The Infrared and Near-Infrared Spectra of HCC and DCC Trapped in Solid Neon

Forney, Daniel; Jacox, Marilyn E.; Thompson, Warren E.

doi:10.1006/jmsp.1995.1065

Cited by 94 publications

(76 citation statements)

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“…HFCC is another candidate for this absorption; however, the observed bands remain practically unchanged after deuteration, which makes this assignment improbable. A number of other broad and less intense absorptions are seen in the spectra, probably belonging to different radicals (including CCH 37 and CCF) and ionic species. The best yield of the key products was obtained with Xe lamp photolysis.…”

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confidence: 99%

Matrix-Isolation and ab Initio Study of HNgCCF and HCCNgF Molecules (Ng = Ar, Kr, and Xe)

et al. 2010

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We report three new noble-gas molecules prepared in low-temperature Kr and Xe matrices from the HCCF precursor by UV photolysis and thermal annealing. The identified molecules are two noble-gas hydrides HNgCCF (Ng ) Kr and Xe) and a molecule of another type, HCCKrF. These molecules are assigned with the help of ab initio calculations. All strong absorptions predicted by theory are found in experiments with proper deuteration shifts. The experiments and theory suggest a higher stability against dissociation of HNgCCF molecules compared to HNgCCH reported previously. Surprisingly, only very tentative traces of HCCXeF, which is computationally very stable, are found in experiments. No strong evidence of similar argon compounds is found here.

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confidence: 99%

Matrix-Isolation and ab Initio Study of HNgCCF and HCCNgF Molecules (Ng = Ar, Kr, and Xe)

et al. 2010

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“…Initial spectroscopic searches for the strong bands observed in the low temperature matrix spectrum 45 and predicted by Tarroni and Carter 44 were carried out by photolysis of a slowly flowing sample of CF 3 C 2 H in Ar at 193 nm. Transient absorption bands presumed to be due to C 2 H were detected throughout the search region.…”

Section: Resultsmentioning

confidence: 99%

“…Additional bands of C 2 H in the 4250−4550 cm −1 region have very recently been analyzed in a Fourier transform emission spectrum, and a band near 6340 cm −1 has been characterized by diode laser spectroscopy in a concentration modulated discharge source. 52 Both the calculations 44 and matrix spectrum 45 show that the most intense bands in the entire infrared and near-infrared spectra of the radical lie around 7100 cm −1 or 1.4 µm. The vibronic levels at this energy are strongly mixed, but derive much of their intensity from the near-vertical transition to the A (0,0,2) state, in a region of spectrum where no gas phase spectra have yet been reported.…”

Section: Introductionmentioning

confidence: 99%

The near-infrared spectrum of ethynyl radical

Hall

Sears

2016

J. Chem. Phys.

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Transient diode laser absorption spectroscopy has been used to measure three strong vibronic bands in the near infrared spectrum of the C 2 H, ethynyl, radical not previously observed in the gas phase. The radical was produced by ultraviolet excimer laser photolysis of either acetylene or (1,1,1)-trifluoropropyne in a slowly flowing sample of the precursor diluted in inert gas, and the spectral resolution was Doppler- (2004)), the vibronic character of these levels was also assigned. The observed states contain both X 2 Σ + and A 2 Π electronic character. Several local rotational level perturbations were observed in the excited states. Kinetic measurements of the time-evolution of the ground state populations following collisional relaxation and reactive loss of the radicals formed in a hot, nonthermal, population distribution were made using some of the strong rotational lines observed. The case of C 2 H may be a good place to investigate the behavior at intermediate pressures of inert colliders, where the competition between relaxation and reaction can be tuned and observed to compare with master equation models, rather than deliberately suppressed to measure thermal rate constants.

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“…The linear three sion in earlier studies (1). However, Jacox et al (7) sugatomic C 2 D radical has an electronic X 2 …”

Section: Introductionmentioning

confidence: 98%

“…The only experimentally detrum, including millimeter-wave and sub-millimeter-wave rived result of 270 { 20 cm 01 was given by Ervin et al (10). spectroscopy (4,5,6), matrix isolation spectroscopy (7,8),…”

Section: Introductionmentioning

confidence: 99%