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Related Experiment Video

Updated: Mar 9, 2026

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

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

Published on: October 10, 2016

Quasimolecules in Compressed Lithium.

Mao-Sheng Miao^1,2, Roald Hoffmann³, Jorge Botana^1,2

¹Department of Chemistry and Biochemistry, California State University, Northridge, CA, 91330, USA.

Angewandte Chemie (International Ed. in English)

|December 22, 2016

Summary

This summary is machine-generated.

High-pressure electrides can form interstitial quasiatoms (ISQ) that behave like atoms. This study provides evidence for covalently bonded ISQ pairs in the semiconducting lithium phase, explaining its insulating properties.

Keywords:

density functional calculations high pressure electrides interstitial quasi-atoms maximally localized Wannier functions semiconducting lithium

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Area of Science:

Materials Science
Solid-State Physics
Quantum Chemistry

Background:

High pressure can induce unique electronic structures in materials, leading to the formation of electrides.
Electrides feature delocalized valence electrons in interstitial regions, often resulting in semiconducting or insulating properties.
Interstitial quasiatoms (ISQ) are theoretical constructs within electrides, potentially exhibiting atomic-like chemical behavior.

Purpose of the Study:

To investigate the chemical nature of interstitial quasiatoms (ISQ) in high-pressure electrides.
To determine if ISQ can form covalent bonds, analogous to atoms.
To explain the insulating behavior of the high-pressure semiconducting lithium phase (oC40, Aba2) using the quasimolecule concept.

Main Methods:

Theoretical evaluation of electron density.
Analysis of the electron localization function (ELF).
Wannier orbital analysis and bond index calculations.

Main Results:

Evidence for covalently bonded ISQ pairs was found in the high-pressure semiconducting Li phase.
The quasimolecule concept successfully explains the insulating behavior.
The findings complement existing physical models focusing on crystal symmetry.

Conclusions:

Interstitial quasiatoms in high-pressure electrides can form covalent bonds, acting as quasimolecules.
The quasimolecule model offers a simplified chemical perspective on the electronic properties of these materials.
This research bridges chemical intuition and physical understanding of exotic high-pressure phases.