METHOD FOR OBTAINING ORGANOMETALLIC COMPLEXES BASED ON 8-OXYQUINOLINE IN THE VOLUME OF HIGHLY POROUS AEROGELS Russian patent published in 2023 - IPC C09K11/06 C01B33/158 

FIELD: organometallic complexes.

SUBSTANCE: present invention relates to a method for producing organometallic complexes based on 8-hydroxyquinoline in the bulk of highly porous aerogels, consisting of three sequential stages, in the first of which a gel is obtained using “sol-gel” technology, where silicon alkoxide is used as a precursor and a solvent – organic solvents, as a catalyst for the preparation of the sol – an aqueous solution of hydrochloric acid, and as a catalyst at the gelation stage – an aqueous solution of ammonium hydroxide; at the second stage, the gel is kept three times with stirring in a solution of salt or coordination hydroxide s-, p-, d -, f-element in an organic solvent with a concentration of 0.01-5% by weight for at least 3 hours, and at the third stage, the gel mixed with the hydroxide of the coordination s-, p-, d-, f-element is subjected to supercritical drying, for which gels with coordination elements are placed in a high-pressure apparatus together with 8-hydroxyquinoline powder, the amount of which is determined by the stoichiometry of the chemical reaction of 8-hydroxyquinoline with coordination s-, p-, d-, f-elements, the apparatus is sealed and filled with carbon dioxide to a pressure of 120 bar at temperature 40°C and kept for 2 hours, after which a constant flow of carbon dioxide is provided for 8 hours at a flow rate of at least 1 kg/h, and then after supercritical drying, supercritical adsorption is carried out, for which the resulting aerogels are placed for 24 hours in an apparatus for supercritical adsorption together with 8-hydroxyquinoline powder and phosphorus (V) oxide desiccant, the apparatus is sealed and filled with carbon dioxide to a pressure of at least 120 bar at a temperature of 40°C.

EFFECT: present invention provides a simplified method for preparing organometallic complexes with luminescent properties for use in light-emitting products and increasing emission uniformity.

2 cl