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

Abstract

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 e_g(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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Liang Yue-xia, Liu Wang, Wang De-jun, Xiao Liang-zhi, Tang Guo-qing, Li Tie-jin . A Study of Charge Transfer Between NiPc and Surface-Adsorbed Oxygen and Pyridine[J]. Chem. J. Chinese Universities, 1991, 12(2): 231.

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

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