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Vapor Pressure

Vapor Pressure

When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase molecules move randomly about, they will occasionally collide with the surface of the condensed phase, and in some cases, these collisions will result in the molecules re-entering the condensed phase. The change from the gas phase to the liquid is called condensation. When the rate of condensation becomes equal to the rate of vaporization, neither the amount of the liquid nor the amount of the vapor...

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The equilibrium vapor pressure of a liquid is the pressure exerted by its gaseous phase when vaporization and condensation are occurring at equal rates:

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Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...

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Updated: Jan 6, 2026

$Synthesis and Microdiffraction at Extreme Pressures and Temperatures$

Synthesis and Microdiffraction at Extreme Pressures and Temperatures

Published on: October 7, 2013

Low-Dimensional VS₃ Synthesized at Elevated Pressure.

Danrui Ni¹, Guangming Cheng², Stephen Zhang¹

¹Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States.

Inorganic Chemistry

|October 28, 2025

Summary

This summary is machine-generated.

A new material, Vanadium Trisulfide (VS3), was synthesized using high-pressure methods. This novel transition metal trichalcogenide exhibits a unique low-dimensional structure and semiconducting properties.

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Area of Science:

Materials Science
Solid-State Chemistry
Condensed Matter Physics

Background:

Transition metal trichalcogenides are an important class of materials with diverse electronic and magnetic properties.
The synthesis and characterization of novel compounds within this class can lead to the discovery of new phenomena and applications.

Purpose of the Study:

To report the first successful synthesis of Vanadium Trisulfide (VS3).
To characterize the crystal structure and preliminary physical properties of the newly synthesized VS3.

Main Methods:

High-pressure solid-state synthesis.
Rietveld refinement using Powder X-ray Diffraction (PXRD) for crystal structure determination.
High-Resolution Scanning Transmission Electron Microscopy (HR-STEM) for structural confirmation.
Magnetic susceptibility measurements.
Electrical conductivity measurements.

Main Results:

Successfully synthesized VS3, a previously unreported transition metal trichalcogenide.
Determined a low-dimensional crystal structure featuring uncommon V-S coordination polyhedra and S-S dimers.
Observed low-moment paramagnetic behavior and semiconducting nature.

Conclusions:

The successful synthesis of VS3 opens new avenues for research in transition metal trichalcogenides.
The unique structural features and observed properties suggest potential for novel electronic and magnetic applications.