摘要
<正> 实验光谱学和理论计算都发现,“重原子”能隔离分子中的某些振动能景,如SiH_4中Si—H振动泛频的“局域模”.Roger 等在研究F 原子与M(CH_2CH=CH_2)_4(M=Sn,Ge)的反应中,发现了Sn,Ge 对过剩能量转移到其它部分有强烈的阻碍作用(在中间态的寿命时间内).最近,在研究O(~1D)+M(CH_3)_4生成OH(v)反应中,观测到类似的现象.M=C 时,Lutz 用激光诱导荧光方法检测OH 的振动分布,振动是冷的,v=1与v=0的布居比为0.05,
The vibrationally excited OH(v)from the reaction of O(~1D)+Si(CH_3)_3Cl wasobserved by UV laser photolysis/FTIR emission spectroscopy.The vibrational numberwas only up to 3 with a ratio of 1:0.8:0.1 for v=1:2:3.Comparing this result withthe similar reaction of O(~1D)+Si(CH_3)_4 which OH(v)vibrational number was highup to 4 with a ratio of 1:1:1:0.3 for v=1:2:3:4 under the same experimental con-ditions,it was found that the substitution of Cl for CH_3 affected the extent of heavySi atom blocking the energy migration in a molecule.This results identifies the predic-tion that the characteristic of electrons in central atom plays an important role inintramolecular energy transfer.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
1993年第4期447-449,共3页
Acta Physico-Chimica Sinica
基金
国家自然科学基金
关键词
重原子
红外发射谱
三甲基氯硅烷
Intramolecular energy transfer
IR emission spectroscopy
Heavy atom effect
Chlorotrimethylsilane
