Séminaire du laboratoire PhLAM : Celina BERMUDEZ (GEPECS Group), Elias NEEMAN Laboratoire PhLAM) Exploring Light-Matter Interactions: Unveiling Physicochemical Traits in the Atmosphere, Interstellar Medium, and Biomolecules

Dr. Celina BERMUDEZ (GEPECS Group, Universidad de Valladolid. Espagne), Dr. Elias NEEMAN (Laboratoire PhLAM, Université de Lille)

Titre:  Exploring Light-Matter Interactions: Unveiling Physicochemical Traits in the Atmosphere, Interstellar Medium, and Biomolecules

Résumé:

The exploration of light-matter interactions within the field of spectroscopy has led to a plethora of applications, depending on the frequency of the radiation employed. In this talk, our focus is on rotational spectroscopy, operating within centimeter to millimeter/submillimeter wavelengths, exploring the emission/absorption of radiation induced by molecular rotation. Rotational spectroscopy has been proved to be a pivotal technique with a direct application in astrophysics, atmospheric science, and biomolecular studies. In the domain of astrophysics, it serves as an invaluable tool, providing empirical support for molecule detection in the interstellar medium (ISM). This method not only aids in identifying new molecules but also reveals vibrational excited states of those already known, offering insights into their environmental contexts, and enabling the study of unstable species.

Within atmospheric science, rotational spectra analysis provides a means to comprehend the complexation processes of key pollutants with other atmospheric species, contributing to the formation of secondary organic aerosols (SOAs) and detection of reaction intermediate species. Additionally, for tracking chemical pollutant abundance through vibrational spectroscopy, a precise understanding of spectroscopic parameters in the ground state, mainly accessible through rotational spectroscopy, becomes essential.

In biochemistry, it is of utmost importance to understand the structure of biomolecules in order to comprehend their functionality. Rotational spectroscopy uniquely provides insights into molecular structure, including conformational behavior. The inter- and intramolecular interactions revealed by this technique are crucial for understanding biomolecular behavior, the connection between biomolecules and their receptors, as well as the structural properties of macromolecules such as proteins and DNA.

In rotational spectroscopy, as a continuously evolving field, recent advances in broadband techniques open new applications, like acting as a probe for chemical reactivity and or as a detector for chemical mixtures. In this presentation, we will provide an overview of these rotational spectroscopy applications, discuss state-of-the-art techniques, and explore its future prospects.

Lien pour s'inscrire: https://evento.renater.fr/survey/15-12-seminaire-du-laboratoire-et-repas-de-fin-d-annee-1csssgnv