TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation: None given. Preferred Derivative: The trinaphthyl monoamine derivative is preferably of formulae (4-10). Preferred Element: An organic electroluminescent element has an organic thin film layer containing trinaphthyl monoamine derivative, and a light emitting layer between a cathode and an anode. Preferred Compound: The light emitting layer contains anthracene compound of formula (2a), pyrene compound of formula (2b), triphenylamine compound of formula (2c), and aromatic compound of formula: (Ar19-Ar'(-Ar18)-Ar20).Ar11,Ar12=group derived from 6-20C aromatic ring, 6-50C aryl, aralkyl, aryloxy or arylthio, 1-50C alkyl, 3-50C cycloalkyl, 1-50C alkoxy, or 2-20C alkoxycarbonyl optionally substituted by silyl, carboxyl, halogen, cyano, nitro or hydroxyl;R11-R18=H, 6-50C aryl, aralkyl, aryloxy or arylthio, 5-50C heteroaryl, 1-50C alkyl or alkoxy, 3-50C cycloalkyl, or 2-50C alkoxycarbonyl optionally substituted by silyl, carboxyl, halogen, cyano, nitro or hydroxyl;Ar13,Ar14=6-50C aryl (all optionally substituted);L1,L2=phenylene, naphthalenylene, fluorenylene or dibenzosilolylene (all optionally substituted), L1 or Ar13 couples with either of 1 and 5th-position of pyrene, and L2 or Ar14 couples with either of 1 and 6th-position of pyrene;Ar15-Ar17=anthracene group, phenanthrene group or pyrene group;R19-R21=H or substituent;Ar18-Ar20=6-50C optionally substituted aryl, 10-20C condensed aryl ring or 6-20C condensed heteroaryl ring;Ar'=trivalent group derived from aromatic ring or complex aromatic ring;m,s=0-2;n=1-4;andt=0-4.Preferred Material: An organic electroluminescent material contains trinaphthyl monoamine derivative, and solvent. Preferred Definitions:    a-c=1-7.    SPECIFIC COMPOUNDS - 28 specific trinaphthyl monoamine derivatives are disclosed, such as tris-(6-((E)-styryl)-naphthalen-2-yl)-amine of formula (1a), naphthalen-2-yl-di-naphthalen-1-yl-amine, di-naphthalen-2-yl-naphthalen-1-yl-amine, tri-naphthalen-2-yl-amine, and (1,1')binaphthalenyl-4-yl-di-naphthalen-2-yl-amine.    EXAMPLE - 2-Bromo-naphthaldehyde (23.5 g), benzyl diethoxy phosphonate (7.7 g), t-butoxy potassium (13.5 g) and tetrahydrofuran (200 ml) were stirred at room temperature for 12 hours, water was added and recrystallized to obtain 2-bromo-6-stearyl naphthalene. The obtained compound (15.4 g), acetamide (1.7 g), iodinated copper (0.48 g), potassium carbonate (13.8 g) and xylene (500 ml) were stirred to obtain bis(2-styryl naphthalene)amine. The obtained compound (4.7 g), 2-bromo-6-styryl naphthalene (3.1 g), palladium acetate (0.03 g), tri-t-butyl phosphine (0.06 g), t-butoxy sodium and toluene (100 ml) were heated at 100 degrees C for 12 hours, the mixture was filtered and dried to obtain tris-(6-((E)-styryl)-naphthalen-2-yl)-amine.