The 193nm photolysis of NO2:: NO(v) vibrational distribution, O(1D) quantum yield and emission from vibrationally excited NO2

被引：25

作者：

Hancock, G ^{[1
]}

Morrison, M ^{[1
]}

机构：

[1] Univ Oxford, Phys & Theoret Chem Lab, Oxford OX1 3QZ, England

来源：

MOLECULAR PHYSICS | 2005年 / 103卷 / 13期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1080/00268970500086161

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Time resolved Fourier transform infrared emission has been used to study the photolysis of NO2 and its dimer N2O4 at 193 nm. NO(nu) populations from the photolysis of NO2 show a bimodal distribution, peaking at similar to 5 and with a subsidiary maximum at similar to 14, close to the energetically allowed limit. The results are discussed in terms of previous measurements near this photolysis wavelength of the kinetic energies of the two possible O atomic fragments, O(P-3) and O(D-1), and on the electronic states of the parent molecule which can be populated. The O(D-1) yield has been measured as 0.51 +/- 0.04, in good agreement with previously reported values. Emission from vibrationally excited NO2 arises from the dissociation of N2O4 and is similar to that observed from photolysis at 248 nm.

引用

页码：1727 / 1733

页数：7

共 32 条

[1]

Ahmed M, 2001, ATOMIC AND MOLECULAR BEAMS: THE STATE OF THE ART 2000, P343

[2] Coherence in polyatomic photodissociation:: Aligned O(3P) from photodissociation of NO2 at 212.8 nm [J].

Ahmed, M ;

Peterka, DS ;

Bracker, AS ;

Vasyutinskii, OS ;

Suits, AG .

JOURNAL OF CHEMICAL PHYSICS, 1999, 110 (09) :4115-4118

[3] Absolute oscillator strengths for the valence-shell photoabsorption (2-200 eV) and the molecular and dissociative photoionization (11-80 eV) of nitrogen dioxide [J].

Au, JW ;

Brion, CE .

CHEMICAL PHYSICS, 1997, 218 (1-2) :109-126

[4] EXTINCTION COEFFICIENTS OF NO2 AND N2O4 [J].

BASS, AM ;

LEDFORD, AE ;

LAUFER, AH .

JOURNAL OF RESEARCH OF THE NATIONAL BUREAU OF STANDARDS SECTION A-PHYSICS AND CHEMISTRY, 1976, 80 (02) :143-166

[5] THE ROLE OF NEAR-RESONANT INTERMEDIATE STATES IN THE 2-PHOTON EXCITATION OF NO2 - THE DISTINCT DYNAMICS OF 2-PHOTON PHOTOFRAGMENTATION [J].

BIGIO, L ;

TAPPER, RS ;

GRANT, ER .

JOURNAL OF PHYSICAL CHEMISTRY, 1984, 88 (07) :1271-1273

[6] Vibrational relaxation of NO(ν=1-3) and NO2(0,0,1) with atmospheric gases [J].

Bohn, B ;

Doughty, A ;

Hancock, G ;

Moore, EL ;

Morrell, C .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 1999, 1 (08) :1833-1842

[7]

Chao J., 1974, Thermochim. Acta, V10, P359

[8] 2491-A ABSORPTION SYSTEM OF NO2 AND A DOUBLE-MINIMUM POTENTIAL [J].

COON, JB ;

CESANI, FA ;

HUBERMAN, FP .

JOURNAL OF CHEMICAL PHYSICS, 1970, 52 (04) :1647-&

[9]

DeMore W.B., 1997, JPL PUBLICATION, P97

[10]

GONG VC, 2001, AM CHEM SOC AUG 22

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