Infrared spectrum of matrix-isolated nitric acid

Guillory, William A.; Bernstein, Mark L.

doi:10.1063/1.430519

Cited by 63 publications

(37 citation statements)

References 17 publications

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“…Further annealing to 170 K causes reaction to occur and leads to the complete loss of all absorptions due to covalent N20 s and water-ice. As shown in trace E, the resulting film consists mainly of polycrystalline nitronium nitrate and molecular nitric acid(1685, 1326, 967, and 778cm -1)[Guillory and Bernstein, 1975]. The results of annealing a mixed H20/N20 5 film with 3RAIR spectra of a 1/1 mixture of H20/N205 at 80 K (trace A) and after annealing to 125 K (trace B), 140 K (trace C), 155 K (trace D), and 170 K (trace E).…”

supporting

confidence: 63%

Mechanisms for the heterogeneous hydrolysis of hydrogen chloride, chlorine nitrate and dinitrogen pentoxide on water‐rich atmospheric particle surfaces

Koch¹,

Banham²,

Sodeau³

et al. 1997

J. Geophys. Res.

124

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Abstract. The heterogeneous interaction of the stratospheric reservoir species HC1, C1ONO2, and N20 s with water-rich polar stratospheric particle mimics is characterized by the formation of solvated ionic products. Simple semiempirical calculations have been used to explain the nature of the species observed in infrared spectroscopic measurements and to elucidate the mechanism by which they are formed. The initial stages of the interaction appear to involve an SN2-type nucleophilic attack by the oxygen atom of the surface water molecule upon the most accessible electrophilic site of the adsorbing reactant. Mechanistic schemes involving protonated acid intermediates and their subsequent decomposition or hydrolysis can be used to accurately predict and explain the stable reaction products observed spectroscopically under stratospheric conditions.

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supporting

confidence: 63%

Mechanisms for the heterogeneous hydrolysis of hydrogen chloride, chlorine nitrate and dinitrogen pentoxide on water‐rich atmospheric particle surfaces

Koch¹,

Banham²,

Sodeau³

et al. 1997

J. Geophys. Res.

124

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“…vapour or isolated / monomer, the frequencies have their lowest values; they increase as soon as hydrogen bonding occurs either as HN0,---HNO, or H20---HNO,. Comparison of the frequencies of the nitric acid dimer versus the monohydrate complex, and for the liquid (10, 11, 13) versus solutions also indicates that the hydrogen bonding between HNO, and H20 and/or (Ha,)+ is stronger than to other HNO, molecules; see (13) originally interchanged the labelling of the two modes, but the current labelling was later shown to be correct (16) . FIG.…”

Section: Resultsmentioning

confidence: 96%

Vibrational spectral studies of solutions at elevated temperatures and pressures. VII. Raman spectra and dissociation of nitric acid

Ratcliffe¹,

Irish²

1985

Can. J. Chem.

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An exploratory study of the Raman spectra of nitric acid solutions up to 250 °C has been undertaken. The decrease in the frequencies of the νN—(OH) and δNO2 bands of HNO3 as temperature and concentration increase have been interpreted in terms of the reduced strength of hydrogen bonding. Approximate values of the degree of dissociation α have been determined and show that nitric acid is a very much weaker acid at high temperatures.

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“…Moreover its formation in the gas phase through reaction between HO 2 and NO has also been investigated experimentally as well as theoretically and the effect of water vapour on such a reactivity has further been discussed (Butkovskaya et al 2005, 2009). Additionally, infrared study of gaseous and condensed nitric acid has been reported by several groups (McGraw, Bernitt & Hisatsune 1965; Guillory & Bernstein 1975; Chen et al 1992). The hydrated nitric acid has also been studied experimentally under upper tropospheric conditions (Zondlo, Barone & Tolbert 1997).…”

Section: Introductionmentioning

confidence: 93%

The NO and non-energetic OH radical reactivity: characterization and reaction scheme

Joshi

Zins

Krim

2011

Monthly Notices of the Royal Astronomical Society

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The solid phase reaction between NO and non‐energetic OH radicals was investigated using helium as a dilution medium at 3 K. The species generated were characterized by in situ Fourier transform infrared (FTIR) spectroscopy. The choice of solid phase experiment was motivated by its potential applications in the field of atmospheric chemistry and astrochemistry. Unfortunately, under such conditions, broad absorption bands with overlapping features are observed, and as a consequence, the assignment of each signal to the newly formed specie is risky. This is the reason why, in order to attribute all the absorption bands observed in the solid phase FTIR spectra, similar experiments were carried out by replacing the dilution medium with neon whereas other experimental parameters were retained. As a result, all produced species are trapped in neon matrix showing narrow peaks so the elucidation of spectral signals is simple. Furthermore, the correlation of the spectra in solid phase and in neon matrix helps to avoid the intricacies in understanding the spectrum observed in solid phase reactivity. This approach allowed us to characterize the formation of nitrous acid (HONO), nitrogen dioxide (NO2), nitrosyl hydride (HNO), nitric acid (HNO3), nitrous oxide (N2O) and ozone (O3). The concentration effect of reagents on the end products was also investigated. Based on these experimental results, reaction pathways are proposed to explain the formation of all the observed products.

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Infrared spectrum of matrix-isolated nitric acid

Cited by 63 publications

References 17 publications

Mechanisms for the heterogeneous hydrolysis of hydrogen chloride, chlorine nitrate and dinitrogen pentoxide on water‐rich atmospheric particle surfaces

Mechanisms for the heterogeneous hydrolysis of hydrogen chloride, chlorine nitrate and dinitrogen pentoxide on water‐rich atmospheric particle surfaces

Vibrational spectral studies of solutions at elevated temperatures and pressures. VII. Raman spectra and dissociation of nitric acid

The NO and non-energetic OH radical reactivity: characterization and reaction scheme

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