Photodissociation of HNO3 at 193 nm: Near-infrared emission of NO detected by time-resolved Fourier transform spectroscopy

Pey Shiun Yeh; Gen Hou Leu; Yuan-Pern Lee; I. Chia Chen

doi:10.1063/1.470623

Photodissociation of HNO₃ at 193 nm: Near-infrared emission of NO detected by time-resolved Fourier transform spectroscopy

Pey Shiun Yeh, Gen Hou Leu, Yuan-Pern Lee, I. Chia Chen^*

^*Corresponding author for this work

Department of Applied Chemistry

Research output: Contribution to journal › Article › peer-review

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Abstract

Rotationally resolved emission of NO, produced from photolysis of HNO ₃ at 193 nm, in the near infrared region (8900-9300 cm^-1) was recorded with a step-scan Fourier-transform interferometer at a resolution of 0.1 cm^-1. The emission is assigned as NO D ²Σ-A ²Σ⁺ (v′ ,v″) = (0,0) band with rotational states N′=17-42. Emission from selective rotational states of NO D ²Σ⁺ was observed when HNO₃ was photolyzed with an ArF excimer laser having a narrow bandwidth ≈0.01 nm. The experimental results indicate that the D ²Σ⁺ state of NO is formed via absorption of another 193 nm photon by NO (v″=1) in the ground electronic state. The measured distribution of intensity implies that NO is produced highly rotationally excited; the most likely mechanism for formation of NO is from the unstable NO₂ fragment undergoing secondary dissociation.

Original language	English
Pages (from-to)	4879-4886
Number of pages	8
Journal	The Journal of chemical physics
Volume	103
Issue number	12
DOIs	https://doi.org/10.1063/1.470623
State	Published - Sep 1995

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@article{eac7deda380b4f2984582ba96f13da4f,

title = "Photodissociation of HNO3 at 193 nm: Near-infrared emission of NO detected by time-resolved Fourier transform spectroscopy",

abstract = "Rotationally resolved emission of NO, produced from photolysis of HNO 3 at 193 nm, in the near infrared region (8900-9300 cm-1) was recorded with a step-scan Fourier-transform interferometer at a resolution of 0.1 cm-1. The emission is assigned as NO D 2Σ-A 2Σ+ (v′ ,v″) = (0,0) band with rotational states N′=17-42. Emission from selective rotational states of NO D 2Σ+ was observed when HNO3 was photolyzed with an ArF excimer laser having a narrow bandwidth ≈0.01 nm. The experimental results indicate that the D 2Σ+ state of NO is formed via absorption of another 193 nm photon by NO (v″=1) in the ground electronic state. The measured distribution of intensity implies that NO is produced highly rotationally excited; the most likely mechanism for formation of NO is from the unstable NO2 fragment undergoing secondary dissociation.",

author = "Yeh, {Pey Shiun} and Leu, {Gen Hou} and Yuan-Pern Lee and Chen, {I. Chia}",

year = "1995",

month = sep,

doi = "10.1063/1.470623",

language = "English",

volume = "103",

pages = "4879--4886",

journal = "The Journal of chemical physics",

issn = "0021-9606",

publisher = "American Institute of Physics",

number = "12",

}

TY - JOUR

T1 - Photodissociation of HNO3 at 193 nm

T2 - Near-infrared emission of NO detected by time-resolved Fourier transform spectroscopy

AU - Yeh, Pey Shiun

AU - Leu, Gen Hou

AU - Lee, Yuan-Pern

AU - Chen, I. Chia

PY - 1995/9

Y1 - 1995/9

N2 - Rotationally resolved emission of NO, produced from photolysis of HNO 3 at 193 nm, in the near infrared region (8900-9300 cm-1) was recorded with a step-scan Fourier-transform interferometer at a resolution of 0.1 cm-1. The emission is assigned as NO D 2Σ-A 2Σ+ (v′ ,v″) = (0,0) band with rotational states N′=17-42. Emission from selective rotational states of NO D 2Σ+ was observed when HNO3 was photolyzed with an ArF excimer laser having a narrow bandwidth ≈0.01 nm. The experimental results indicate that the D 2Σ+ state of NO is formed via absorption of another 193 nm photon by NO (v″=1) in the ground electronic state. The measured distribution of intensity implies that NO is produced highly rotationally excited; the most likely mechanism for formation of NO is from the unstable NO2 fragment undergoing secondary dissociation.

AB - Rotationally resolved emission of NO, produced from photolysis of HNO 3 at 193 nm, in the near infrared region (8900-9300 cm-1) was recorded with a step-scan Fourier-transform interferometer at a resolution of 0.1 cm-1. The emission is assigned as NO D 2Σ-A 2Σ+ (v′ ,v″) = (0,0) band with rotational states N′=17-42. Emission from selective rotational states of NO D 2Σ+ was observed when HNO3 was photolyzed with an ArF excimer laser having a narrow bandwidth ≈0.01 nm. The experimental results indicate that the D 2Σ+ state of NO is formed via absorption of another 193 nm photon by NO (v″=1) in the ground electronic state. The measured distribution of intensity implies that NO is produced highly rotationally excited; the most likely mechanism for formation of NO is from the unstable NO2 fragment undergoing secondary dissociation.

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U2 - 10.1063/1.470623

DO - 10.1063/1.470623

M3 - Article

AN - SCOPUS:0000317157

SN - 0021-9606

VL - 103

SP - 4879

EP - 4886

JO - The Journal of chemical physics

JF - The Journal of chemical physics

IS - 12

ER -

Photodissociation of HNO₃ at 193 nm: Near-infrared emission of NO detected by time-resolved Fourier transform spectroscopy

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