NOVELTY - Substituted isoindole compounds (I) are new.    USE - (I) is useful in an organic electroluminescence device such as an organic LED, an organic solar cell, an organophotoreceptor and an organic thin film transistor used in a display device of an electronic device (all claimed) such as a mobile communication terminal including cellular phone, personal digital assistant, electronic dictionary, a portable media player, remote controller, game console, TV and computers.    ADVANTAGE - (I) provide excellent luminous efficiency, chromatic purity and lifetime and low driving voltage to the organic electroluminescence device.    DETAILED DESCRIPTION - Substituted isoindole compounds of formula (I) are new.    Either R1, R2 = (a) H, D, tritium or halo, (b) H, D, tritium, halo, 2-20C-alkenyl, 1-20C-alkoxy, 6-20C-aryl, deuterium substituted 6-20C-aryl, 7-20C-arylalkyl, 8-20C-arylalkenyl, 2-20C-heterocyclic group or 1-50C-alkyl comprising nitrile or acetylene, (c) H, D, tritium, halo, 1-20C-alkyl, 2-20C-alkenyl, 1-20C-alkoxy, 6-20C-arylamine, 6-60C-aryl, deuterium substituted 6-20C-aryl, 7-20C-arylalkyl, 8-20C arylalkenyl, 2-20C-heterocyclic, nitrile, acetylene or 2-60C-heterocyclic (optionally substituted) comprising O, N, S, Si or P, (d) H, D, tritium, halo, 1-20C-alkyl, 2-20C-alkenyl, 1-20C-alkoxy, 6-20C-arylamine, 6-60C-aryl, deuterium substituted 6-20C-aryl, 7-20C-arylalkyl, 8-20C arylalkenyl, 2-20C-heterocyclic or optionally substituted 2-20C-alkenyl comprising nitrile or acetylene, (e) H, D, tritium, halo, 2-20C-alkenyl, 1-20C-alkoxy, 6-20C-aryl, deuterium substituted 6-20C-aryl, 7-20C-arylalkyl, 8-20C-aylalkenyl, 2-20C-heterocyclic group or 1-30C-alkoxy comprising nitrile or acetylene, or (f) H, D, tritium, halo, 1-20C-alkyl, 1-20C-alkoxy, 1-20C-alkylamine, 1-20C-alkylthiophene, 6-20C-arylthiophene, 2-20C-alkenyl, 2-20C-alkynyl, 3-20C-cycloalkyl, 6-20C-aryl, 6-20C-aryl (substituted with deuterium), 8-20C-arylalkenyl, silane, boron, germanium, 2-20C-heterocyclicring comprising 6-60C-aryl (optionally substituted); or    R1R2 = spiro compound;    R3-R10 = (a) H, D, tritium or halo, (b) H, D, tritium, halo, 2-20C-alkenyl, 1-20C-alkoxy, 6-20C-aryl, deuterium substituted 6-20C-aryl, 7-20C-arylalkyl, 8-20C-arylalkenyl, 2-20C-heterocyclic group or 1-50C-alkyl comprising nitrile or acetylene, (c) H, D, tritium, halo, 1-20C-alkyl, 2-20C-alkenyl, 1-20C-alkoxy, 6-20C-arylamine, 6-60C-aryl, deuterium substituted 6-20C-aryl, 7-20C-arylalkyl, 8-20C arylalkenyl, 2-20C-heterocyclic, nitrile, acetylene or 2-60C-heterocyclic (optionally substituted) comprising heteroatoms (O, N, S, Si or P), (d) H, D, tritium, halo, 1-20C-alkyl, 2-20C-alkenyl, 1-20C-alkoxy, 6-20C-arylamine, 6-60C-aryl, deuterium substituted 6-20C-aryl, 7-20C-arylalkyl, 8-20C arylalkenyl, 2-20C-heterocyclic or optionally substituted 2-20C-alkenyl comprising nitrile or acetylene, (e) H, D, tritium, halo, 2-20C-alkenyl, 1-20C-alkoxy, 6-20C-aryl, deuterium substituted 6-20C-aryl, 7-20C-arylalkyl, 8-20C-aylalkenyl, 2-20C-heterocyclic group or 1-30C-alkoxy comprising nitrile or acetylene, (f) H, D, tritium, halo, amino, nitrile, nitro, 1-20C-alkyl, 2-20C-alkenyl, 1-20C-alkoxy, 3-30C-cycloalkyl group, 6-60C-aryl or 6-60C-arylamine optionally substituted with 2-60C-heteroring, (g) H, D, tritium, halo, 2-20C-alkenyl, 1-20C-alkoxy, 6-60C-aryl, deuterium substituted 6-60C-aryl, 7-20C-arylalkyl, 8-20C-arylalkenyl, 2-20C-heterocyclic group or optionally substituted 6-30C-aryloxy comprising nitrile or acetylene or (h) H, D, tritium, halo, 1-20C-alkyl, 1-20C-alkoxy, 1-20C-alkylamine, 1-20C-alkylthiophene, 6-20C-arylthiophene, 2-20C-alkenyl, 2-20C-alkynyl, 3-20C-cycloalkyl, 6-20C-aryl, 6-20C-aryl (substituted with deuterium), 8-20C-arylalkenyl, silane, boron, germanium, 2-20C-heterocyclicring comprising 6-60C-aryl (optionally substituted);    L = (a) nitro, nitrile, halo, 1-20C-alkyl, 1-20C-alkoxy, 6-20C-aryl, 2-20C-heterocycloalkyl ring or optionally substituted 6-60C-arylene comprising amino, (b) H, D, tritium, halo, 2-20C-alkenyl, 1-20C-alkoxy, 6-20C-aryl, deuterium substituted 6-20C-aryl, 7-20C-arylalkyl, 8-20C-arylalkenyl, 1-50C-alkyl, 2-20C-heteroring or optionally substituted fluorine comprising nitrile or acetylene, or (c) nitro, nitrile, halo, 1-20C-alkyl, 1-20C-alkoxy, 6-20C-aryl, 2-20C-heteroring group or optionally substituted 3-60C-heteroaryl including amino group; and    Ar1, Ar2 = (a) H, D, tritium, halo, 1-20C-alkyl, 1-20C-alkoxy, 1-20C-alkoxy, 1-20C-alkylamine, 1-20C-alkylthiophene, 6-20C-arylthiophene, 2-20C-alkenyl, 2-20C-alkynyl, 3-20C-cycloalkyl, 6-20C-aryl, 6-20C-aryl (substituted with deuterium), 8-20C-arylalkenyl, silane, boron, germanium, 2-20C-heterocyclicring comprising 6-60C-aryl (optionally substituted), (b) H, D, tritium, halo, 1-20C-alkyl, 2-20C-alkenyl, 1-20C-alkoxy, 6-20C-arylamine, 6-60C-aryl, deuterium substituted 6-20C-aryl, 7-20C-arylalkyl, 8-20C arylalkenyl, 2-20C-heterocyclic, nitrile, acetylene or 2-60C-heterocyclic (optionally substituted) comprising O, N, S, Si or P, (c) H, D, tritium, halo, 1-20C-alkyl, 2-20C-alkenyl, 1-20C-alkoxy, 6-20C-arylamine, 6-60C-aryl, deuterium substituted 6-20C-aryl, 7-20C-arylalkyl, 8-20C arylalkenyl, 2-20C-heterocyclic or optionally substituted 2-20C-alkenyl comprising nitrile or acetylene, (d) H, D, tritium, halo, 2-20C-alkenyl, 1-20C-alkoxy, 6-20C-aryl, deuterium substituted 6-20C-aryl, 7-20C-arylalkyl, 8-20C-aylalkenyl, 2-20C-heterocyclic group or 1-30C-alkoxy comprising nitrile or acetylene, (e) H, D, tritium, halo, 2-20C-alkenyl, 1-20C-alkoxy, 6-20C-aryl, deuterium substituted 6-20C-aryl, 7-20C-arylalkyl, 8-20C-arylalkenyl, 2-20C-heterocyclic group or 1-50C-alkyl comprising nitrile or acetylene, (f) H, D, tritium, halo, amino, nitrile, nitro, 1-20C-alkyl, 2-20C-alkenyl, 1-20C-alkoxy, 3-20C-heterocycloalkyl, 6-60C-aryl or 6-60C-arylamine optionally substituted with 2-60C-heteroring, (g) H, D, tritium, halo, 2-20C-alkenyl, 1-20C-alkoxy, 6-60C-aryl, deuterium substituted 6-60C-aryl, 7-20C-arylalkyl, 8-20C-arylalkenyl, 2-20C-heterocyclic group or optionally substituted 6-30C-aryloxy comprising nitrile or acetylene, or (h) H, D, tritium, halo, 2-20C-alkenyl, 1-20C-alkoxy, 6-20C-aryl, deuterium substituted 6-20C-aryl, 7-20C-arylalkyl, 8-20C-arylalkenyl, 1-50C-alkyl, 2-20C-heteroring or optionally substituted fluorine comprising nitrile or acetylene.    INDEPENDENT CLAIMS are included for:    (1) an organic electroluminescence device comprising organic material layers including (I); and    (2) an electronic device comprising a display device including the organic electroluminescence device, and a control unit for driving the display device.