemical bonding and element reactivity.
Noble gases like argon are typically considered inert under ambient conditions.

Purpose of the Study:

To investigate the stability and structures of lithium-argon (Li-Ar) compounds under high pressure.
To explore the chemical behavior and electronic properties of argon in these novel compounds.

Main Methods:

Utilized the CALYPSO methodology for unbiased structure searching.
Employed density functional theory for total energy calculations and phase stability analysis.
Analyzed electronic structures to understand bonding and reactivity.

Main Results:

Predicted the stability of LiAr and Li3Ar compounds above 112 GPa and 119 GPa, respectively.
Revealed that argon acts as an oxidizing agent in these Li-Ar compounds, a departure from its known inertness.
Identified a potential superconducting transition temperature of 17.6 K at 120 GPa for the P4/mmm phase of Li3Ar.

Conclusions:

High pressure can stabilize unexpected compounds involving elements typically considered unreactive.
The electronic behavior of argon in Li-Ar compounds challenges conventional chemical understanding.
These findings open new avenues for exploring high-pressure chemistry and novel superconducting materials.