铁-硒二元团簇离子的产生和紫外光解  

Formation and Photodissociation of Iron-Selenium Clusters

作　　者：陈云清[1] 邢小鹏[1] 刘鹏[1] 曾嵘 高振[1] 朱起鹤[1] 

机构地区：[1]中国科学院化学研究所分子科学中心,北京100080

出　　处：《Chinese Journal of Chemical Physics》2000年第3期257-262,共6页化学物理学报（英文）

基　　金：国家自然科学基金

摘　　要：用激光直接溅射的方法产生了铁－硒二元团簇，并用串级飞行时间质谱仪研究了二元团簇的组份和光解规律，一级谱中组成FenSen+、FenSen-1+和FenSen-、FenSen+1是二元团簇的结构骨架和稳定组份，团簇正离子FenSen+的紫外光解结果表明，光解产物主要为一级谱中丰度较大的离子，用密度泛函方法（DFT）优化了FenSe2+的几何结构，并计算了其光解通道，能较好地解释光解的实验结果。Fe-Se binary cluster ions produced by direct laser ablation, were studied with a tandem time-of-flight mass spectrometer. It Was found that FenSen+, FenSen-1+ in cluster cations,FenSen-, FenSen+1- in cluster anions were main compositions of binary cluster ions. The photodissociation of cations FenSem+ showed that FenSen+, FenSen-1+ were main photofragments, confirming their special stablity. The possible structures of Fe2Se2+ were calculated by Density Function Theory (B3LYP/LANL2DZ).

关 键 词：铁-硒二元团簇 激光溅射 紫外光解 结构 

分 类 号：O614[理学—无机化学]