Registration of radical anions of Al, Ga, In tris-8-oxyquinolinates by magnetosensitive and spectrally resolved recombination luminescence in benzene solutions

Formation and recombination of transient radical anions of Al, Ga, and In tris-8-oxyquinolinates (Alq₃, Gaq₃, and Inq₃), the key species in certain organic electroluminescing devices, was studied in X-irradiated benzene solution. The spectra of recombination luminescence were obtained and effective yields of recombination luminescence referred to Alq₃ were estimated as 0.3 (Gaq₃) and 0.15 (Inq₃). Magnetic field effects in recombination luminescence involving the radical anions of the three oxyquinolinates were obtained, from which hyperfine coupling constants at the central ions were estimated as 0.45 (I_Al = 5/2), 0.8 (I_Ga = 3/2), and 0.6 (I_In = 9/2) mT for radical anions of Alq₃, Gaq₃, and Inq₃, respectively.

Recommended citation: Sergey N.V., Verkhovlyuk V.N., Kalneus E.V., Korolev V.V., Melnikov A.R., Burdukov A.B., Stass D.V., Molin Y.N. "Registration of radical anions of Al, Ga, In tris-8-oxyquinolinates by magnetosensitive and spectrally resolved recombination luminescence in benzene solutions" Chem. Phys. Lett.. 2012. 442. P. 32-37.
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