Raman Spectra of Formamide-N-d<sub>2</sub> and of Formamide in Concentrated Hydrochloric Acid

Smith, Charles H.; Robinson, J. Donald

doi:10.1021/ja01563a025

Cited by 13 publications

(6 citation statements)

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“…The band positions of mellitic (benzenehexacarboxylic, C 6 (COOH) 6 ) acid (figure 3c) correspond very well to the Raman spectra observed by Jehlicka et al (2006a) using a bench spectrometer, namely the Renishaw inVia micro-Raman The NCO stretching vibration band is observed at 1677 cm −1 and the NH 2 deformation vibration band is located at 1393 cm −1 ; both bands are in good agreement with previous Raman observations (Smith & Robinson 1957). The NH 2 symmetric rocking vibration band can be seen at 1140 cm −1 and the CH out-of-plane bending vibration band lies at 1050 cm −1 (figure 4a).…”

Section: (Vi) Mellitic Acidsupporting

confidence: 88%

Using portable Raman spectrometers for the identification of organic compounds at low temperatures and high altitudes: exobiological applications

Jehlička

Edwards

Culka

2010

Phil. Trans. R. Soc. A.

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Organic minerals, organic acids and NH-containing organic molecules represent important target molecules for astrobiology. Here, we present the results of the evaluation of a portable hand-held Raman spectrometer to detect these organic compounds outdoors under field conditions. These measurements were carried out during the February-March 2009 winter period in Austrian Alpine sites at temperatures ranging between −5 and −25• C. The compounds investigated were detected under field conditions and their main Raman spectral features were observed unambiguously at their correct reference wavenumber positions. The results obtained demonstrate that a miniaturized Raman spectrometer equipped with 785 nm excitation could be applied with advantage as a key instrument for investigating the presence of organic minerals, organic acids and nitrogencontaining organic compounds outdoors under terrestrial low-temperature conditions. Within the payload designed by ESA and NASA for several missions focusing on Mars, Titan, Europa and other extraterrestrial bodies, Raman spectroscopy can be proposed as an important non-destructive analytical tool for the in situ identification of organic compounds relevant to life detection on planetary and moon surfaces or near subsurfaces.

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Section: (Vi) Mellitic Acidsupporting

confidence: 88%

Using portable Raman spectrometers for the identification of organic compounds at low temperatures and high altitudes: exobiological applications

Jehlička

Edwards

Culka

2010

Phil. Trans. R. Soc. A.

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“…S6 †). 48 30,31,49,50 Borohydride signal is not observed when the reaction is carried at 60 °C, implying its fast reaction with CO 2 at this temperature (Fig. S9 †).…”

Section: Resultsmentioning

confidence: 99%

Solvent- and catalyst-free reduction of CO₂ with ammonia borane

Lombardo,

Nishiguchi,

et al. 2024

Green Chem.

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“…[14] The NH 2 symmetric rocking vibration band can be seen at 1140 cm −1 and the CH out-of-plane bending vibration band lies at 1050 cm −1 . These bands correspond probably to the bands at 1133 and 1041 cm −1 as observed in Ref.…”

Section: Formamidementioning

confidence: 95%

Raman spectra of nitrogen‐containing organic compounds obtained using a portable instrument at −15 °C at 2860 m above sea level

Jehlička

Culka

2009

J Raman Spectroscopy

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Well-resolved Raman spectra of samples of nitrogen-containing compounds were detected using a portable Raman instrument (Ahura First Defender XL) outdoors at a low ambient temperature of −15 • C and at an altitude of 2860 m (Pitztall, Austria). The portable Raman spectrometer tested here is equipped with a 785-nm diode laser and a fixed frontal probe. Solid form of formamide, urea, 3-methylpyridine, aniline, indene, 1-(2-aminoethyl)piperazine, indoline and benzofuran were detected unambiguously under high-mountain field conditions. The main Raman features (strong, medium and partially weak bands) were observed at the correct wavenumber positions (with a spectral resolution 7-10 cm −1 ) in the wavenumber range 200-1600 cm −1 . The results obtained demonstrate the possibility of employing a miniaturised Raman spectrometer as a key instrument for investigating the presence of nitrogen-containing organic compounds and biomolecules outdoors under low temperature conditions. Within the payload designed by European Space Agency (ESA) and National Aeronautics and Space Administration (NASA) for future missions, focussing not only on Mars, Raman spectroscopy represents an important instrumentation for the detection of organic nitrogen-containing compounds relevant to life detection on planetary surfaces or near sub-surfaces.

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Raman Spectra of Formamide-N-d₂ and of Formamide in Concentrated Hydrochloric Acid

Cited by 13 publications

References 1 publication

Using portable Raman spectrometers for the identification of organic compounds at low temperatures and high altitudes: exobiological applications

Using portable Raman spectrometers for the identification of organic compounds at low temperatures and high altitudes: exobiological applications

Solvent- and catalyst-free reduction of CO₂ with ammonia borane

Raman spectra of nitrogen‐containing organic compounds obtained using a portable instrument at −15 °C at 2860 m above sea level

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Raman Spectra of Formamide-N-d2 and of Formamide in Concentrated Hydrochloric Acid

Cited by 13 publications

References 1 publication

Using portable Raman spectrometers for the identification of organic compounds at low temperatures and high altitudes: exobiological applications

Using portable Raman spectrometers for the identification of organic compounds at low temperatures and high altitudes: exobiological applications

Solvent- and catalyst-free reduction of CO2 with ammonia borane

Raman spectra of nitrogen‐containing organic compounds obtained using a portable instrument at −15 °C at 2860 m above sea level

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Product

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Raman Spectra of Formamide-N-d₂ and of Formamide in Concentrated Hydrochloric Acid

Solvent- and catalyst-free reduction of CO₂ with ammonia borane