kuze_2008

H. Kuze, T. Sato, T. Kambe, S. Hayashida and Y. Tatsumi, “Isotope-selective photodissociation of ozone molecules induced by infrared laser irradiation”, Chem. Phys. Lett. 455, 156 (2008)

Source record · Catalogue · Review register

DOI: 10.1016/j.cplett.2008.02.080

Source kind: measurement

Recorded technique: Narrow-band DFB diode laser (and a high-power external-cavity diode laser) tuned to single rotational lines of the Wulf band 3A2 <- 1A1 (v2 = 1-0) near 10 080 cm^-1 (about 992 nm), irradiating ozone (about 16 vol % in O2/N2, below 30 kPa total) of natural or 18O-enriched composition for 16-36 h in a 5.7 m single-pass cell (960 cm^3, -15 to 30 C); decomposition followed by second-derivative (2f) absorption of isotopologue lines (reproducibility +-0.002 cm^-1) and by the cell pressure (pp. 156-158).

Materials in structured entries: None recorded.

Dataset quantities: None recorded.

Contents: 0 datasets; 0 formulas.

Curation notes

Context only, no datasets. Identity checked on the first page: Kuze, Sato, Kambe, Hayashida and Tatsumi, Chem. Phys. Lett. 455, 156-158 (2008).

What it shows: single-photon, isotope-selective predissociation of O3 in the Wulf band near 1 um. The decomposition of the irradiated isotopologue is ‘nearly proportional to the laser power’ with ‘no apparent threshold’ (Fig. 4b), so a one-photon process through rotationally resolved lines of 3A2 <- 1A1 (v2 = 1-0), not multiphoton absorption (abstract, p. 158). Irradiating the 666 line at 10081.30 cm^-1 (AL3) decomposed about 15 % of 666 ozone in 36 h; the 668 isotopologue’s own decomposition follows mostly from line overlap (p. 157).

Why nothing is taken: the paper gives decomposition volumes and peak-height decays in figures only, under cell-specific conditions (wall decomposition, irradiation times), with no cross section or quantum yield. Line positions (AL1 10074.61, AL2 10080.68, AL3 10081.30, AL4 10074.42 cm^-1; the 666 band origin 10082.0 cm^-1 from Bouvier et al. 2001) and the isotopologue fractions are not curated quantities. The ‘absorption cross-section ... on the order of 10^-23 cm^2’ (p. 156) is an order of magnitude only (el_helou_2005 measures the (1,0) band maximum, 3.80 x 10^-23 cm^2 at 294 K). The statement that 3A2 lies 0.13 eV above the dissociation limit is quoted from ab initio work (refs. 4, 5: Xie et al. 2001; grebenshchikov_2007).

Register: TC-980.

Recorded bibliographic identity status: VALIDATED. This concerns identification of the source; it does not establish the scientific correctness of its contents.

Datasets

No datasets are recorded.

Formulas

No formulas are recorded.

Corrections

No dataset errata are recorded in this source record.

Formula corrections, where recorded, appear with their formulas above. Curation notes may also discuss corrections or unresolved interpretation. Consult the review register for the checks and decisions.