12164-97-5Relevant articles and documents
A study of the products of the reaction of phosphorus and dioxygen
Bauschlicher Jr., Charles W.,Zhou, Mingfei,Andrews, Lester
, p. 3566 - 3571 (2007/10/03)
The products of the reaction of laser-ablated red phosphorus and dioxygen have been studied using experiment and theory. The bands at 480.3 and 1273.3 cm-1, previously attributed to PO3 in the matrix isolation IR experiments, are reassigned to PO3- Also observed in experiment are PO2, PO2-, P2O, OPOPO, P4, and higher oxides.
Matrix Reactions of Oxygen Atoms with P4. Infrared Spectra of P4O, P2O, PO and PO2
Andrews, Lester,Withnall, Robert
, p. 5605 - 5610 (2007/10/02)
Oxygen atoms (16O and 18O) from ozone photolysis and discharge of oxygen molecules were reacted with P4 molecules and the products were trapped in solid argon at 12 K.The major product P4O exhibited a strong terminal P=O stretching mode at 1241 cm-1, a P-P=O deformation mode at 243 cm-1, and four P-P stretching modes near P4 values, all of which characterize a C3v species.Two new molecular species probably arise from energized P4O before relaxation by the matrix: The first absorbed at 1197 cm-1, photolyzed with red light, and is probably P2O.The second absorbed at 856 and 553 cm-1, increased with short-wavelength radiation, and is most likely due to the C2v bridge-bonded P4O structural isomer.Higher discharge power gave O atoms and vacuum ultraviolet radiation; these conditions favored the bridge-bonded P4O species and the simple PO and PO2, which were observed at 1218 and 1319 cm-1, respectively.The matrix efficiently quenched the large exothermicity (130 +/- 10 kcal/mol) for the P4 + O reaction and allowed the lowest oxide of phosphorous, P4O, to be trapped for the first time as a molecular species.
The laser induced fluorescence spectrum and radiative lifetime of PO2
Hamilton, Peter A.
, p. 33 - 41 (2007/10/02)
The ultraviolet spectrum of PO2 first observed in absorption by Verma and McCarthy has been studied by laser induced fluorescence for the first time.The spectra are similar in many respects to those observed in the visible system of NO2 and no predissociation is observed.The loss of rotational structure is attributed instead to mixing with one or more near continuous background states, with the amount of mixing apparently related to excitation of the bending vibration.The radiative decays are observed to be nonexponential but are accurately described by a double exponential form.This gives collision free radiative lifetimes of about 0.5 and 4.5 μs for the structured and continuous states, respectively, with the effective lifetime of the structured state varying strongly with the amount of mixing.Collisional quenching rate constants are roughly constant at (6 +/- 1) * 10-10 and (4 +/- 1) * 10-11 cm3 molecule-1 s-1 for the two states, with the very rapid quenching rate of the structured state probably being for nonradiative transfer to the background continuum.From observations of the wavelength dependence of the fluorescence the ground state ν2 and ν1 frequencies are found to be about 387 and 1117 cm-1, respectively.The emission is very extensive and strongly red shifted and lends further evidence that these states of PO2 are responsible for the chemiluminescence observed in phosphorus/oxygen reactions.
