高等学校化学学报

高等学校化学学报 ›› 1991, Vol. 12 ›› Issue (2): 231.

• 论文 • 上一篇    下一篇

酞菁镍与表面吸附氧和吡啶之间的电荷转移研究

梁月霞, 刘旺, 王德军, 肖良质, 汤国庆, 李铁津   

  1. 吉林大学化学系, 130023
  • 收稿日期:1989-06-07 出版日期:1991-02-24 发布日期:1991-02-24
  • 通讯作者: 刘旺
  • 基金资助:

    国家自然科学基金

A Study of Charge Transfer Between NiPc and Surface-Adsorbed Oxygen and Pyridine

Liang Yue-xia, Liu Wang, Wang De-jun, Xiao Liang-zhi, Tang Guo-qing, Li Tie-jin   

  1. Department of Chemistry, Jilin University, Changchun, 130023
  • Received:1989-06-07 Online:1991-02-24 Published:1991-02-24

PDF (PC)

被引次数

6

摘要： 利用表面光电压谱研究了酞菁镍的光伏性质及其受吸附O2和吡啶的影响.在真空条件下,除观察到酞菁镍在335、650和580nm附近有3个强光伏响应带外,还首次利用这一技术发现了450nm附近有一弱光伏响应带,并指认该带为由中心金属Ni2+的dπ轨道向酞菁环上的eg(πn)轨道的MLCT跃迁.在氧的存在下,450nm响应带会消失甚至发生反转,而吡啶的吸附则使酞菁镍的所有光伏响应带消失,但未观察到反转现象.

关键词: 酞菁镍, 表面吸附, 电荷转移, 表面光电压谱

Abstract: In this paper, the effects of adsorption of O2and pyridine on the photovoltaic properties of NiPc was studied by surface photovoltage spectroscopy. Avery weak photovoltaic response band near 450 nm was observed for the first time besides three strong bands near 335, 580 and 650 nm(Bb and and Qband), and was assigned to the charge transfer transition from the dπ orbital of central metal ion Ni2+to the eg(πn) orbital of PCring. In the presence of O2, the three strong bands slightly decreased in intensity, but the weak band disappeared and even reversed. Unlike O2, the adsorption of pyridine can make all photovoltaic response bands of NiPc disappear, but no reversed band was observed. The above results show the charge transfer interaction between NiPc and surface electron acceptors.

Key words: Nickel phthalocyanin, Surface adsorption, Charge transfer, Surface photovoltage spec-troscopy

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