Photolysis of isothiocyanic acid HNCS in low-temperature matrices. Infrared detection of HSCN and HSNC isomers

Wierzejewska, Maria; Mielke, Zofia

doi:10.1016/s0009-2614(01)01180-0

Cited by 60 publications

(57 citation statements)

References 32 publications

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“…Blank experiments conducted separately for SO 2 and HNCS in argon matrices agreed well with those previously reported [15,16,20,29,30]. Spectra obtained for the HNCS/SO 2 /Ar mixtures show several new absorptions as compared with the spectra of parent molecules in argon.…”

Section: Matrix Isolation Infrared Spectrasupporting

confidence: 87%

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Structural and spectroscopic properties of complexes formed between HNCS and SO 2 in low temperature matrices

Krupa

Wierzejewska

2017

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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Section: Matrix Isolation Infrared Spectrasupporting

confidence: 87%

“…Although the properties of the HNCS itself are now relatively well known [14][15][16][17][18][19] only few HNCS complexes have been studied so far. Among them are weak complexes formed between isothiocyanic acid and dinitrogen, xenon and carbon monoxide as well as HNCS dimer isolated in low temperature matrices [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Structural and spectroscopic properties of complexes formed between HNCS and SO 2 in low temperature matrices

Krupa

Wierzejewska

2017

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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“…11 The only process observed was isomerization of the HNCS monomer to HSCN and HSNC, both appearing simultaneously at the expense of the precursor molecules. No other photoproducts were identified in the studied spectra.…”

Section: Resultsmentioning

confidence: 99%

New data on photochemistry of the interstellar molecule: HNCS. Identification of the S⋯HCN complex

Krupa

Kosendiak

Wierzejewska

2015

Phys. Chem. Chem. Phys.

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Phototransformations of isothiocyanic acid (HNCS) induced by tunable UV laser were studied in low-temperature matrices. Two isomers of the precursor HNCS molecule are formed during UV irradiation of HNCS/Ar and HNCS/N2 samples: thiocyanic acid (HSCN) and isothiofulminic acid (HSNC). In addition, a complex between hydrogen cyanide and a ground state ((3)P) sulfur atom appears at irradiation with wavelength λ < 290 nm. The vibrational bands of the SHCN complex are observed at 3217.0 and 746.5 cm(-1) in Ar and 3223.5 and 764.5/752.0 cm(-1) in N2. At the beginning of irradiation SHCN is produced from the HNCS precursor. At longer times the main sources of the complex are HSCN and HSNC species. In solid nitrogen, HCN monomers are observed besides SHCN, indicating efficient escape of atomic sulfur out of the matrix cage occupied by the precursor. Differences in the extent of the observed processes are discussed in relation to the wavelength of the UV radiation applied and the type of matrices. Results of the computational studies on the SHCN geometry and infrared spectra are presented and compared with experimental data.

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“…Because HSCN is a low-lying, highly polar isomer, it was desirable to precisely measure its rotational spectrum so that a radioastronomical search could be undertaken. To date, HSCN had only been characterized experimentally at low spectral resolution by matrix-IR spectroscopy, where it was formed by UV-photolysis of HNCS in solid argon and nitrogen (Wierzejewska & Mielke 2001). In the original study of the rotational spectrum of HNCS, Beard & Dailey (1950) were unable to detect any evidence for HSCN, concluding that "thiocyanic acid" in its vapor state consists of at least 95% HNCS.…”

Section: Introductionmentioning

confidence: 99%

Laboratory Detection of Thiocyanic Acid HSCN

Brünken

Gottlieb

et al. 2009

ApJ

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The rotational spectrum of thiocyanic acid HSCN, a highly polar isomer of the well-known astronomical molecule isothiocyanic acid HNCS, has been measured in two radio bands: in the centimeter-wave band by Fourier transform microwave spectroscopy in a molecular beam, and in the millimeter-wave band by long-path absorption spectroscopy in a low-pressure glow discharge. Twelve spectroscopic constants were derived from more than 60 a-type rotational transitions between 11 and 346 GHz with J up to 30 and K a 6, including seven centimeter-wave transitions with resolved hyperfine structure. With these constants the rotational spectrum in the K a = 0 and K a = 1 ladders-those most likely to be observed in space-can now be calculated up to 400 GHz with formal uncertainties of less than 0.2 km s −1 in equivalent radial velocity. Thiocyanic acid was recently identified in Sgr B2 by Halfen et al. following the laboratory measurements, and there is possible evidence for it in cold dark clouds, with the implication that HSCN may be detectable in many galactic sources.

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Photolysis of isothiocyanic acid HNCS in low-temperature matrices. Infrared detection of HSCN and HSNC isomers

Cited by 60 publications

References 32 publications

Structural and spectroscopic properties of complexes formed between HNCS and SO 2 in low temperature matrices

Structural and spectroscopic properties of complexes formed between HNCS and SO 2 in low temperature matrices

New data on photochemistry of the interstellar molecule: HNCS. Identification of the S⋯HCN complex

Laboratory Detection of Thiocyanic Acid HSCN

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