The emission of the CF2 radical in a microwave discharge
β Scribed by Quach-Tat-Trung; G. Durocher; P. Sauvageau; C. Sandorfy
- Publisher
- Elsevier Science
- Year
- 1977
- Tongue
- English
- Weight
- 316 KB
- Volume
- 47
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
The ultraviolet emission spectra of the fragments of CT2Cl2, CFzBr2, CF2C'IBr and CF2CI-CT2CI excited in a micro-Eve discharge have been mcasurcd. Between 240 and 340 nm the spectra were found to be practically idcnticd with those of the CF2 radiLx1 obtained by previous authors. Another band system between 340 and 450 nm is likely to belong also to the CT2 radical. It is suggested that it probably belongs to triplet-singlet c3B1 -'Al) emission_
π SIMILAR VOLUMES
The CF2 radical was gene&ted in an equilibrium effusion cell by tke react&m of gaseous SF6 with carbon at~l550 K. From electron impact threshold measuxm~nts, the vertiai i[P of CFZ was found to be 11.5'4 c 0.10 eV. This vaIue is
Rate constants have been measured over the temperature range 245-419 K for the gas-phase reactions of the hydmxyl radical with the hydrofluorocarbons CHF,CF,CF,CHF, and CF&HFCHFCF2CF,. The Arrhenius expressions k (CHF,CF,CFzCHF,) =(7.80i3.40)X10-'3exp[-(1.51~0.26)~103/T] and k(CF,CHFCHFCF~CF,)=(4.21
Chemiluminescence from electronitiy excited HS2 radi&s has be&n detected between 950 and 2100 nm in gas-pha;9 flow systems. The emission essentially consits of u:sequences of the I$ (Al 'A' -t x 'A") tra&iion wi& the 000 -000 lxmd origin at 1378 nm. DS2 was also studied For HSp the following spectro