物理化学学报 >> 2000, Vol. 16 >> Issue (05): 437-440.doi: 10.3866/PKU.WHXB20000512

研究论文 上一篇    下一篇

K/Ru(10ī0)表面上的CO-4a1轨道对称性确定

李海洋, 鲍世宁, 杨东, 何丕模, 徐亚伯, 刘凤琴, 易布拉欣. 奎热西, 钱海杰   

  1. 浙江大学物理系,杭州 310027|中国科学院高能物理研究所同步辐射实验室,北京 100039
  • 收稿日期:1999-08-12 修回日期:1999-11-25 发布日期:2000-05-15
  • 通讯作者: 李海洋

Investigation of CO-4a1 Orbital Symmetry on K/Ru(10ī0) by Synchrotron Rdiation Photoemission

Li Hai-Yang, Bao Shi-Ning, Yang Dong, He Pi-Mo, Xu Ya-Bo, Liu Feng-Qin, K.Yibulaxin, Qian Hai-Jie   

  1. Physics Department,Zhejiang University,Hangzhou 310027|Laboratory for Synchrotron Radiation,Institute of High Energy Physics,Academia Sinica,Beijing 100039
  • Received:1999-08-12 Revised:1999-11-25 Published:2000-05-15
  • Contact: Li Hai-Yang

摘要:

用同步辐射角分辨偏振紫外光电子谱对K/Ru( 10 10 )面上吸附的CO分子轨道的对称性测量发现 :结合能在 11.2eV的CO - 4a1( 4σ)分子轨道对s偏振光 (在沿<1210>的入射面 )是禁戒的 .结果表明由于K的强烈影响 ,CO的分子轨道重新排列 (sp2 杂化 ) .依据选择定则和分子轨道的对称性说明 ,sp2 再杂化的CO分子吸附的桥位取向是 <1210 >晶向.

关键词: CO分子轨道, 偏振光电子谱, 再杂化模型

Abstract:

In the ARUP spectra for CO adsorbed on the K/Ru(1010) surface two peaks are observed respectively at 7.8 eV and 11.2eV binding energies. The peak 11.2 eV BE represents the CO-4a1 (5σ), which is forbidden under s-polarized light. According to the selection rule, the result supports the sp2-rehybridized model under the strong influence of coadsorbed K atoms on Ru(1010) surface and shows the CO bridge adsorption at 〈1210〉 azimuth.

Key words: CO orbital, Polarized light UPS, sp2-rehybridized model