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Citation: Liu Kai, Shen Shu-Yin, Xu Hui-Jun. Interaction between Tetrasulfophthalocyanines and Collidal TiO₂ andInterfacial Electron Transfer[J]. Acta Physico-Chimica Sinica, ;2000, 16(12): 1103-1109. doi: 10.3866/PKU.WHXB20001208 shu

Interaction between Tetrasulfophthalocyanines and Collidal TiO₂ andInterfacial Electron Transfer

1.
Institute of Photofraphic Chemistry,The Chinese Academy of Science,Beijing 100101

Received Date: 6 July 2000
Available Online: 15 December 2000

Negatively charged tetrasulfophthaloeyanines adsorb strongly on the surface of colloidal TiO2 through electrostatic interaction.In comparison with tetraalkoxy phthalocyanines,the interaction between tetrasulfophthaloeyanine and colloid TiO2 was probed by absorption and fluorometric spectroscopy and the apparent association constants K were calculated.Quenching of tetrasulfophthaloeyanine fluorescence by colloidal TiO2 is attributed to the charge injection from the excited singlet stste of tetrasulfophthaloeyanine to the conduction band of TiO2.The photoinduced electron transfer process was further elucidated by fluorescence lifetime measurements using single-photon counting technique.Tetrasulfopthalocyanines were adsorbed on the surface of nanocrystalline TiO2 electrode and their photoelectric properties were measured.It is indicated that the photoelectric response is closely related to the extent of association of tetrasulfophthalocyanines on the TiO2 electrode surface.
- Tetrasulfophthalocyanine,
- Colloidal TiO₂,
- Electron transfer reaction
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沈阳化工大学材料科学与工程学院沈阳 110142

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Interaction between Tetrasulfophthalocyanines and Collidal TiO2 andInterfacial Electron Transfer

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Interaction between Tetrasulfophthalocyanines and Collidal TiO₂ andInterfacial Electron Transfer