Nitrogen Monofluoride Research Articles

Calculated cross sections for electron collisions with NF3, NF2 and NF with applications to remote plasma sources

Electron impact cross sections sets are constructed for the nitrogen trifluoride, nitrogen difluoride and nitrogen monofluoride molecules. These cross sections are based on ab initio R-matrix calculations augmented by other procedures. Cross sections are presented for elastic collisions, momentum transfer, dissociative electron attachment, electron impact dissociation, ionisation and dissociative ionisation. For NF process occurring via the metastable a and b states are also considered. A semi-empirical method of estimating the products of electron impact ionisation is proposed and tested for ammonia. The cross sections are extended to high energy where appropriate. The cross section set constructed is tested in a global model simulation of a low pressure, inductively coupled plasma based on a Ar/NF3/O2 initial gas mixture.

The electric dipole polarity of the ground and low-lying metastable excited states of NF.

NF (nitrogen monofluoride, fluoroimidogen) is isoelectronic with O2, and, like O2, it has a triplet configuration in the ground state, with two low-lying metastable singlet excited states. The dipole moment of the a 1Delta excited state was measured in 1973 to be 0.37 +/- 0.06 D; at the time its polarity was assumed to be normal (i.e., with the negative charge on the fluorine). However, high-level electronic structure calculations, which reproduce with high accuracy the known spectroscopic constants of the ground and excited states of NF, predict a dipole moment of -0.388 D for a 1Delta NF, indicating that, despite the electronegativities, this molecule carries a positive charge on fluorine. The other singlet state is predicted to have an even larger negative dipole moment; the ground-state triplet should have a very small positive moment. Singlet NF resembles in this respect CO and BF, from the N2 isoelectronic series, both of which also have negative dipole moments.

The fluorine atom + isocyanic acid reaction system: a flow reactor source for isocyanate radical(~X2.PI.) and nitrogen monofluoride(X3.SIGMA.-)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe fluorine atom + isocyanic acid reaction system: a flow reactor source for isocyanate radical(~X2.PI.) and nitrogen monofluoride(X3.SIGMA.-)S. Wategaonkar and D. W. SetserCite this: J. Phys. Chem. 1993, 97, 39, 10028–10034Publication Date (Print):September 1, 1993Publication History Published online1 May 2002Published inissue 1 September 1993https://doi.org/10.1021/j100141a022RIGHTS & PERMISSIONSArticle Views50Altmetric-Citations43LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (966 KB) Get e-Alerts

Improved source of nitrogen monofluoride (b1.SIGMA.+) molecules: spectroscopic constants and evidence for E-V energy-transfer reactions with methane and water

A low-power dc discharge in a dilute flow of NF{sub 2} in Ar carrier gas provides a source of NF(b) molecules in the concentration range (2-5) {times} 10{sup 11} molecules cm{sup {minus}3}, which is 20-50 times larger than the concentration from the reaction of Ar({sup 3}P{sub 0,2}) with NF{sub 2} for the same conditions in the flow reactor. The discharge source gives high vibration levels, v{prime} {le} 11, and the NF(b{sup 1}{Sigma}{sup +} {yields} X{sup 3}{Sigma}{sup {minus}}) spectrum had strong bands for the {Delta}v = {plus minus}2 sequences. The extended spectrum from high-v{prime} levels provides improved vibrational constants, {omega}{double prime}{sub e} = 1136.7 {plus minus} 3.3 and {omega}{double prime}{sub e}x{double prime}{sub e} = 8.9 {plus minus} 0.9 cm{sup {minus}1}; {omega}{prime}{sub e} = 1,191.1 {plus minus} 3.7 and {omega}{prime}{sub e}x{prime}{sub e} = 8.2 {plus minus} 1.o cm{sup {minus}1}. The dependence of the NF(b {yields} X) transition dipole upon the {bar r} centroid was assigned as {minus}5.4075 + 9.0695{bar r}-3.2183{bar r}{sup 2} for 1.0 {le} {bar r} {le} 1.8 {angstrom}. The direct observation of NF(a{sup 1}{Delta}) formation from the quenching of NF(b{sup 1}{Sigma}{sup +}) by CH{sub 4} and H{sub 2}O proved that E-V energy transfer is the major channel for NF(b) deactivation.more » The E-V quenching data are consistent with the accepted radiative lifetime of NF(a).« less

A coefficients of the a1.DELTA. states of nitrogen monofluoride and imidogen

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA coefficients of the a1.DELTA. states of nitrogen monofluoride and imidogenGregory R. Bradburn and Harvey V. LilenfeldCite this: J. Phys. Chem. 1991, 95, 2, 555–558Publication Date (Print):January 1, 1991Publication History Published online1 May 2002Published inissue 1 January 1991https://doi.org/10.1021/j100155a013RIGHTS & PERMISSIONSArticle Views27Altmetric-Citations4LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (485 KB) Get e-Alerts

Production of nitrogen (B3.PI.g, v' = 1-12) in the reaction between nitrogen monofluoride(a1.DELTA.) and atomic nitrogen(2D)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProduction of nitrogen (B3.PI.g, v' = 1-12) in the reaction between nitrogen monofluoride(a1.DELTA.) and atomic nitrogen(2D)Steven J. Davis and Lawrence G. PiperCite this: J. Phys. Chem. 1990, 94, 11, 4515–4520Publication Date (Print):May 1, 1990Publication History Published online1 May 2002Published inissue 1 May 1990https://doi.org/10.1021/j100374a032RIGHTS & PERMISSIONSArticle Views30Altmetric-Citations9LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (707 KB) Get e-Alerts

Quenching rate constants of nitrogen monofluoride(a1.DELTA.) at room temperature

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTQuenching rate constants of nitrogen monofluoride(a1.DELTA.) at room temperatureKang Yan. Du and D. W. SetserCite this: J. Phys. Chem. 1990, 94, 6, 2425–2435Publication Date (Print):March 1, 1990Publication History Published online1 May 2002Published inissue 1 March 1990https://doi.org/10.1021/j100369a043RIGHTS & PERMISSIONSArticle Views62Altmetric-Citations32LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (1 MB) Get e-Alerts

Temperature dependence of the electronic-to-vibrational quenching rate constants of nitrogen monofluoride (b1.SIGMA.+)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTemperature dependence of the electronic-to-vibrational quenching rate constants of nitrogen monofluoride (b1.SIGMA.+)X. Y. Bao and D. W. SetserCite this: J. Phys. Chem. 1989, 93, 25, 8162–8170Publication Date (Print):December 1, 1989Publication History Published online1 May 2002Published inissue 1 December 1989https://doi.org/10.1021/j100362a007RIGHTS & PERMISSIONSArticle Views45Altmetric-Citations7LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (1 MB) Get e-Alerts

Direct observation of nitrogen monofluoride(x) using laser-induced fluorescence: kinetics of the (nitrogen monofluoride)3.SIGMA.- ground state

The gas-phase kinetics of the NH(X{sup 3}{Sigma}{sup {minus}}) ground-state radical have been investigated by direct observation. NF(X{sup 3}{Sigma}{sup {minus}}) was produced from the KrF laser photolysis of NF{sub 2} and was directly monitored in the gas-phase by use of laser-induced fluorescence (LIF) via the NF b{sup 1}{Sigma}-X{sup 3}{Sigma}{sup {minus}} transition. The extremely hot nascent NF(X{sup 3}{Sigma}{sup {minus}}) vibrational distribution (T{sub vib} = 2350 K) was exploited to investigate vibrational relaxation with CO{sub 2} and SF{sub 6}. While CO{sub 2} proved to be inefficient for NF(X) vibrational relaxation (k{sub 1-0} = 3.7 {times} 10{sup {minus}14} cm{sup 3}/(molecule{center dot}s)), SF{sub 6} is a rapid quencher (k{sub 1-0} = 1.2 {times} 10{sup {minus}12} cm{sup 3}/(molecule{center dot}s)). Information on rotational relaxation of NF(X{sup 3}{Sigma}{sup {minus}}) was also obtained. The NF ground state is seen to be removed by reaction with NF{sub 2} with a rate coefficient of 2.0 {times} 10{sup {minus}12} cm{sup 3}/(molecules{center dot}s). The NF(X) + NF(X) {yields} N{sub 2} + 2F rate coefficient is estimated to be < 5 {times} 10{sup {minus}12} cm{sup 3}/(molecule{center dot}s), much slower than previously thought.

Direct observation of nitrogen monofluoride(x) using laser-induced fluorescence: determination of the hydrogen atom + nitrogen difluoride branching ratio

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDirect observation of nitrogen monofluoride(x) using laser-induced fluorescence: determination of the hydrogen atom + nitrogen difluoride branching ratioR. F. Heidner III, Henry Helvajian, J. S. Holloway, and J. Brooke KoffendCite this: J. Phys. Chem. 1989, 93, 23, 7818–7823Publication Date (Print):November 1, 1989Publication History Published online1 May 2002Published inissue 1 November 1989https://doi.org/10.1021/j100360a019RIGHTS & PERMISSIONSArticle Views36Altmetric-Citations6LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (723 KB) Get e-Alerts

Production of nitrogen monofluoride (a1.DELTA.) by dissociation of fluorine azide

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProduction of nitrogen monofluoride (a1.DELTA.) by dissociation of fluorine azideD. J. Benard, B. K. Winker, T. A. Seder, and R. H. CohnCite this: J. Phys. Chem. 1989, 93, 12, 4790–4796Publication Date (Print):June 1, 1989Publication History Published online1 May 2002Published inissue 1 June 1989https://doi.org/10.1021/j100349a022RIGHTS & PERMISSIONSArticle Views72Altmetric-Citations22LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (977 KB) Get e-Alerts

Vibrational to electronic energy transfer from hydrogen fluoride(v = 2,3) to nitrogen monofluoride(a1.DELTA.)

Observation de l'excitation de NF(b 1 Σ + ) par une reaction de transfert d'energie entre HF(v=2,3) et NF(a 1 Δ). Determination d'une constante de vitesse pour le transfert d'energie vibrationnel-electronique

Mechanism of Difluoroamine Deaminations

An alternative explanation of the reductive deamination with difluoroamine is suggested which does not involve the originally proposed formation of nitrogen monofluoride and Wolff-Kishner cleavage. The reductive deamination of amines by difluoroamine has been discussed in terms of intermediate formation of nitrogen monofluoride [1, 2]. Some steps in the proposed mechanism seem questionable and hence an alternative view of the reaction is presented. Bumgardner put forward a five step reaction scheme. The initial step was a proton transfer between difluoroamine and a more basic primary amine to form a salt with the difluoronitrogen (I) anion. This salt decomposed in a rate determining step to produce nitrogen monofluoride which inserted rapidly into the N-H bond of HNF 2. The product eliminated hydrogen fluoride with further amine to form a di-imine, which then extruded dinitrogen and left the alkane. The overall stoichiometry accords with. 3RNH 2 + HNF 2 = RN = NH + 2RN 3 + F - (1) There is only indirect evidence for the intermediacy of a fluoronitrene (NF) in reactions, based mainly on reaction products and their stereochemistry. Le Noble [3] inferred such an intermediate in the alkaline decomposition of HNF 2 from a large positive volume of activation obtained from the pressure variation of rate. The suggested rate determining step was NF 2 -aq → NFg + F - aq Even if this were the only explanation of a larger transition state, one has to transfer a mechanism obtained using a fully dissociated base in an aqueous medium to a relatively weak base in a non-aqueous medium.

The fluorine atom + hydrazoic acid system: a chemical source for nitrogen monofluoride(a1.DELTA.)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe fluorine atom + hydrazoic acid system: a chemical source for nitrogen monofluoride(a1.DELTA.)J. Habdas, S. Wategaonkar, and D. W. SetserCite this: J. Phys. Chem. 1987, 91, 2, 451–458Publication Date (Print):January 1, 1987Publication History Published online1 May 2002Published inissue 1 January 1987https://doi.org/10.1021/j100286a039RIGHTS & PERMISSIONSArticle Views58Altmetric-Citations42LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (1 MB) Get e-Alerts