Photophysical Properties of Tetra (trifluoroethoxy) Phthalocyaninate Germanium

OBJECTIVE To evaluate the potential opplication of tetra(trifluoroethoxy) phthalocyaninate germanium (GePcF) by determining its photophysical properties. METHODS The UV-Vis spectrometer was used to measure the UV-Vis spectrum and molar extinction coefficient of GePcF. The concentration variation of singlet oxygen probe-9,10- dimethylanthracene (DMA) was first measured by HPLC to calculate the singlet oxygen quantum yield of GePcF. RESULTS The molar extinction coefficient was 1.36×10⁵ L·mol^-1·cm^-1 and the singlet oxygen quantum yield was 0.61. CONCLUSION　GePcF shows very high molar extinction coefficient and high singlet oxygen quantum yield. Both properties are needed as PDT photosensiter and GePcF has promising anti-tumor prospects for the further research.