Dispersion of Metal Phthalocyanines on Surface of TiO 2

• Published in: Chinese journal of chemistry 2005-05, Vol.23 (5), p.506-510
• Main Authors: Jian‐Feng, Zhu, Chun‐Ming, Wang, Yue‐Xiang, Zhu, Bi‐Ying, Zhao, You‐Chang, Xie
• Format: Article
• Language: English
• ISSN: 1001-604X; 1614-7065
• DOI: 10.1002/cjoc.200590506

Dispersion of copper(II) phthalocyanine (CuPc), copper(II) phthalocyaninesulfonate (CuPcS) and cobalt(II) phthalocyaninetetrasulfonate (CoPcTS) on the surface of titanium dioxide was investigated by XRD, XPS, FT‐IR and UV‐Vis techniques. Results show that interaction between CuPc and TiO 2 was very weak and CuPc was difficult to disperse on the surface of the support. While partly sulfurized CuPcS could be dispersed on the surface of support through sulfo‐groups and its dispersion capacity was determined to be 0.085 g CuPcS/g TiO 2 . Completely sulfurized CoPcTS could also be dispersed on the surface of TiO 2 as a monolayer and its dispersion capacity was 0.12 g CoPcTS/g TiO 2 . Interactions of the sulfo‐groups as well as the electrons of CoPcTS with the surface of TiO 2 could be evidenced by FT‐IR characterization. Therefore, it was suggested that CoPcTS molecules be adsorbed on the surface of TiO 2 in a flat‐lying mode while CuPcS in a slanting one. UV‐Vis spectra show that the dispersed CuPcS and CoPcTS molecules exist in both forms of monomers and dimers.