Abstract: An outstanding novel aerodynamic pressure sensitive paint (PSP) was prepared, in which Ru²⁺ complexes were employed as oxygen sensitive probe molecules, which were dispersed into the thin film SiO₂ matrix prepared through sol-gel method. Their luminescent spectra and characteristic of oxygen quenching were measured, and the quantitative relationship between the luminescence and oxygen quenching was studied. The novel PSP was tested in a windtunnel simulating experiment in which a good linear relationship between emission intensity and oxygen partial pressure was achieved in a wider pressure variation range and the slope that represents the sensitivity of PSP for oxygen quenching reaches 0.75. This technique appeared a potential application in the aerodynamic pressure determination.

Key words: pressure-sensitive paint, visible photoluminescence, oxygen quenching, sol-gel