Photodissociation of alkyl bromides at UV scope

CORC > 武汉物理与数学研究所 > 中国科学院武汉物理与数学研究所 > 2011年以前论文发表（包括2011年）

	Photodissociation of alkyl bromides at UV scope
	Tang, Y; Ji, L; Tang, BF; Zhu, RS; Zhang, S; Zhang, B
刊名	ACTA PHYSICO-CHIMICA SINICA
	2004-04-01
卷号	20 期号:4 页码:344-349
关键词	alkyl bromide REMPI (resonance-enhanced multiphoton ionization) TOF-MS (time-of-flight mass spectrometer) branching ratio
英文摘要	Some alkyl bromides (CHBr3, CH2Br2, C2H5Br, C2H4Br2) have been studied at 234 nm and 267 nm in the time-of-flight mass spectrometer by means of multiphoton dissociation and ionization. Under the radiation of UV laser, alkyl bromides are photolyzed after absorbing one photon, release Br atoms, absorbing photons continuously, and (2 + 1) resonance-enhanced multiphoton ionization of Br atoms takes place. The Br atoms from the dissociation of the bromides are probably at the ground state Br (P-2(3/2)0) or at the excitated state Br* (P-2(1/2)0), and the branching ratio of Br atom N(Br*) / N(Br) is obtained. We find that the branching ratio at 267 nm is obviously bigger than the result at 234 nm. After discussing the mechanics of the multiphoton process, we conclude that the change tendency of the branching ratio with the wavelength is due to the different dissociation channels.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Chemistry, Physical
研究领域[WOS]	Chemistry
关键词[WOS]	MULTIPHOTON IONIZATION ; 265 NM ; DYNAMICS
收录类别	SCI
语种	英语
WOS记录号	WOS:000220959000002
公开日期	2015-12-08
内容类型	期刊论文
源URL	[http://ir.wipm.ac.cn/handle/112942/9007]
专题	武汉物理与数学研究所_2011年以前论文发表（包括2011年）
作者单位	Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom Mol Phys, Wuhan 430071, Peoples R China
推荐引用方式 GB/T 7714	Tang, Y,Ji, L,Tang, BF,et al. Photodissociation of alkyl bromides at UV scope[J]. ACTA PHYSICO-CHIMICA SINICA,2004,20(4):344-349.
APA	Tang, Y,Ji, L,Tang, BF,Zhu, RS,Zhang, S,&Zhang, B.(2004).Photodissociation of alkyl bromides at UV scope.ACTA PHYSICO-CHIMICA SINICA,20(4),344-349.
MLA	Tang, Y,et al."Photodissociation of alkyl bromides at UV scope".ACTA PHYSICO-CHIMICA SINICA 20.4(2004):344-349.