Dissolve high-purity copper nitrate with conductive water, filter, add excess high-purity NH3·H2O to the clarified liquid, filter out impurities and precipitate, and use high-purity nitric acid to neutralize the filtrate to precipitate hydrogen 8-hydroxyquinoline Copper. Filter, wash once with conductive water, add nitric acid to dissolve the precipitate, add high-purity ammonium carbonate to precipitate copper carbonate, then wash, spin dry, dry in an oven at 200°C, and burn at 450-550°C After 3 to 4 hours, spectrally pure 8-hydroxyquinoline Copper is obtained.

Nitrated copper wire or copper powder produces 8-hydroxyquinoline Copper

Dissolve Cuprous Chloride or copper powder in nitric acid to keep the copper excess, heat the solution to a pH of 3-4 to remove the iron hydroxide precipitate, and then mix it with a 10% sodium carbonate solution and boil it. The alkali metal salt precipitated, the supernatant was discarded, washed thoroughly with water, filtered and dried. The dry basic copper carbonate is heated and decomposed into black 8-hydroxyquinoline Copper powder under a small fire with sufficient stirring. If no carbon dioxide is generated, the decomposition is complete.