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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Photoelectron Spectroscopy of Yttrium Oxide Cluster Anions: Effects of Oxygen and Metal
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Photoelectron Spectroscopy of Yttrium Oxide Cluster Anions: Effects of Oxygen and Metal

机译：氧化钇团簇阴离子的光电子能谱：氧和金属的影响

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摘要

The photoelectron spectra of small gas-phase Y_NO_M~- CLUSTERS (N = 2-10, M = 1-3) ARE MEASURED AT PHOTON ENERGIES OF 3.49 AND 4.66 Ev. Cluster generation is performed with the aid of laser vaporization, Whereas the kinetic energy of electrons is measured using a magnetic bottle photoelectrron spectrometer. The evolution of the elecronic structure of neutral yttrium oxide clusters in discussed in terms of both sequential oxygen addition to the metal cluster core and sequential metal atom increase. Electron affinities and vertical detachment energies are measured and compared to ionizaton potentials of the monoxide cluster series [Knickelbein, M. J. Chem. Phys. 1995, 102, 1]. A general trend in the observed photoelecrtron spectra is a shifting of threshold energies to higher binding energies with increasing cluster size n. At low elecrteon binding energies, main spectral features are contributed from metal d-band orbitals whereas the O 2p contribution becomes apparent with increasing oxygen content due to a higher degree of hybridization of yttrium s, d, and oxygen 2p orbitals. The differences of yttrium-oxygen dissociation energies are determined and compared.
机译：在3.49和4.66 Ev的光子能量下测量了小的气相Y_NO_M〜-团簇（N = 2-10，M = 1-3）的光电子能谱。团簇的产生是借助激光汽化进行的，而电子的动能是使用磁瓶光电子谱仪测量的。讨论了中性氧化钇簇的电子结构的演变，包括向金属簇核中依次添加氧和增加金属原子。测量电子亲和力和垂直脱离能，并将其与一氧化碳簇系列的电离势进行比较[Knickelbein，M. J. Chem。物理1995，102，1]。观察到的电子光谱的总体趋势是随着簇尺寸n的增加，阈值能量向更高的结合能转移。在低电子结合能下，主要的光谱特征是由金属d波段轨道贡献的，而O 2p的贡献随着氧含量的增加而变得明显，这是由于钇s，d和氧2p轨道的杂化程度更高。确定并比较钇-氧离解能的差异。

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