摘要
利用可调谐染料激光，对ＰＣｌ３在２６５—２８５ｎｍ范围内的光解机理进行了研究．发现在２６５—２８５ｎｍ范围内光解ＰＣｌ３所获得的荧光发射谱基本相同，但在强度上有较大差别．在３８９，４３１和４８８ｎｍ处观察到明显的荧光发射，这些荧光来自ＰＣｌ３双光子解离产生的碎片ＰＣｌ激发态的发射．其中４８８ｎｍ处的荧光来自ＰＣｌ（Ａ→Ｘ）的跃迁，而３８９和４３１ｎｍ处的荧光可能来自ＰＣｌ的尚未报道过的一新的单重态ＰＣｌ（ｃ？→ａ，ｂ）的跃迁．
Abstract The dynamics of photon dissociation of PCl 3 in the range of 265—285nm was studied by using tunable dye laser. The measured emission spectra are similar in this excitation range, but their intensities are different. Three main peaks are observed in the range of 380—520nm in the emission spectrum. The strongest peak is at 43lnm, the other two weaker peaks are at 389 and 488nm, respectively. It is suggested that the peak at 488nm is from the transition of PCl( A ) to PCl( X ), and the peaks at 431 and 389nm are from the transitions of a new singlet state PCl( c? ) to PCl( b ) and PCl( a ), respectively.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
1999年第1期44-48,共5页
Acta Physica Sinica
基金
国家自然科学基金
国家攀登计划
