TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (disclosed): 6,12-Dibromo chrysene is aminated by diaryl amine, to obtain asymmetrical aromatic-diamine derivative (1). Preferred Component: The asymmetrical aromatic-diamine derivative is blue-type luminescent material. The organic electroluminescent element comprises organic thin film layer having single layer or multiple layers containing light emitting layer provided between anode and cathode. Preferred Composition: The organic thin film layer comprises asymmetrical aromatic-diamine derivative. The light emitting layer comprises asymmetrical aromatic-diamine derivative as doping material, and anthracene derivative of formula (VI) or pyrene derivative of formula (VII), as host material.E,F'=group derived from 6-20C optionally substituted aromatic ring;R11-R18=6-50C aryl, 4-50C heteroaryl, 1-50C alkyl, 3-50C cycloalkyl, 1-50C alkoxy, aralkyl, 5-50C aryloxy, 5-50C aryl thio, alkoxycarbonyl or silyl (all optionally substituted), H, carboxyl, halo, cyano, nitro or hydroxyl;Ar1-Ar2=optionally substituted 6-50C aryl;L1,L2=phenylene, naphthalenylene, fluorenylene or dibenzosilolylene (all optionally substituted);s,q=0-2;p=1-4;andr=0-4.The alkyl portion of aralkyl is 1-50C alkyl. The aryl portion of aralkyl is 6-50C aryl. L1 or Ar5 is coupled with pyrene in 1-5 position. L2 or Ar6 is coupled with pyrene in 6-10 position. When p+r is even number, Ar5, Ar6, L1 and L2 is Ar5 and Ar6 and/or L1 and L2 are same or different. When Ar5=Ar6 and L1=L2, s and q and/or p and r are same or different. When s=q and p=r, L1 and L2 or Ar5 and Ar6 are coupled in same or different positions of pyrene. L1 and Ar5 are not substituted in 1 and 6 position of pyrene, and L2 and Ar6 are not substituted in 2 and 7 position of pyrene. Preferred Definitions:    A,B',C',D'=optionally substituted phenyl or naphthyl, preferably 1-20C alkyl-, 7-30C aralkyl- or 3-20C cycloalkyl-phenyl or naphthyl, more preferably biphenyl, 3-methylphenyl, 4-methyl phenyl, 3,5-dimethylphenyl, 3,4-dimethylphenyl, 3,4,5-trimethyl phenyl, 2,4,6-trimethyl phenyl, 3-ethylphenyl, 4-ethylphenyl, 4-n-propyl phenyl, 4-isopropyl phenyl, 4-n-butylphenyl, 4-t-butylphenyl, 4-cyclopentyl phenyl, 4-cyclohexyl phenyl, 1-naphthyl or 2-naphthyl.    SPECIFIC COMPOUNDS - 40 asymmetrical aromatic-diamine derivatives are disclosed such as 6-N-(3,4-dimethylphenyl)-12-N-(3,5-dimethylphenyl)-12-N-(4-methylphenyl)-6-N-phenylchrysene-6,12-diamine of formula (1a), 6-N-(4-methylphenyl)-12-N-(naphthalen-2-yl)-6-N,12-N-diphenylchrysene-6,12-diamine, 6-N,6-N-bis(4-methylphenyl)-12-N-(naphthalen-1-yl)-12-N-phenylchrysene-6,12-diamine, N,N-di-naphthalen-2-yl-N',N'-di-p-tolyl-chrysene-6,12-diamine and N-naphthalen-1-yl-N,N',N'-tri-p-tolyl-chrysene-6,12-diamine.    EXAMPLE - 3,5-dimethyl phenyl-4-methyl phenyl amine (in g) (3.5), 6-bromo-12-(3,4-dimethyl phenyl-phenylamino)chrysene (7.7), palladium acetate (230 mg), tri-t-butyl phosphine (323 mg), sodium-t-butoxide (2.9) and toluene were mixed and reacted, to obtain 6-N-(3,4-dimethylphenyl)-12-N-(3,5-dimethylphenyl)-12-N-(4-methylphenyl)-6-N-phenylchrysene-6,12-diamine (1a).