TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Claimed): The condensed polycyclic aromatic compound (I) is synthesized by providing composition containing organic solvent and condensed polycyclic aromatic compound (IIa), and substituting halogen atom of condensed polycyclic aromatic compound (IIa) by substituent chosen from 1-20C alkyl group, 2-20C alkenyl group, 2-20C alkynyl group, optionally substituted 4-20C aromatic group, 2-10C ketone group, 1-20C amino group, 1-20C amide group, 1-20C imide group and 1-20C sulfide group. Preferred Composition: The condensed polycyclic aromatic compound (I) is of formula (II) or (III). The condensed polycyclic aromatic compound (I) is 3,15-bis(thiophen-2-yl)-12,24-dithiahexacyclo(11.11.0.02,11.04,9.014,23.016,21)tetracosa-1(13),2(11),3,5,7,9,14(23),15,17,19,21-undecaene. The condensed polycyclic aromatic compound (IIa) is 3,15-dibromo-12,24-dithiahexacyclo(11.11.0.02,11.04,9.014,23.016,21)tetracosa-1(13),2(11),3,5,7,9,14(23),15,17,19,21-undecaene or 3,15-dichloro-12,24-dithiahexacyclo(11.11.0.02,11.04,9.014,23.016,21)tetracosa-1(13),2(11),3,5,7,9,14(23),15,17,19,21-undecaene. The condensed polycyclic aromatic compound (IIIa) is 12,24-dithiahexacyclo(11.11.0.02,11.04,9.014,23.016,21)tetracosa-1(13),2(11),3,5,7,9,14(23),15,17,19,21-undecaene.R1-R3=1-10C alkyl;andRr=H, halo, hydroxy, amide, mercapto, cyano, 1-10C alkyl, 2-10C alkenyl, 2-10C alkynyl, 1-10C alkoxy, 4-10C optionally substituted aromatic group, 1-10C ester, 1-10C ether, 1-10C ketone, 1-10C amino, 1-10C amide, 1-10C imide or 1-10C sulfide.Preferred Process: The cyano group-containing compound (i) is synthesized by substituting triflate group of sulfur-containing compound (g) by cyano group. The aldehyde-containing compound (b) is synthesized by oxidizing hydroxyl group of hydroxyl group-containing compound (n). The hydroxyl group-containing compound (n) is obtained by reducing methyl ester group of carboxyl group-containing compound (m). The carboxyl group-containing compound (m) is obtained by substituting triflate group of triflate group-containing compound (XX) by thiomethyl group. The triflate group-containing compound (XX) is obtained by substituting hydroxyl group of biphenyl-containing compound of formula (k) by triflate group.    TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The aromatic polymer has biphenyl-containing repeating unit of formula (V-1), and molecular weight of 1000 or more.G1,G4=bond, H, halo, 1-20C alkyl, 2-20C alkenyl, 2-20C alkynyl, 4-20C optionally substituted aromatic group, 2-10C ketone, 1-20C amino, 1-20C amide, 1-20C imide, 1-20C sulfide or 1-40C alkylsilyl alkynyl;andQ0=bond or bivalent group. EXAMPLE - Dinaphthothienothiophene (in mg) (100.7) and aluminum chloride (17.7) were mixed under nitrogen atmosphere. Chloroform (5 ml) was added to mixture and cooled at 0 degrees C. N-chlorosuccinimide (78.7) was added to mixture and stirred for 1.5 hours. Water (5 ml) was added and reaction was completed. The reaction mixture was filtered to obtain chlorine-disubstituted dinaphthothienothiophene (116) having weight average molecular weight of 409.35, with yield of 95.8%.