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Formation and Photodissociation of Mn/P Ti/P Binary Clusters
Han Chunying,Zhang Xia,Zhao Xiang,Gao Zhen,Zhu Qihe
Author NameAffiliation
Han Chunying State Key Laboratory of Molecular Reaction Dynamics, Center of Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080 
Zhang Xia State Key Laboratory of Molecular Reaction Dynamics, Center of Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080 
Zhao Xiang State Key Laboratory of Molecular Reaction Dynamics, Center of Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080 
Gao Zhen State Key Laboratory of Molecular Reaction Dynamics, Center of Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080 
Zhu Qihe State Key Laboratory of Molecular Reaction Dynamics, Center of Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080 
Abstract:
Mn/P、Ti/P binary cluster ions, produced by laser ablation, were studied with a Tan-dem TOF mass spectrometer. The experiments show that the clustering ability of Ti/P is stronger than that of Mn/P. And there is an odd-even oscillation in the peak strength of MPy+(M=Mn, Ti) series, the mass peaks of evenmare higher than those of oddm. This relates to the specific stability of P4structure. Through laser photodissociation, P4or P2is easy to be stripped, it can be inferred that some phosphorus atoms combine into P4or P2and the interaction between it and the other part of the cluster is weaker. In the growth of the clusters, MnxPy+cluster cations rich in P transferred to those rich in Mn, while in cluster anions MnxPy-, it tends tox≈y. For Ti/P cluster cations and anions, the number of atoms of Ti/P are all close tox≈y.
Key words:  Mn/P binary clusters, Ti/P binary clusters, Laser ablation, Laser photodissociation
FundProject:国家自然科学基金资助项目
锰/磷、钛/磷二元团簇的激光溅射产生与光解
韩春英,张霞,赵翔,高振,朱起鹤
摘要:
利用激光溅射法直接产生了锰/磷、钛/磷二元团簇正、负离子MxPy±(M=Mn、Ti),并用串级飞行时间质谱仪研究了团簇离子的组成与激光光解规律.实验表明钛与磷间成簇的能力强于锰与磷间成簇的能力,且MPy+(M=Ti、Mn)团簇离子系列表现出峰强度随所含磷原子数目的奇偶性变化,这可能与P4结构的特殊稳定性有关.激光光解实验表明,失去中性P2、P4的通道为主要光解通道.随着团簇离子的生长,锰/磷团簇正离子逐渐由富磷簇向富金属簇过渡,钛/磷则趋向于形成钛原子数目与磷原子数目接近相等的团簇正离子,而二者与磷形成的团簇负离子MxPy-(M=Mn、Ti)逐渐趋向于x≈y,随样品中磷含量增加,锰/磷易形成富磷簇,钛/磷的组成趋向不改变.
关键词:  锰/磷团簇  钛/磷团簇  激光溅射  激光光解
DOI:10.1088/1674-0068/14/1/19-26
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