TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Disclosed): Preparation of (I) comprises coupling a boronic acid derivative of formula (1a) with a halo compound of formula (2a) in the presence of catalyzer and base to give (I).X = halo. SPECIFIC COMPOUNDS - 29 Compounds (I) are disclosed e.g. 5,5'-bis-(3,5-di-pyridin-4-yl-phenyl)-(2,2')bipyridinyl of formula (Ia), 5,5'-bis-(3,5-di-pyridin-3-yl-phenyl)-(2,2')bipyridinyl, 5,5'-bis-(3,5-di-pyridin-4-yl-phenyl)-3,3'-dimethyl-(2,2')bipyridinyl, 6,6'-bis-biphenyl-3-yl-(3,3')bipyridinyl and 6,6'-bis-(1,1';3',1'')terphenyl-5'-yl-(3,3')bipyridinyl.    EXAMPLE - 5,5'-Dibromo-(2,2')bipyridinyl (9.4 g), 3,5-dichlorophenylboric acid (20 g), toluene (376 ml), ethanol (188 ml), 2M sodium carbonate aqueous solution (66 ml), and bis(triphenylphosphine)palladium chloride (2.1 g) were prepared and reacted in a nitrogen atmosphere for 2 hours. The precipitated crystal was filtered and washed with water and methanol. The filtrate was separated and a toluene layer was fractioned. The toluene layer was washed with water twice. After washing, a crude material obtained by collecting toluene was mixed with the filtered precipitate crystal. This crude material was subjected to a silica gel process, and the resulting crude material was recrystallized from dimethylacetamide and purified to give 5,5'-bis-(3,5-dichlorophenyl)-(2,2')bipyridinyl. 5,5'-Bis-(3,5-dichlorophenyl)-(2,2')bipyridinyl (2 g), 4-(4,4,5,5-tetramethyl-(1,3,2)dioxaborolane-2-yl)-pyridine (6.4 g), 1,4-dioxane (96 ml), 1.35M potassium phosphate aqueous solution (32 ml), tris(dibenzylideneacetone)dipalladium(0) (0.4 g), and tricyclohexylphosphine (0.31 g) were placed and reacted in a nitrogen atmosphere for 30 hours. The precipitated crystal was filtered, and washed with water and methanol. After drying, a crude material was purified with a silica gel column using a developing solvent of chloroform-methanol mixture solvent to give 5,5'-bis-(3,5-di-pyridin-4-yl-phenyl)-(2,2')bipyridinyl (2 g, 71.4%).