Abstract
The sulfonated phthalimidomethyl phthalocyanine hydroxyl aluminum (Al(OH)PcSP) is an amphiphilic photosensitizer which was proved to have the photodynamic activities against cancer. The electronic absorption spectra and aggregation state of the Al (OH)PcSP in aqueous alcoholic solutions and water were investigated. The results showed that the Al(OH)PcSP existed in the form of monomer in aqueous alcoholic solutions. The increase in the carbon chain and hydroxy of alcohol in solutions had no significant effects on the absorption spectra behaviors of Al(OH)PcSP. But in water, the Al(OH)PcSP existed in the equilibrium between monomer and dimer. The dimerization constant was 5.730 7×104 mol-1·L. The characteristic absorption peak of the Q band of the Al(OH)PcSP dimer was red shifted to 740.5 nm from that of the monomer (676.5 nm), which contrast with those of other metal phthalocyanines dimer. The study on the fluorescence spectra of Al(OH)PcSP in aqueous alcoholic solutions suggested that the fluorescence of the dimer was weak.
| Original language | English |
|---|---|
| Pages (from-to) | 676 |
| Number of pages | 1 |
| Journal | Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis |
| Volume | 20 |
| Issue number | 5 |
| Publication status | Published - 2000 |
| Externally published | Yes |
Keywords
- Aggregation state
- Amphiphilic photosensitizer
- Electronic absorption spectra
- Fluorescence spectra
- Metal phthalocyanines
ASJC Scopus subject areas
- Instrumentation
- Spectroscopy
