己烯在Ru(1010)表面价带电子特性研究

The Electronic Structure of Hexene on Ru(100) Surface

在200K以下己烯(C6H12)可以在Ru(101珔0)表面上以分子状态稳定吸附.偏振角分辨紫外光电子谱(ARUPS)结果表明,己烯分子在垂直于衬底表面并沿衬底表面<12珔10>晶向的平面内,己烯分子的轴向沿<12珔10>晶向倾斜.随着衬底温度的提高,到200K以上,己烯分解生成新的碳氢化合物.己烯分解后,πCH分子轨道能级向高结合能方向移动了0.2eV,同时己烯中C的1s能级向低结合能方向移动了0.3eV.

The adsorption of hexene(C6H12)on Ru() surface has been studied by the polarized angle resolved ultra violet photoemission spectroscope (ARUPS) and X ray photoemission spectroscope (XPS).The results show that the hexene absorbs in a molecular state on the Ru() surface below 200 K,the molecular orbits of πCC,σCC and πCH were found at 7.5,9.4 and 11.1 eV respectively.The results of the polarized ARUPS show that the σCC orbit is symmetry about a mirror plane along <> azimuth but the πCC orbit is anti symmetry about a mirror plane.The results suggest that the hexene molecule lies in a plane along <> azimuth.With warming the substrate to 200 K the πCH molecular orbit increases 0.2 eV in binding energy,and the C 1s core level decreases 0.3 eV in binding energy,the results suggest that dehydrogenated of hexene occurs at 200 K.