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Infrared Laser Velocity Modulation Spectroscopy of SiCl+(X1Sigma+) up to v = 6

Fan¹, Liu, Davies

¹Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, United Kingdom

Journal of Molecular Spectroscopy

|December 16, 1998

Summary

This study detected fundamental and hot band absorption lines for silicon chloride cations (SiCl+) using diode laser velocity modulation spectroscopy. Precise spectroscopic constants and molecular properties were determined for various isotopologues.

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Area of Science:

Molecular Spectroscopy
Physical Chemistry
Computational Chemistry

Background:

Silicon chloride cations (SiCl+) are important in various chemical processes.
Accurate spectroscopic data is crucial for understanding molecular properties and reactions.

Purpose of the Study:

To detect and analyze the absorption lines of SiCl+ isotopologues.
To determine precise spectroscopic constants and molecular parameters for SiCl+.

Main Methods:

Diode laser velocity modulation spectroscopy was employed.
Absorption lines were detected in the 630–700 cm−1 range.
Data was fitted using mass-independent coefficients.

Main Results:

Fundamental and hot band absorption lines of 28Si35Cl+, 28Si37Cl+, 29Si35Cl+, and 30Si35Cl+ were identified.
Spectroscopic constants (ωe, Be) and equilibrium internuclear distance (re) for 28Si35Cl+ were derived.
Equilibrium dissociation energy (De) was calculated using Dunham's expanded Morse potential.

Conclusions:

The study provides valuable spectroscopic data for SiCl+ isotopologues.
The determined molecular constants contribute to a better understanding of SiCl+ properties.
This research advances the field of molecular spectroscopy for ionic species.