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Barometric sensitive coatings based upon osmium complexes dissolved in a fluoroacrylic polymer
Brenden Carlson1, John P Bullock, Timothy M Hance
1Department of Chemistry, University of Washington, P.O.Box 351700, Seattle, Washington 98195, USA. wcarlson@u.washington.edu
Analytical Chemistry
|January 2, 2009
Summary
Highly luminescent divalent osmium complexes were integrated into pressure-sensitive paints (PSP) for enhanced aerodynamic testing. These novel PSP formulations exhibit strong pressure response and low temperature dependence, making them ideal for vehicle design applications.
Area of Science:
- Materials Science
- Photochemistry
- Aerodynamics
Background:
- Pressure-sensitive paints (PSP) are crucial for measuring air pressure changes in vehicle design.
- Developing advanced luminescent materials is key to improving PSP performance.
Purpose of the Study:
- To incorporate highly luminescent divalent osmium complexes into PSP formulations.
- To evaluate the pressure sensitivity, temperature dependence, and photodegradation of these novel PSPs.
Main Methods:
- Synthesized divalent osmium complexes of the type [Os(N-N)2(L-L)]2+ or [Os(L-L)2(N-N)]2+.
- Dissolved complexes into a fluorinated polymer (FIB) at a 0.002:1.000 g/g ratio.
- Tested luminescence for pressure sensitivity, temperature effects, and photodegradation under 400 nm light.
Main Results:
- The novel PSPs demonstrated strong pressure response.
- Temperature dependence of luminescence was measured at -0.11% °C⁻¹.
- Several osmium complexes showed minimal photodegradation upon prolonged light exposure.
Conclusions:
- The developed divalent osmium complexes are highly suitable as luminescent dyes for advanced PSP applications.
- These materials offer significant potential for improving aerodynamic testing and vehicle design.
- The combination of pressure sensitivity, thermal stability, and photostability is advantageous for PSP technology.
