NOVELTY - Quinoline compounds (I) are new.    USE - (I) are useful in organic electroluminescent devices such as an organic LED, an organic solar cell, an organo photoreceptor and an organic thin film transistor, which are useful in an electronic device (all claimed) such as cellular phone, personal digital assistant, electronic dictionary, portable media player, remote controller, navigation system, game console, TV and computers.    ADVANTAGE - (I) have excellent driving characteristic, rapid response speed and color reproduction range, and improves the luminous efficiency, electric current density, brightness, driving voltage, thermal resistance, chromatic purity and lifetime of the device.    DETAILED DESCRIPTION - Quinoline compounds of formula (A1-L-N((Ar1)(Ar2))) (I) are new.    A1 = monovalent group of formula (Ia) or (Ib);    X = O, S, CR1aR2b or SiR1aR2b;    R1a, R2b = (a) halo, 1-60C alkyl, 1-60C alkoxy, 1-60C alkylamine, 1-60C alkyl thiophene, 6-60C aryl thiophene, 2-60C alkenyl, 2-60C alkynyl, 3-60C alkenyl, 6-60C aryl, 6-60C aryl substituted with deuterium, 8-60C alkenyl aryl, optionally substituted silane, optionally substituted boron, optionally substituted germanium, optionally substituted 2-20C heterocyclic or optionally substituted 6-60C aryl, (b) 1-20C alkyl, 2-20C alkenyl, 1-20C alkoxy, 6-20C aryl, deuterium-substituted 6-20C aryl, 7-20C alkylaryl, 8-20C arylalkenyl, 2-20C heterocyclic, nitrile or optionally substituted 1-50C alkyl, (c) halo, CN, NO2, 1-60C alkyl, 1-60C alkoxy, 1-60C alkylamine, 6-60C arylamine, 1-60C alkyl thiophene, 2-60C alkenyl, 2-60C alkynyl, 3-60C alkenyl, 6-60C aryl, 6-60C aryl substituted with deuterium, optionally substituted silane, optionally substituted boron, optionally substituted germanium, acetylene or 2-60C heterocyclic optionally substituted with heteroatoms including O, N or S, or (d) 6-60C aryl ring or 3-60C aliphatic ring; either    R1-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 alkylaryl, 8-20C arylalkenyl, 2-20C heterocyclic, nitrile or optionally substituted 1-50C alkyl, (c) H, D, tritium, halo, 1-20C-alkyl, 1-20C alkoxy, 1-20C alkylamine, 1-20C alkyl thiophene, 6-20C aryl thiophene, 2-20C alkenyl, 2-20C alkynyl, 3-20C cycloalkyl, 6-20C aryl, 6-20C aryl substituted with deuterium, 8-20C alkenyl aryl, optionally substituted silane, optionally substituted boron, optionally substituted germanium, optionally substituted 2-20C heterocyclic or optionally substituted 6-60C aryl, (d) H, D, tritium, halo, 1-20C alkyl, 2-20C alkenyl, 1-20C alkoxy, 6-20C arylamine, 6-60C aryl, 6-60C aryl substituted with deuterium, 7-20C alkylaryl, 8-20C alkenyl aryl, or 2-60C heterocyclic optionally substituted with acetylenem nitrile or heteroatoms including O, N, S or Si, (e) H, D, halo, amino, nitrile, nitro, 1-20C alkyl, 2-20C alkenyl, 1-20C alkoxy, 3-30C cycloalkyl, 6-60C aryl, 2-20C heterocyclic optionally substituted with 6-60C-aryl amine, (f) H, D, tritium, halo, 1-20C alkyl, 2-20C alkenyl, 1-20C alkoxy, 6-20C-aryl amine, 6-60C-aryl, deuterium-substituted 6-20C aryl, 7-20C alkylaryl, 8-20C arylalkenyl, 2-20C heterocyclic, nitrile or acetylene optionally substituted with 2-20C alkenyl, (g) H, D, tritium, halo, 2-20C-alkenyl group, 1-20C alkoxy, 6-20C-aryl, 6-20C-aryl substituted with deuterium, 7-20C-alkyl aryl, 8-20C-aryl alkenyl, 2-20C-heterocyclic ring, nitrile or acetylene substituted with substituent including optionally substituted 1-30C-alkoxy, or (h) H, D, tritium, halo, 2-20C alkenyl, 1-20C alkoxy, 6-20C aryl, deuterium-substituted 6-20C aryl, 7-20C alkylaryl, 8-20C arylalkenyl, 2-20C heterocyclic, nitrile or acetylene optionally substituted with 6-30C-aryloxy; or    R1R2R3R4R5R6R7R8R9R10 = optionally saturated ring; either    Ar1, Ar2 = (a) H, D, tritium, halo, 1-20C-alkyl, 1-20C-alkoxy, 1-20C alkylamine, 1-20C alkyl thiophene, 6-20C aryl thiophene, 2-20C alkenyl, 2-20C alkynyl, 3-20C alkenyl, 6-20C aryl, deuterium-substituted 6-20C-aryl, 8-20C alkenyl aryl, silane, boron, germanium or optionally substituted 6-60C-aryl including 2-20C heterocyclic substituents, (b) H, D, tritium, halo, 1-20C-alkyl, 2-20C-alkenyl, 1-20C-alkoxy, 6-20C-aryl amine, 6-60C-aryl, deuterium-substituted 6-20C-aryl, 7-20C-aryl, 8-20C-alkenyl aryl, 2-20C-heterocyclic ring optionally substituted with hetero atom (O, N, S, Si or P) and including nitrile and acetylene, (c) H, D, tritium, halo, 1-20C-alkyl, 2-20C-alkenyl, 1-20C-alkoxy, 6-20C-aryl amine, 6-60C-aryl, deuterium-substituted 6-20C-aryl, 7-20C-aryl, 8-20C-alkenyl aryl, 2-20C heterocyclic ring or optionally substituted 2-20C-alkenyl including nitrile and acetylene, (d) H, D, tritium, halo, 2-20C-alkenyl, 1-20C-alkoxy, 6-20C-aryl, deuterium-substituted 6-20C-aryl, 7-20C alkyl aryl, 8-20C aryl alkenyl, 2-20C heterocyclic ring or optionally substituted 1-30C-alkoxy including nitrile and acetylene-based substituents, (e) H, D, tritium, halo, 2-20C-alkenyl, 1-20C-alkoxy, 6-20C aryl, deuterium-substituted 6-20C-aryl, 7-20C-aryl, 8-20C-alkenylaryl, 2-20C heterocyclic ring or optionally substituted 1-50C-alkyl including nitrile and acetylene or (f) H, D, tritium, halo, 2-20C-alkenyl, 1-20C-alkoxy, 6-20C-aryl, deuterium-substituted 6-20C-aryl, 7-20C-alkyl aryl, 8-20C-alkenyl aryl, 1-50C-alkyl, 2-20C heterocyclic ring or optionally substituted fluorene including nitrile and acetylene substituents; or    Ar1Ar2 = optionally saturated ring; and    L = (a) nitro, nitrile, halo, 1-20C-alkyl, 1-20C-alkoxy, 6-20C-aryl, 2-20C-heterocyclic group or optionally substituted 6-60C-aryl including amino group, (b) H, D, tritium, halo, 2-20C-alkenyl, 1-20C-alkoxy, 6-20C-aryl, deuterium-substituted 6-20C-aryl, 7-20C-alkyl aryl, 8-20C-alkenyl aryl, 1-50C-alkyl, 2-20C heterocyclic ring or optionally substituted fluorene including nitrile and acetylene substituents, (c) nitro, nitrile, halo, 1-20C-alkyl, 1-20C-alkoxy, 6-20C-aryl, 2-20C heterocyclic group or optionally substituted 3-60C-heteroaryl group including amino groups, or (d) optionally substituted divalent aliphatic hydrocarbon.    INDEPENDENT CLAIMS are included for:    (1) an organic electroluminescent device comprising an organic layer including (Q); and    (2) an electronic device comprising the organic electroluminescent device and a control unit for driving the display device.