NOVELTY - Substituted tetraarylbenzene compounds (I) are new.    USE - (I) are useful as a host or matrix material (preferably in combination with an emitter) in one or more emitting layers, which are useful in an electronic device, preferably organic electroluminescent devices (organic LED and polymeric LED), organic integrated circuits, organic field-effect transistors, organic thin-film transistors, organic light-emitting transistors, organic solar cells, organic optical detectors, organic photoreceptors, organic field-quench devices, light-emitting electrochemical cells or organic laser diodes. (I) are useful for the therapy, prophylaxis and/or diagnosis of diseases and/or cosmetic conditions (all claimed). (I) are useful for: treating psoriasis, skin aging, cellulite, actinic keratosis, skin ulcers, acne, acne rosacea, scars by acne, bacterial acne, jaundice, newborn jaundice, vitiligo, skin cancer, Crigler-Najjar syndrome, dermatitis, atopic dermatitis, diabetic skin ulcers, rheumatoid arthritis, pain, wounds, edema, Paget's disease, allergy, viral infections, warts, genital warts, winter depression, sleeping sickness and muscle pain; and preserving liquids, preferably drinking water and other drinks. No biological data given.    ADVANTAGE - (I) provide electronic device with high efficiency, high thermal stability, good current-voltage characteristics with low threshold voltages, and long service life. (I) exhibit good solubility in aryl organic solvents and good film forming properties.    DETAILED DESCRIPTION - Substituted tetraarylbenzene compounds of formula (I) are new.    X=CH (preferred) or N;    Y 1=CR 1, N, P or P(R 1) 2; either    m-p=0-5, provided that when n-p is greater than or equal to 1, then Y 1is CR 1; or    m+n+o+p=1-4, where at least one of the rings A-D in the meta position with Z is optionally replaced;    R 1=linear 1-40C-alkyl, linear 1-40C-alkoxy, linear 1-40C-thioalkoxy, linear 2-40C-alkenyl, linear 2-40C-alkynyl, branched or cyclic 3-40C-alkyl, 3-40C-alkenyl, 3-40C-alkynyl, 3-40C-alkoxy, 3-40C-alkylalkoxy, 3-40C-thioalkoxy (where one or more non-adjacent CH 2groups are replaced by R 2C=CR 2, CC, Si(R 2) 2, Ge(R 2) 2, Sn(R 2) 2, C=O, C=S, Se=C, C=NR 2, P(=O)(R 2), SO, SO 2, NR 2, O, S or CONR 2and one or more H atoms are replaced by D, F, Cl, Br, I, CN or NO 2), 5-60 membered (hetero)aryl ring system, 5-60 membered (hetero)aryloxy or arylalkoxy, 10-40 membered di(hetero)arylamino, 10-40 membered arylheteroarylamino (all optionally substituted by R 2), H, D, F, Cl, Br, I, N (R 2) 2, CN, NO 2, Si(R 2) 3, B(OR 2) 2, C(=O)R 2, P(=O)(R 2) 2, S(=O)R 2, S(=O) 2R 2, OSO 2R 2, a combination of two or more of the above groups or a crosslinkable group (Q);    R 2=linear 1-40C-alkyl, linear 1-40C-alkoxy, linear 1-40C-thioalkoxy, linear 2-40C-alkenyl, linear 2-40C-alkynyl, branched or cyclic 3-40C-alkyl, branched or cyclic 3-40C-alkenyl, branched or cyclic 3-40C-alkynyl, branched or cyclic 3-40C-alkoxy, branched or cyclic 3-40C-alkylalkoxy, branched or cyclic 3-40C-thioalkoxy (where one or more non-adjacent CH 2groups are optionally replaced by R 3C=CR 3, CC, Si(R 3) 2, Ge(R 3) 2, Sn(R 3) 2, C=O, C=S, C=Se, C=NR 3, P(=O)(R 3), SO, SO 2, NR 3, O, S or CONR 3and one or more H atoms are optionally replaced by D, F, Cl, Br, I, CN or NO 2), 5-60 membered (hetero)aryl ring, 5-60 membered (hetero)aryloxy, 5-60 membered arylalkoxy, 10-40 membered di(hetero)arylamino, 10-40 membered arylheteroarylamino or a combination of two or more of the above groups (all optionally substituted by R 3), H, D, F, Cl, Br, I, N(R 3) 2, CN, NO 2, Si(R 3) 3, B(OR 3) 2, C(=O)R 3, P(=O)(R 3) 2, S(=O)R 3, S(=O) 2R 3or OSO 2R 3; or    2R 2=a monocyclic or polycyclic, aliphatic or aromatic ring system; either    R 3=H, D, F or 1-20C-aliphatic or (hetero)aryl hydrocarbon (in which one or more H atoms are optionally replaced by F); or    2R 3=a mono-or polycyclic, aliphatic or aromatic ring system; and    Z=R 1, provided that at least one of Z is 5-60 membered (hetero)aryl group.    INDEPENDENT CLAIMS are included for:    (1) a formulation comprising (I) and at least one solvent; and    (2) a composition comprising (I) and at least one further organic functional material comprising emitter (preferably fluorescent and/or phosphorescent emitter) (preferred), host materials, matrix materials, electron transport materials, electron injection materials, hole transport materials, hole injection materials, electron-blocking materials, hole blocking materials or exciton-blocking materials.