Chemical ionization discharge of N2O for matrix infrared spectroscopic study of isolated anions

Hacaloğlu, Jale
Andrews, Lester
A Townsend discharge chemical ionization source has been used for matrix infrared studies of anions in the argon-N20 system. In addition to neutral products, the NO", N02", (NO)f, NN02", and 03" anions have also been isolated. Filtered visible photolysis shows different behaviors for these anions. The two isomers NN02" and (NO)2" have been identified by isotopic substitution and characterized by different 15N and 180 isotopic shifts and different structures. These matrix isolation experiments provide structural information on two different N202" stoichiometry anions observed in mass spectroscopy experiments.
Journal of Physical Chemistry


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Hacaloğlu, Jale (1989-01-01)
A chemical ionization source from mass spectrometry has been used with CCl4, CHCl3 and CH2Cl2/argon mixtures for matrix isolation spectroscopy in the IR and visible-near UV regions. The major product absorptions in both regions have been observed and assigned previously. The comparison of positive and negative ion operation is striking for CCl4; the yields of CCl+3, CCl+4 and Cl+3 are increased and HCl−2 is not produced in positive ion operation.
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In this work, the thermal degradation characteristics of poly(isobornyl acrylate) (PIBA), and its copolymer with PMMA, P(MMA-co-IBA) were investigated via direct pyrolysis mass spectrometry. Thermal degradation behavior of poly(isobornyl methacrylate) (PIBMA) was also studied for a better understanding of thermal degradation mechanism of PIBA. For both PIBA and PIBMA, gamma-H transfer from the isobornyl ring to the carbonyl group was predominantly effective in thermal degradation. As a consequence of evolut...
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One of the most commonly used nonsteroidal anti-inflammatory active pharmaceutical ingredient called Meloxicam has been characterized spectroscopically both by Terahertz (THz) time domain spectroscopy (THz-TDS) and by Fourier Transform Infrared (FTIR) spectroscopy in far-IR regions of electromagnetic spectrum; 0.2 THz-20 THz. While many relatively sharp features are observed in the far-IR range between 2 THz-20 THz as expected for being an organic substance, very distinct and relatively strong absorption ba...
Thermal characterization of composites of polyamide-6 and polypropylene involving boron compounds via direct pyrolysis mass spectrometry
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In this work, the effects of addition of boron compounds, boron phosphate (BPO4), zinc borate (ZnB), borosilicate (BSi) and lanthanum borate (LaB), on thermal degradation characteristics of composites of polyamide 6 (PA6) and polypropylene (PP) are analyzed via Direct Pyrolysis Mass Spectrometry (DP-MS) technique. The composites of PA6 involve nitrogen containing flame retardants, melamine (Me) or melamine cyanurate (MC); or phosphorus containing flame retardant, aluminum diethylphosphinate (AlPi), with or ...
Citation Formats
J. Hacaloğlu and L. Andrews, “Chemical ionization discharge of N2O for matrix infrared spectroscopic study of isolated anions,” Journal of Physical Chemistry, pp. 1759–1764, 1990, Accessed: 00, 2020. [Online]. Available: