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Formation and Photodissociation of Iron-Selenium Clusters
Chen Yunqing,Xing Xiaopeng,Liu Peng,Zeng Rong,Gao Zhen,Zhu Qihe
Author NameAffiliation
Chen Yunqing State Key Laboratory of Molecular Reaction Dynamics,Center for Molecular Science,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100080 
Xing Xiaopeng State Key Laboratory of Molecular Reaction Dynamics,Center for Molecular Science,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100080 
Liu Peng State Key Laboratory of Molecular Reaction Dynamics,Center for Molecular Science,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100080 
Zeng Rong State Key Laboratory of Molecular Reaction Dynamics,Center for Molecular Science,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100080 
Gao Zhen State Key Laboratory of Molecular Reaction Dynamics,Center for Molecular Science,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100080 
Zhu Qihe State Key Laboratory of Molecular Reaction Dynamics,Center for Molecular Science,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100080 
Abstract:
Fe-Se binary cluster ions produced by direct laser ablation,were studied with a tandem time-of-flight masss pectrometer.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 FenSen+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).
Key words:  Iron-selenium clusters,Laserablation,Ultraviolet photolysis
FundProject:国家自然科学基金资助项目
铁-硒二元团簇离子的产生和紫外光解
陈云清,邢小鹏,刘鹏,曾嵘,高振,朱起鹤
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Fe2Se2+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。
关键词:  铁-硒二元团簇  激光溅射  串级飞行时间质谱仪  紫外光解
DOI:10.1088/1674-0068/13/3/257-262
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