Observation of the A-X electronic transition of the 1-C3H7O2 and 2-C3H7O2 radicals using cavity ringdown spectroscopy.
نویسندگان
چکیده
Cavity ringdown spectra of the A-X electronic transition of the 1-propyl and 2-propyl peroxy radicals are reported. Spectroscopic assignments are facilitated by implementing several production mechanisms, either isomer-specific or not. Assignments of specific spectral lines to particular conformers of a given isomer are suggested. Observations on the temporal decay of the various species are reported.
منابع مشابه
Observation of the à − X̃ Electronic Transition of the CF 3 O 2 Radical
The first observation of a sharp, structured electronic spectrum for a fluorinated alkyl peroxy radical is reported using the technique of cavity ringdown spectroscopy (CRDS). The T00 value for the Ã2A′ − X̃2A′′ transition of CF3O2 has been determined to be 6656(3) cm−1; values for à state vibrational frequencies have also been determined. Initial kinetic observations on CF3O2 have been carried ...
متن کاملNear-IR cavity ringdown spectroscopy and kinetics of the isomers and conformers of the butyl peroxy radical.
Cavity ringdown spectra of butyl peroxy radicals have been obtained for their A-X electronic transition in the near-IR. The radicals were produced by two independent chemical methods, allowing unambiguous assignment of the spectra of the four butyl peroxy isomers with probable conformer assignments also possible for a number of cases. Using the analyzed spectra semiquantatively, isomer specific...
متن کاملObservation of the A-x electronic transition of the isomers and conformers of pentyl peroxy radical using cavity ringdown spectroscopy.
Cavity ringdown spectra of the A-X electronic transition of all eight isomers of the pentyl peroxy radical are reported. Using the corresponding assignments from previously studied smaller alkyl peroxy radicals, assignments of origin bands are made for the pentyl peroxy isomers including some conformer-specific assignments for bands of a given isomer. Ab initio calculations also were performed ...
متن کاملDetection and Characterization of Alkyl Peroxy Radicals Using Cavity Ringdown Spec- Troscopy
Peroxy radicals form a class of important intermediates in oxidation chemistry. In recent years much effort has been put into the study of the kinetics of peroxy radicals largely via monitoring their broad and structureless A A UV absorption transition. The A A electronic transition of the peroxies, residing in the near-IR region, has also been observed, but due to the relative inaccessibility ...
متن کاملCavity Ringdown Spectroscopy of the Ã− X̃ Electronic Transition of the Phenyl Peroxy Radical
Cavity ringdown spectra (CRDS) of the near IR Ã2A′ X̃2A′′ electronic transition of phenyl peroxy radical are reported. The electronic origin is observed at 7497 cm−1. Ab initio calculations have been carried out to aid the assignement of the electronic origin and other bands involving vibrational excitation.
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ورودعنوان ژورنال:
- The journal of physical chemistry. A
دوره 109 7 شماره
صفحات -
تاریخ انتشار 2005