NOVELTY - A compound contains greater than or equal to 1 divalent units.    USE - A compound for charge transport, semiconducting, electrically conducting, photoconducting, or light emitting material in optical, electrooptical, electronic, electroluminescent, or photoluminescent devices e.g. organic field effect transistors (OFETs), thin film transistors (TFTs), organic LEDs, organic light emitting transistors (OLETs), organic photovoltaic (OPV) devices, and organic photodetectors (OPDs), organic solar cells, laser diodes, Schottky diodes, photoconductors, and photodetectors, in component of device e.g. charge injection layers, charge transport layers, interlayers, planarizing layers, antistatic films, polymer electrolyte membranes (PEMs), conducting substrates, conducting patterns, or in assembly of devices e.g. integrated circuits (ICs), radio frequency identification (RFID) tags, security markings, security devices, flat panel displays or their backlight, electrophotographic (recording) devices, organic memory devices, sensor devices, biosensors, and biochips (all claimed).    ADVANTAGE - Organic semiconducting materials are easy to synthesize and show good processability, high stability, good solubility in organic solvents, high charge carrier mobility, and low band gap.    DETAILED DESCRIPTION - A compound of formula (I) contains greater than or equal to 1 divalent units.    X 1-X 4=O, S, Se, or Te;    T 1, T 2=O, CG1G2 or NG1;    G 1, G 2=electron withdrawing group;    R 1, R 2=H, 1-30C (cyclic) alkyl optionally substituted by O, S, -NR 0-, -SiR 0R 00-, -CY 1=CY 2-, or -CC- provided that O and/or S are not linked directly to one another and greater than or equal to 1 H are optionally substituted by F, Cl, Br, I, or CN, or 4-20C optionally substituted aryl, heteroaryl, aryloxy, or heteroaryloxy;    Y 1, Y 2=H, F, Cl, or CN;    R 0, R 00=H or 1-12C alkyl;    U=formula (I);    Ar 1-Ar 3=5-30C aryl or heteroaryl other than formula (I) optionally substituted by RS;    RS, R 7, R 8=F, Br, Cl, CN, NC, NCO, NCS, OCN, SCN, C(O)NR 0R 00, C(O)X 0, C(O)R 0, NH 2, NR 0R 00, SH, SR 0, SO 3H, SO 2R 0, OH, NO 2, CF 3, SF 5, optionally substituted silyl, 1-40C carbyl or hydrocarbyl optionally substituted by hetero atoms, or P'-Sp-;    P'=polymerizable or crosslinkable group; and    Sp=spacer group or single bond.    INDEPENDENT CLAIMS are included for:    (1) mixture or polymer blend containing greater than or equal to 1 compounds or polymers and greater than or equal to 1 compounds or polymers having semiconducting, charge transport, hole/electron transport, hole/electron blocking, electrically conducting, photoconducting, or light emitting properties;    (2) formulation containing greater than or equal to 1 polymers, mixtures, or polymer blends and greater than or equal to 1 solvents, preferably organic solvents;    (3) monomer of formula R 5-Ar 1-U-Ar 2-R 6(VI); and    (4) preparation of polymer which involves coupling greater than or equal to 1 monomer of formula (VI) with each other and/or with monomer of formula R 5Ar 3R 6(C1) and/or formula R 5DR 6(C2) in an aryl-aryl coupling reaction.