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High-resolution spectroscopy of buffer-gas-cooled phthalocyanine.

Yuki Miyamoto¹, Reo Tobaru², Yuiki Takahashi³

¹Research Institute for Interdisciplinary Science, Okayama University, Kita-ku, Okayama, Japan. miyamo-y@okayama-u.ac.jp.

Communications Chemistry

|January 25, 2023

Summary

Buffer-gas cooling enables high-resolution rovibronic spectroscopy for large molecules like free-base phthalocyanine. This breakthrough advances understanding of molecular quantum properties and aids quantum chemical calculations.

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Area of Science:

Chemical Physics
Physical Chemistry
Molecular Spectroscopy

Background:

Historically, quantum property studies focused on small molecules due to limitations in preparing cold samples.
High-resolution rovibronic spectroscopy was previously restricted to simpler molecular systems.

Purpose of the Study:

To present high-resolution rovibronic spectroscopy results for large gas-phase molecules.
To demonstrate the utility of buffer-gas cooling for large molecule spectroscopy.
To guide future quantum chemical calculations for complex molecules.

Main Methods:

High-resolution rovibronic spectroscopy.
Laser ablation sample introduction.
Buffer-gas cooling technique.

Main Results:

Successful application of high-resolution rovibronic spectroscopy to free-base phthalocyanine (FBPc), a large molecule.
Demonstration that buffer-gas cooling is effective for preparing translationally and rotationally cold large molecules.
Acquisition of detailed spectral data for FBPc.

Conclusions:

Buffer-gas cooling is a viable method for studying large molecules with high-resolution spectroscopy.
This technique expands the scope of molecular quantum property investigations.
The results provide a foundation for advanced quantum chemical calculations on complex molecular systems.