| Summary: | Donor–acceptor–donor (D–A–D)-type molecules are considered as a promising class of NIR fluorescence materials. In this communication, 4,7-di(9<i>H</i>-carbazol-9-yl)-[1,2,5]oxadiazolo[3,4-<i>d</i>]pyridazine was obtained by dehydrogenation of 4,7-bis(1,2,3,4,4a,9a-hexahydro-9<i>H</i>-carbazol-9-yl)-[1,2,5]oxadiazolo[3,4-<i>d</i>]pyridazine with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone in toluene. The structure of the synthesized compound was established by elemental analysis; high-resolution mass spectrometry; <sup>1</sup>H, <sup>13</sup>C NMR, IR, and UV spectroscopy; and mass spectrometry. The photophysical properties of the title compound were studied and compared with spectral data of the [1,2,5]thiadiazolo[3,4-<i>d</i>]pyridazine analogue.
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