NOVELTY - Substituted 1,2,3,4,5,6,7,8,9,10-decamethyl-pyrene compounds (I) are new.    USE - In organic electronic device e.g. organic light emitting diode, organic thin film transistors (OTPT), organic photovoltaics (OPV), liquid crystals, micro-sensors for analytical applications or organic luminescence material used in displays, screen, light emitting devices, solar cells, remote controls, general lighting, digital microscopes, optical fiber transmission and/or telecommunications, infra-red illumination, movement sensors, in optical computer mice and opto-isolators (claimed).    ADVANTAGE - The compounds provide organic electronic devices having emitting spectra in the blue emission range and having good chemical stability in particular during multiple doping and de-doping; and provide electroluminescence having improved stability over the time and demonstrating improved life time in particular, with respect to the blue emission when used in organic electrodes. The electrochemical oxidation of the compounds results in formation of compounds present in polymers having good electrochemical stability during multiple doping and de-doping. The fluorescence emission is stable over the time with respect to the desired blue emission spectrum. Furthermore cyclic voltametry of polymer films containing the compounds demonstrates good stability during multiple doping and de-doping processes of the emissive layer. Hence, the lifespan of the organic electronic device containing the compounds is increased with increased efficiency of blue emission.    DETAILED DESCRIPTION - Substituted 1,2,3,4,5,6,7,8,9,10-decamethyl-pyrene compounds of formula (I) are new.    R1=H, R2 or R3;    R2=1-8C alkyl, 2-8C acyl, 3-7C cycloalkyl, 3-7C heterocycloalkyl, 4-12C aryl, 4-12C heteroaryl, 1-8C haloalkyl, 1-8C phenylalkyl, 1-8C hydroxyalkyl, 1-8C alkoxy, 1-8C thioalkoxy, 1-8C alkyloxycarbonyl, cyano, benzyl or phenyl (all optionally substituted) H, OH or halo;    R3=substituent of the formulae (II) or (III);    X=O, S or NR20;    R10-R12=H, Rk, Rl, Rm, OH, SH, CF3, CN, C(O)NH2, C(O)H, C(O)OH, Halo, NRkRl, SRk, S(O)Rk, S(O)Rk, S(O)ORk, S(O)2ORk, OS(O)Rk, OS(O)2Rk, OS(O)ORk, OS(O)2Rk, ORk, P(O)(ORk)(ORL), OP(O)ORk)/ORl), SiRkRlRm, C(O)Rk, C(O)ORk, C(O)N(Rl)Rk, OC(O)Rk, OC(O)Rk, OC(O)Rk or OC(O)N/Rk)Rl ;    R20, Rk, Rl or Rm=1-8C alkyl, 2-8C acyl, 3-7C cycloalkyl, 3-7C heterocycloalkyl, 4-12C aryl, 4-12C heteroaryl, 1-8C haloalkyl, 1-8C phenylalkyl, 1-8C hydroxyalkyl, 1-8C alkoxy, 1-8C thioalkoxy, 1-8C alkyloxycarbonyl, cyano, benzyl or phenyl (all optionally substituted) or H.    Provided that at least one of R1 is R3. INDEPENDENT CLAIMS are included for the following:    (1) polymer, oligomer or dendrimer comprising at least one compound of formula (I), where R1 or R2 is bond to the polymer, oligomer or dendrimer, or at least two of R1, R2, R10, R11 or R12 is chemical bond;    (2) preparation of compound of formula (I); and    (3) organic electronic device comprising at least one compound (I) or the polymer, oligomer or dendrimer comprising (I).