New D–A–D luminophores of the [1,2,5]thiadiazolo[3,4-d]pyridazine series |
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| Institution: | 1. P. N. Lebedev Physical Institute, Russian Academy of Sciences, 119991 Moscow, Russian Federation;2. N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russian Federation;3. Nanotechnology Education and Research Center, South Ural State University, 454080 Chelyabinsk, Russian Federation |
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| Abstract: | Three 1,2,5]thiadiazolo3,4-d]pyridazines containing 4,7-positioned indole-type substituents were synthesized from the corresponding 4,7-dibromo precursor employing the SNAr aromatic nucleophilic substitution. Photophysical properties and DFT calculations showed that the D–A–D dyes based on 1,2,5]thiadiazolo3,4-d]pyridazine core exhibited fluorescence in the near infrared region of the spectrum, which makes them promising for use as an active emitting layer in NIR-OLEDs as well as for other possible applications as an IR luminophore. |
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| Keywords: | indoles aromatic nucleophilic substitution luminescence donor–acceptor–donor structure synthesis NIR-OLEDs |
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