A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, Safety of 2,4,5,6-Tetra(9H-carbazol-9-yl)isophthalonitrile, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 1416881-52-1, Name is 2,4,5,6-Tetra(9H-carbazol-9-yl)isophthalonitrile, molecular formula is C56H32N6. In a Article, authors is Tanimoto, Shuho，once mentioned of 1416881-52-1
A benzonitrile derivative substituted by five carbazoles (5CzBN), which emits thermally activated delayed fluorescence (TADF), was synthesized and evaluated. The organic light-emitting diode (OLED) containing 5CzBN demonstrated light-blue electroluminescence and a high external quantum efficiency of 14.8%.
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Reference：
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI