物理化学学报 >> 1991, Vol. 7 >> Issue (03): 349-353.doi: 10.3866/PKU.WHXB19910318

研究简报 上一篇    下一篇

酞菁锰与表面吸附的NO2之间的电荷转移相互作用研究

韩明勇; 刘旺; 王德军; 肖良质; 李铁津   

  1. 吉林大学化学系,长春 130023
  • 收稿日期:1989-12-29 修回日期:1990-06-25 发布日期:1991-06-15
  • 通讯作者: 刘旺

A Sutdy of Charge Transfer Interaction Between MnPc and Surface-Adsorbed NO2

Han Ming-Yong; Liu Wang; Wang De-Jun; Xiao Liang-Zhi; Li Tie-Jin   

  1. Department of Chemistry, Jilin University, Changchun 130023
  • Received:1989-12-29 Revised:1990-06-25 Published:1991-06-15
  • Contact: Liu Wang;

关键词: 酞菁锰, 表面吸附的NO2, 表面光电性质

Abstract: The influence of surface-adsorbed NO_2 on the surface photovoltaic properties of MnPc and the related charge transfer interaction were studied by surface photovoltage spectroscopy. In comparison with other metal-phthalocyanines, the photovoltaic response of MnPc is very particular. A strong photovoltaic response band near 510 nm was observed besides B band (365 nm) and Q bands (640, 725 nm), which was assigned as the MLCT transition from the e_g(d_(xz), d_(yz)) orbital of central manganese ion to the b_(lu)(π~*) orbital of Pc ring. Under given conditions, the MnPc exhibited reverse photovoltaic response after adsorbing NO_2 and, consequently, the spectral distribution changed remarkably, which suggests that there is a strong charge transfer interaction between them. The photodesorption experiments indicated that NO_2 was adsorbed by the atomic oxygen bridged dimer of MnPc prior to the MnPc monomer and made the dimer partly decomposed. Besides, there is a selective interaction between NO_2 and MnPc with respect to the various electron transitions of MnPc.

Key words: MnPc, Surface-adsorbed NO2, Surface photovoltaic properties