Luminescence-based oxygen sensors

The key component of the oxygen sensor is in our case the dye ETHT 3001 which exhibits a strong luminescence at 620 nm upon irradiation at around 460 nm wavelength. This luminescence is efficiently quenched by oxygen which results in a decrease in luminescence signal directly related to the oxygen partial pressure.

sensor principle

For sensor purposes the complex ETHT 300x has to be imbedded in a suitable matrix (for instance plasticized polystyrene), i.e. a material which dissolves the complex and allows oxygen diffusion from the sample to the complex in the matrix.

structure of ETHT 300xETHT 300x tris(4,7-bis(4-n-alkylphenyl)-1,10-phenanthroline)ruthenium(II) perchlorate with n = 3 for x = 1, n = 6 for x = 2 and n = 8 for x = 3.


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