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UV–Vis Spectroscopy: Molecular Electronic Transitions

UV–Vis Spectroscopy: Molecular Electronic Transitions

In Ultraviolet–Visible (UV–Vis) spectroscopy, the absorption of electromagnetic radiation is used to probe the electronic structure of molecules. This technique provides insights into molecular electronic transitions, particularly the movement of electrons between different molecular orbitals. Radiation is absorbed if the energy of the electromagnetic radiation passing through the molecule is precisely equal to the energy difference between the excited and ground states. During this...

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Molecular Spectroscopy: Absorption and Emission

Molecular Spectroscopy: Absorption and Emission

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Atomic Absorption Spectroscopy: Instrumentation

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The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers. Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.

Atomic Absorption Spectroscopy: Lab

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Related Experiment Video

Updated: Nov 21, 2025

Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown

Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown

Published on: February 14, 2014

The diatomic molecular spectroscopy database.

Xiangyue Liu¹, Stefan Truppe¹, Gerard Meijer¹

¹Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany.

Journal of Cheminformatics

|January 12, 2021

Summary

This summary is machine-generated.

A new website offers easy access to spectroscopic constants and Franck-Condon factors for diatomic molecules. This open-access database supports research in astrochemistry, combustion, and ultracold physics.

Keywords:

Franck–Condon factors Laser cooling Molecular spectroscopic constants Open database

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Last Updated: Nov 21, 2025

Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown

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Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy

Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy

Published on: September 17, 2017

Area of Science:

Chemical Physics
Spectroscopy
Computational Chemistry

Background:

Diatomic molecule spectroscopy is vital for astrochemistry, combustion, and ultracold physics.
Existing resources lack easily accessible databases for spectroscopic constants and Franck-Condon factors.
Franck-Condon factors are crucial for assessing laser cooling potential in molecules.

Purpose of the Study:

To develop a user-friendly, open-access website for retrieving diatomic molecule spectroscopic data.
To provide spectroscopic constants and vibrational Franck-Condon factors in accessible formats.
To facilitate data sharing and collaboration within the chemical physics community.

Main Methods:

Developed a website utilizing the LAMP stack (Linux, Apache, MySQL, PHP).
Data includes spectroscopic constants for ground and first excited states.
Website allows user registration and data uploads, licensed under Apache License 2.0.

Main Results:

A functional, data-driven website is now available at https://rios.mp.fhi.mpg.de.
Spectroscopic constants and Franck-Condon factors are retrievable in user-friendly formats.
The platform supports open access and collaborative maintenance of molecular spectroscopic data.

Conclusions:

The developed website provides essential diatomic molecule spectroscopic information efficiently.
This resource aids the chemical physics community in identifying molecules for spectroscopic investigation.
Promotes open data principles and collaborative research in molecular spectroscopy.