TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The tris(trialkylsilyl)silyl group is tris(trimethylsilyl)silyl. The conjugated oligomer is of formula (I), (IV), (V), (VI) or (VII). The compound (II) is prepared by silylating a dibromo derivative with organic compound of formula: (Alk3Si)3SiCl and butyl lithium followed by reaction with N-bromosuccinimide. The oligomer is chosen from 2-(4-(4-(4-(4-(1,1,1,3,3,3-hexamethyl-2-(trimethylsilyl)trisilan-2-yl)phenyl)phenyl)phenyl)phenyl)-1,1,1,3,3,3-hexamethyl-2-(trimethylsilyl)trisilane, 2-(4-(4-(4-(4-(4-(1,1,1,3,3,3-hexamethyl-2-(trimethylsilyl)trisilan-2-yl)phenyl)phenyl)phenyl)phenyl)phenyl)-1,1,1,3,3,3-hexamethyl-2-(trimethylsilyl)trisilane, 2-(4-(4-(4-(4-(4-(4-(4-(1,1,1,3,3,3-hexamethyl-2-(trimethylsilyl)trisilan-2-yl)phenyl)phenyl)phenyl)phenyl)phenyl)phenyl)phenyl)-1,1,1,3,3,3-hexamethyl-2-(trimethylsilyl)trisilane (a), 2-(4-(4-(4-(4-(4-(4-(1,1,1,3,3,3-hexamethyl-2-(trimethylsilyl)trisilan-2-yl)phenyl)phenyl)phenyl)phenyl)phenyl)phenyl)-1,1,1,3,3,3-hexamethyl-2-(trimethylsilyl)trisilane, 2-(5-(5-(5-(5-(5-(5-(5-(5-(5-(1,1,1,3,3,3-hexamethyl-2-(trimethylsilyl)trisilan-2-yl)furan-2-yl)furan-2-yl)furan-2-yl)furan-2-yl)furan-2-yl)furan-2-yl)furan-2-yl)furan-2-yl)furan-2-yl)-1,1,1,3,3,3-hexamethyl-2-(trimethylsilyl)trisilane, 2-(5-(5-(5-(5-(5-(5-(1,1,1,3,3,3-hexamethyl-2-(trimethylsilyl)trisilan-2-yl)furan-2-yl)furan-2-yl)furan-2-yl)furan-2-yl)furan-2-yl)furan-2-yl)-1,1,1,3,3,3-hexamethyl-2-(trimethylsilyl)trisilane, 2-(5-(5-(5-(5-(5-(1,1,1,3,3,3-hexamethyl-2-(trimethylsilyl)trisilan-2-yl)furan-2-yl)furan-2-yl)furan-2-yl)furan-2-yl)furan-2-yl)-1,1,1,3,3,3-hexamethyl-2-(trimethylsilyl)trisilane, 2-(5-(5-(5-(5-(1,1,1,3,3,3-hexamethyl-2-(trimethylsilyl)trisilan-2-yl)furan-2-yl)furan-2-yl)furan-2-yl)furan-2-yl)-1,1,1,3,3,3-hexamethyl-2-(trimethylsilyl)trisilane (b), 2-(5-(5-(5-(furan-2-yl)furan-2-yl)furan-2-yl)furan-2-yl)-1,1,1,3,3,3-hexamethyl-2-(trimethylsilyl)trisilane and 2-(5-(5-(furan-2-yl)furan-2-yl)furan-2-yl)-1,1,1,3,3,3-hexamethyl-2-(trimethylsilyl)trisilane. The oligomer is fluorescent. Preferred Process: The oligomer (b) is obtained by reacting (5-(5-(5-bromofuran-2-yl)furan-2-yl)furan-2-yl)trimethylsilane and (5-(5-(5-bromofuran-2-yl)furan-2-yl)furan-2-yl)tributylstannane with tetrakis(triphenylphosphine)palladium(0). The oligomer (a) is prepared by reacting 2-(4-(4-bromophenyl)phenyl)-1,1,1,2,3,3,3-heptamethyltrisilane and tributyl(4-(4-(4-(tributylstannyl)phenyl)phenyl)phenyl)stannane with tetrakis(triphenylphosphine)palladium(0). Preferred Definitions:    A1-An=phenyl, thiophene, furan, selenophene, perylene, fluoro or pyridyl.