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Thermal reaction and luminescence of long-lived N (2)D in N(2) ice
Photochemistry of an N(2) ice and thermal reaction of the irradiated sample were studied with vacuum-ultraviolet (VUV) light from a synchrotron. Concurrent detection of infrared absorption and visible emission spectra provide evidence for the generation of energetic products N ((2)D) and N ((2)P) at...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
National Academy of Sciences
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6900521/ https://www.ncbi.nlm.nih.gov/pubmed/31732669 http://dx.doi.org/10.1073/pnas.1910647116 |
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author | Lo, Jen-Iu Chou, Sheng-Lung Peng, Yu-Chain Lu, Hsiao-Chi Cheng, Bing-Ming |
author_facet | Lo, Jen-Iu Chou, Sheng-Lung Peng, Yu-Chain Lu, Hsiao-Chi Cheng, Bing-Ming |
author_sort | Lo, Jen-Iu |
collection | PubMed |
description | Photochemistry of an N(2) ice and thermal reaction of the irradiated sample were studied with vacuum-ultraviolet (VUV) light from a synchrotron. Concurrent detection of infrared absorption and visible emission spectra provide evidence for the generation of energetic products N ((2)D) and N ((2)P) atoms, N(2) (A) molecule and linear-N(3) (l-N(3)) radical after excitation of icy N(2) at 121.6 nm. Irradiation at 190 nm is shown to be an effective way to eliminate the l-N(3) radical. After the photolysis and photoelimination of the l-N(3), we initiate synthesis of l-N(3) via the thermal ramping of the sample in temperature range 3.5 to 20 K. In addition, the emission from the N ((2)D) atom was observed during the thermal ramping process. These behaviors indicate that a long-lived N ((2)D(long)) atom is generated in the VUV-photolyzed N(2) ice. A comparison of the variations of the visible emission of N ((2)D) and the infrared absorption of l-N(3) with time indicates that the long-lived N ((2)D(long)) dominated the thermal synthesis of l-N(3). The results have enhanced suggestion and understanding of the conversion for nitrogen species in cold astrophysical environments with VUV irradiation. |
format | Online Article Text |
id | pubmed-6900521 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | National Academy of Sciences |
record_format | MEDLINE/PubMed |
spelling | pubmed-69005212019-12-12 Thermal reaction and luminescence of long-lived N (2)D in N(2) ice Lo, Jen-Iu Chou, Sheng-Lung Peng, Yu-Chain Lu, Hsiao-Chi Cheng, Bing-Ming Proc Natl Acad Sci U S A Physical Sciences Photochemistry of an N(2) ice and thermal reaction of the irradiated sample were studied with vacuum-ultraviolet (VUV) light from a synchrotron. Concurrent detection of infrared absorption and visible emission spectra provide evidence for the generation of energetic products N ((2)D) and N ((2)P) atoms, N(2) (A) molecule and linear-N(3) (l-N(3)) radical after excitation of icy N(2) at 121.6 nm. Irradiation at 190 nm is shown to be an effective way to eliminate the l-N(3) radical. After the photolysis and photoelimination of the l-N(3), we initiate synthesis of l-N(3) via the thermal ramping of the sample in temperature range 3.5 to 20 K. In addition, the emission from the N ((2)D) atom was observed during the thermal ramping process. These behaviors indicate that a long-lived N ((2)D(long)) atom is generated in the VUV-photolyzed N(2) ice. A comparison of the variations of the visible emission of N ((2)D) and the infrared absorption of l-N(3) with time indicates that the long-lived N ((2)D(long)) dominated the thermal synthesis of l-N(3). The results have enhanced suggestion and understanding of the conversion for nitrogen species in cold astrophysical environments with VUV irradiation. National Academy of Sciences 2019-12-03 2019-11-15 /pmc/articles/PMC6900521/ /pubmed/31732669 http://dx.doi.org/10.1073/pnas.1910647116 Text en Copyright © 2019 the Author(s). Published by PNAS. https://creativecommons.org/licenses/by-nc-nd/4.0/ https://creativecommons.org/licenses/by-nc-nd/4.0/This open access article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND) (https://creativecommons.org/licenses/by-nc-nd/4.0/) . |
spellingShingle | Physical Sciences Lo, Jen-Iu Chou, Sheng-Lung Peng, Yu-Chain Lu, Hsiao-Chi Cheng, Bing-Ming Thermal reaction and luminescence of long-lived N (2)D in N(2) ice |
title | Thermal reaction and luminescence of long-lived N (2)D in N(2) ice |
title_full | Thermal reaction and luminescence of long-lived N (2)D in N(2) ice |
title_fullStr | Thermal reaction and luminescence of long-lived N (2)D in N(2) ice |
title_full_unstemmed | Thermal reaction and luminescence of long-lived N (2)D in N(2) ice |
title_short | Thermal reaction and luminescence of long-lived N (2)D in N(2) ice |
title_sort | thermal reaction and luminescence of long-lived n (2)d in n(2) ice |
topic | Physical Sciences |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6900521/ https://www.ncbi.nlm.nih.gov/pubmed/31732669 http://dx.doi.org/10.1073/pnas.1910647116 |
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