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Quenching of CH(A 2Δ and B 2Σ−) by NO, CHBr3 and amine molecules

✍ Scribed by Congxiang Chen; Qin Ran; Shuqin Yu; Xingxiao Ma

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
567 KB
Volume
203
Category
Article
ISSN
0009-2614

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✦ Synopsis

The rateconstants ofquenchingof CH(A*A) byCHBr3 and CH(A*A and B%) by NO, (CHS)INH, (($H5)2NHand (CH&N were measured by usmg a direct time-resolved technique at 290 K. CH (A 2A and B 'Z-) radicals were produced by laser photolysis of CHBr, at 266 nm. A mechanism for this photolysis process is proposed. The time-resolved emissions CH(A-rX) and CH(B+X) were monitored as a function of time using a fast digital storage oscilloscope coupled with a microcomputer. For quencher CHBrx, the preliminary result shows that the quenching rate constant decreases with increasing rotational quantum number ofCH(A ?A, v'=O). A comparison of the quenching rate constant of CH(A) with that of CH(B) is given.

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