High-resolution FTIR spectra of NO2 and N2O4 in supersonic jet expansions and their rovibrational analysis

Luckhaus, David; Qüack, Martin

doi:10.1016/0009-2614(92)80121-q

Cited by 34 publications

(4 citation statements)

References 26 publications

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“…These gas phase products depend on the decomposition temperatures. The main gas phase products observed in all samples were H 2 O (3280 cm -1 ) [28,29] and NO 2 (1630 cm -1 ) [21,[30][31][32][33]. A strong feature assigned to HNO 3 (875, 1325, and 1720 cm -1 ) [33,34] emission can be observed for Fe(III) and Cu(II) doped samples and a small N 2 O 5 (1055 cm -1 ) [33,34] emission in the Ni(II) and Cr(III) samples.…”

Section: F(β) =mentioning

confidence: 99%

Catalysis of the Thermal Decomposition of Transition Metal Nitrate Hydrates by Poly(vinylidene difluoride)

Sumathirathne

Euler

2021

Polymers

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Poly(vinylidene difluoride) (PVDF) doped with transition metal nitrate hydrates are cast into thin films giving a high β-phase content. Analysis of the thermal behavior of the doped PVDF shows that the decomposition of the metal (II) nitrate hydrates to metal (II) oxides is catalyzed by the PVDF, as evidenced by reduction in the decomposition temperature by as much as 170 °C compared to the pure metal salts. In contrast, there is little to no apparent catalysis for the decomposition of the metal (III) nitrate hydrates. The FTIR spectra of the gas phase decomposition products show H2O and NO2 are the major components for both PVDF-doped material and the pure metal nitrate hydrates. A mechanism for the role of PVDF is proposed that uses the internal electric field of the ferroelectric phase to orient the nitrate ions and polarize the N-O bonds.

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Section: F(β) =mentioning

confidence: 99%

Catalysis of the Thermal Decomposition of Transition Metal Nitrate Hydrates by Poly(vinylidene difluoride)

Sumathirathne

Euler

2021

Polymers

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“…49,50 Of course, the transition between molecules and molecular clusters is a continuous one, with some of the latter being rather strongly bound. 51,52 A better distinction may refer to the vibrational partition function at room temperature. If it exceeds 10 2 -10 3 , it becomes progressively more difficult to achieve sufficient vibrational cooling in the jet for rotationally resolved spectra, which would justify a large optical path difference in the interferometer.…”

Section: A Menu Of Nozzlesmentioning

confidence: 99%

Femtisecond single-mole infrared spectroscopy of molecular clusters

Suhm

Kollipost

2013

Phys. Chem. Chem. Phys.

136

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The sensitivity limitations of Fourier transform infrared (FTIR) spectroscopy for the detection of molecular clusters formed in rarefied gas expansions can be overcome by synchronizing intense gas pulses at a low duty cycle with rapid interferometer scans. This turns the broadband FTIR approach into a universal cluster spectroscopy tool applicable from the far (200 cm(-1)) to the near (8000 cm(-1)) IR. It nicely complements more selective and more restricted laser-based techniques and it provides a gas-phase variant of the matrix-isolation method, the main drawback being substance consumption. A survey over the capabilities, limitations and perspectives of this high-throughput nozzle approach to cluster FTIR spectroscopy is given.

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“…Recently, narrow band, difference frequency sources have been developed in the 4-9 #m region that hold great promise for IVR studies (80). Efforts to achieve more complete frequency coverage have focused on using FTIR instruments to detect absorption in a jet expansion (81)(82)(83)(84)(85). At present the sensitivity of these spectrometers has not allowed the measurement of highly perturbed spectra.…”

Section: Single-photon Techniquesmentioning

confidence: 99%