TETRAPHENYL BUTADIENE-BASED BRANCHED OLIGOARYLSILANES AND METHOD FOR PRODUCTION THEREOF Russian patent published in 2020 - IPC C08G77/60 

FIELD: chemistry.

SUBSTANCE: invention relates to chemical engineering of organosilicon compounds. Branched oligoarylsilanes based on tetraphenyl butadiene of general formula (I), where R denotes H or a substitute selected from: linear or branched C₁-C₂₀ alkyl groups; linear or branched C₁-C₂₀ alkyl groups separated by at least one oxygen atom; linear or branched C₁-C₂₀ alkyl groups separated by at least one sulphur atom; branched C₃-C₂₀ alkyl groups separated by at least one silicon atom; C₂-C₂₀ alkenyl groups; Ar means identical or different arylene or heteroarylene moieties selected from: substituted or unsubstituted thienyl-2,5-diil of general formula (II-a), substituted or unsubstituted phenyl-1,4-diiyl of general formula (II-b), substituted or unsubstituted 1,3-oxazole-2,5-diil of general formula (II-c), where R₁, R₂, R₃, R₄, R₅ independently from each other denote H or a substitute from said row for R; m is an integer from row 2 to 3; n denotes an integer from row 1 to 4. Also disclosed is a method of producing said branched oligoarylsilanes.

EFFECT: technical result is obtaining branched oligoarylsilanes based on tetraphenyl butadiene, having a unique combination of optical properties in different aggregate states: absorption spectrum in range from 200 to 400 nm with a maximum extinction coefficient of up to 30*10⁴ l/(mol*cm), a luminescence spectrum with a maximum in range of 435–468 nm, a Stokes shift of 4000 to 6000 cm^-1, a luminescence decay time from 1_3 to 2_4 ns and quantum yield of luminescence in solid aggregate state of not less than 70 %.

10 cl, 2 dwg, 2 tbl, 11 ex