TECHNOLOGY FOCUS - ELECTRONICS - Preferred Components: The organic electroluminescence device comprises a cathode, an anode and an organic thin-film layer between the cathode and the anode. The organic thin-film layer comprises an organic luminescent layer and the polyaryl substituted pyridine derivate.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (claimed): Polyaryl substituted pyridine derivative (I) or (II) is prepared by dissolving 2-bromo-1-acetophenone with substituents R4, R5, R4', or R5', bromoethyl ethanone with substituents R5, Ar2, R5', or Ar2', or bromoaromatic heterocyclic ethanone with pyridine raw materials into organic solvent at a ratio of 1: 1, stirring, and filtering to obtain pyridine bromine product; and under the protection of inert gas, mixing the pyridine bromine product, dialdehyde with substituents R1 and acetophenone with substituents R2, R3, R2', R3', aryl ethanone with substituents R2, Ar1, R2', or Ar1' or aryl heterocyclic ethanone with substituents R2, Ar1, R2', Ar1' at a molar ratio of 2: 1: 2, and mixing with ammonium acetate in a catalytic concentration, then dissolving the mixture in glacial acetic acid for refluxing, and filtering the product via column chromatography or recrystallization. Preferred Components: The organic solvent is methanol, ethanol, tetrahydrofuran, dichloromethane or dioxane. Preferred Definitions:    unsubstituted 1-20C alkyl=methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, iso-butyl, tert-butyl, n-amyl, n-hexyl, n-heptyl or n-octyl;    substituted 1-20C alkyl=hydroxymethyl, 1-hydroxyethyl, 2-hydroxyethyl, 2-hydroxyisobutyl, 1,2-dihydroxyethyl, 1,3-dihydroxyisopropyl, 2,3-dihydroxy-tertbutyl, 1,2,3-trihydroxypropyl, chloromethyl, 1-chloroethyl, 2-chloroethyl, 2-chloroisobutyl, 1,2-dichloroethyl, 1,3-dichloroisopropyl, 2,3-dichloro-tertbutyl, 1,2,3-trichloropropyl, bromomethyl, 1-bromoethyl, 2-bromoethyl, 2-bromoisobutyl, 1,2-dibromoethyl, 1,3-dibromoisopropyl, 2,3-dibromo-tertbutyl, 1,2,3-tribromopropyl, iodomethyl, 1-iodoethyl, 2-iodoethyl, 2-iodoisobutyl, 1,2-diiodoethyl, 1,3-diiodoisopropyl, 2,3-diiodo-tertbutyl, 1,2,3-triiodopropyl, aminomethyl, 1-aminoethyl, 2-aminoethyl, 2-aminoisobutyl, 1,2-diaminoethyl, 1,3-diaminoisopropyl, 2,3-diamino-tertbutyl or 1,2,3-triaminopropyl;    unsubstituted 5-20C cycloalkyl=cyclopropyl, cyclobutyl, cyclopentyl or cyclohexyl;    substituted 5-20C cycloalkyl=4-methylcyclohexyl, adamantyl or norbornyl;    1-20C alkoxy=-OR;    R=alkyl (preferably unsubstituted 1-20C alkyl or substituted 1-20C alkyl);    6-60C aralkyl=phenmethyl, 1-phenylethyl, 2-phenylethyl, or 1-phenylisopropyl;    6-60C aralkyl=phenmethyl, 1-phenylethyl, 2-phenylethyl, 1-phenylisopropyl, 2-phenylisopropyl, phenyl tertbutyl, alpha -naphthylmethyl, 1- alpha -naphthylethyl, 2- alpha -naphthylethyl, 1- alpha -naphthylisopropyl, 2- alpha -naphthylisopropyl, beta -naphthylmethyl, 1- beta -naphthylethyl, 2- beta -naphthyethyl, 1- beta -naphthylisopropyl, or 2- beta -naphthylisopropyl;    6-50C aryl=phenyl, 1-naphthyl, 2-naphthyl, 1-anthryl, 2-anthryl, 9-anthryl, 1-phenanthryl, 2-phenanthryl, 3-phenanthryl, 4-phenanthryl, 9-phenanthryl, 1-tetracene, 2-tetracene, 9-tetracene, 1-pyrenyl, 2-pyrenyl, 4-pyrenyl, 2-biphenyl, 3-biphenyl, 4-biphenyl, p-terphenyl-4-yl, p-terphenyl-3-yl, p-terphenyl-2-yl, m-terphenyl-4-yl, m-terphenyl-3-yl, m-terphenyl-2-yl, o-cresyl, m-cresyl, p-cresyl, p-tertbutyl phenyl, p-(2-phenylpropyl)phenyl, 3-methyl-2-naphthyl, 4-methyl-1-naphthyl, 4-methyl-1-anthryl, 4'-methyl biphenyl or 4''-tertbutyl-p-terphenyl-4-yl;    6-50C aryloxy=-OAr", or Q;    Q=2-pyrryl, 3-pyrryl, pyridyl, 2-pyridyl, 3-pyridyl, 4-pyridyl, 2-indolyl, 3-indolyl, 4-indolyl, 5-indolyl, 6-indolyl, 7-indolyl, 1-isoindolyl, 3-isoindolyl, 4-isoindolyl, 5-isoindolyl, 6-isoindolyl, 7-isoindolyl, 2-furyl, 3-furyl, 2-benzofuranyl, 3-benzofuranyl, 4-benzofuranyl, 5-benzofuranyl, 6-benzofuranyl, 7-benzofuranyl, 1-isobenzofuranyl, 3-isobenzofuranyl, 4-isobenzofuranyl, 5-isobenzofuranyl, 6-isobenzofuranyl, 7-isobenzofuranyl, 2-quinolyl, 3-quinolyl, 4-quinolyl, 5-quinolyl, 6-quinolyl, 7-quinolyl, 8-quinolyl, 1-isoquinolyl, 3-isoquinolyl, 4-isoquinolyl, 5-isoquinolyl, 6-isoquinolyl, 7-isoquinolyl, 8-isoquinolyl, 2-quinoxalyl, 5-quinoxalyl, 6-quinoxalyl, 1-carbazolyl, 2-carbazolyl, 3-carbazolyl, 4-carbazolyl, 1-phenanthridyl, 2-phenanthridyl, 3-phenanthridyl, 4-phenanthridyl, 6-phenanthridyl, 7-phenanthridyl, 8-phenanthridyl, 9-phenanthridyl, 10-phenanthridyl, 1-acridinyl, 2-acridinyl, 3-acridinyl, 4-acridinyl, 9-acridinyl, 1,7-phenanthrolin-2-yl, 1,7-phenanthrolin-3-yl, 1,7-phenanthrolin-4-yl, 1,7-phenanthrolin-5-yl, 1,7-phenanthrolin-6-yl, 1,7-phenanthrolin-8-yl, 1,7-phenanthrolin-9-yl, 1,7-phenanthrolin-10-yl, 1,8-phenanthrolin-6-yl, 1,8-phenanthrolin-7-yl, 1,8-phenanthrolin-9-yl, 1,8-phenanthrolin-10-yl, 1,9-phenanthrolin-2-yl, 1,9-phenanthrolin-3-yl, 1,9-phenanthrolin-3-yl, 1,9-phenanthrolin-4-yl, 1,9-phenanthrolin-5-yl, 1,9-phenanthrolin-6-yl, 1,9-phenanthrolin-7-yl, 1,9-phenanthrolin-8-yl, 1,9-phenanthrolin-10-yl, 1,10-phenanthrolin-2-yl, 1,10-phenanthrolin-3-yl, 1,10-phenanthrolin-3-yl, 1,10-phenanthrolin-4-yl, 1,10-phenanthrolin-5-yl, 2,9-phenanthrolin-1-yl, 2,9-phenanthrolin-3-yl, 2,9-phenanthrolin-4-yl, 2,9-phenanthrolin-5-yl, 2,9-phenanthrolin-6-yl, 2,9-phenanthrolin-7-yl, 2,9-phenanthrolin-8-yl, 2,9-phenanthrolin-10-yl, 2,8-phenanthrolin-1-yl, 2,8-phenanthrolin-3-yl, 2,8-phenanthrolin-4-yl, 2,8-phenanthrolin-5-yl, 2,8-phenanthrolin-6-yl, 2,8-phenanthrolin-7-yl, 2,8-phenanthrolin-9-yl, 2,9-phenanthrolin-10-yl, 2,7-phenanthrolin-1-yl, 2,7-phenanthrolin-3-yl, 2,7-phenanthrolin-4-yl, 2,7-phenanthrolin-5-yl, 2,7-phenanthrolin-6-yl, 2,7-phenanthrolin-8-yl, 2,7-phenanthrolin-9-yl, 2,7-phenanthrolin-10-yl, 1-phenazinyl, 2-phenazinyl, 1-phenothiazinyl, 2-phenothiazinyl, 3-phenothiazinyl, 4-phenothiazinyl, 1-phenoxazinyl, 2-phenoxazinyl, 3-phenoxazinyl, 4-phenoxazinyl, 2-oxazolyl, 4-oxazolyl, 5-oxazolyl, 2-oxadiazoyl, 5-oxadiazoyl, 3-furazano, 2-thienyl, 3-thienyl, 2-methylpyrrol-1-yl, 2-methylpyrrol-3-yl, 2-methylpyrrol-4-yl, 2-methylpyrrol-5-yl, 3-methylpyrrol-1-yl, 3-methylpyrrol-2-yl, 3-methylpyrrol-4-yl, 3-methylpyrrol-5-yl, 2-tertbutylpyrrol-4-yl, 3-(2-phenylpropyl)pyrrol-1-yl, 2-methyl-1-indoyl, 4-methyl-1-indoyl, 2-methyl-3-indoyl, 4-methyl-3-indoyl, 2-tertbutyl-1-indoyl, 4-tertbutyl-1-indoyl, 2-tertbutyl-3-indoyl, or 4-tertbutyl-3-indoyl;    Ar"=6-50C aryl;    5-50C aromatic heterocyclic group=1-pyrryl or Q;    fluoromethyl=monofluoro, difluoro or trifluoro methyl; and    2-20C ester functional group=methyl ester, ethyl ester, propyl ester, isopropyl ester, n-butyl ester, sec-butyl ester, iso-butyl ester, tert-butyl ester, n-amyl ester, n-hexyl ester, n-heptyl ester or n-octyl ester group.