Assessment of vibrational-translational relaxation dynamics of in a wet-nitrogen matrix through QEPAS

Here we report on a study of the non-radiative relaxation dynamic of (12)CH(4) and (13)CH(4) in wet nitrogen-based matrixes by using the quartz-enhanced photoacoustic spectroscopy (QEPAS) technique. The dependence of the QEPAS signal on pressure at fixed matrix composition and on H(2)O concentration...

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Autores principales: Olivieri, Mariagrazia, Giglio, Marilena, Dello Russo, Stefano, Menduni, Giansergio, Zifarelli, Andrea, Patimisco, Pietro, Sampaolo, Angelo, Wu, Hongpeng, Dong, Lei, Spagnolo, Vincenzo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2023
Materias:
Research Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10265511/
https://www.ncbi.nlm.nih.gov/pubmed/37325395
http://dx.doi.org/10.1016/j.pacs.2023.100518
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author Olivieri, Mariagrazia
Giglio, Marilena
Dello Russo, Stefano
Menduni, Giansergio
Zifarelli, Andrea
Patimisco, Pietro
Sampaolo, Angelo
Wu, Hongpeng
Dong, Lei
Spagnolo, Vincenzo
author_facet Olivieri, Mariagrazia
Giglio, Marilena
Dello Russo, Stefano
Menduni, Giansergio
Zifarelli, Andrea
Patimisco, Pietro
Sampaolo, Angelo
Wu, Hongpeng
Dong, Lei
Spagnolo, Vincenzo
author_sort Olivieri, Mariagrazia
collection PubMed
description Here we report on a study of the non-radiative relaxation dynamic of (12)CH(4) and (13)CH(4) in wet nitrogen-based matrixes by using the quartz-enhanced photoacoustic spectroscopy (QEPAS) technique. The dependence of the QEPAS signal on pressure at fixed matrix composition and on H(2)O concentration at fixed pressure was investigated. We demonstrated that QEPAS measurements can be used to retrieve both the effective relaxation rate in the matrix, and the V-T relaxation rate associated to collisions with nitrogen and water vapor. No significant differences in measured relaxation rates were observed between the two isotopologues.
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spelling pubmed-102655112023-06-15 Assessment of vibrational-translational relaxation dynamics of in a wet-nitrogen matrix through QEPAS Olivieri, Mariagrazia Giglio, Marilena Dello Russo, Stefano Menduni, Giansergio Zifarelli, Andrea Patimisco, Pietro Sampaolo, Angelo Wu, Hongpeng Dong, Lei Spagnolo, Vincenzo Photoacoustics Research Article Here we report on a study of the non-radiative relaxation dynamic of (12)CH(4) and (13)CH(4) in wet nitrogen-based matrixes by using the quartz-enhanced photoacoustic spectroscopy (QEPAS) technique. The dependence of the QEPAS signal on pressure at fixed matrix composition and on H(2)O concentration at fixed pressure was investigated. We demonstrated that QEPAS measurements can be used to retrieve both the effective relaxation rate in the matrix, and the V-T relaxation rate associated to collisions with nitrogen and water vapor. No significant differences in measured relaxation rates were observed between the two isotopologues. Elsevier 2023-06-02 /pmc/articles/PMC10265511/ /pubmed/37325395 http://dx.doi.org/10.1016/j.pacs.2023.100518 Text en © 2023 The Authors https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Research Article
Olivieri, Mariagrazia
Giglio, Marilena
Dello Russo, Stefano
Menduni, Giansergio
Zifarelli, Andrea
Patimisco, Pietro
Sampaolo, Angelo
Wu, Hongpeng
Dong, Lei
Spagnolo, Vincenzo
Assessment of vibrational-translational relaxation dynamics of in a wet-nitrogen matrix through QEPAS
title Assessment of vibrational-translational relaxation dynamics of in a wet-nitrogen matrix through QEPAS
title_full Assessment of vibrational-translational relaxation dynamics of in a wet-nitrogen matrix through QEPAS
title_fullStr Assessment of vibrational-translational relaxation dynamics of in a wet-nitrogen matrix through QEPAS
title_full_unstemmed Assessment of vibrational-translational relaxation dynamics of in a wet-nitrogen matrix through QEPAS
title_short Assessment of vibrational-translational relaxation dynamics of in a wet-nitrogen matrix through QEPAS
title_sort assessment of vibrational-translational relaxation dynamics of in a wet-nitrogen matrix through qepas
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10265511/
https://www.ncbi.nlm.nih.gov/pubmed/37325395
http://dx.doi.org/10.1016/j.pacs.2023.100518
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