Conjugated thiophene compound, conprising perfluorinated and alkylated sidechains, conductive organic thin film containing the compound, and field-effect type organic transistor employing the thin film

A π-conjugated compound represented by any of General Formulas (III) to (VII) below;

• where R1 and R2 are respectively hydrogen or a linear, cyclic, or branched alkyl group of 1 to 20 carbon atoms, at least one of R1 and R2 being not hydrogen, and one or more of CH2 of the alkyl group may be replaced by O, CO, S, or NH;
• R3 and R4 are respectively hydrogen or a linear, cyclic, or branched perfluoroalkyl group of 1 to 20 carbon atoms, at least one of R3 and R4 being not hydrogen, and one or more of CF2 of the perfluoroalkyl group may be replaced by CH2, Of CO, S, or NH;
• Al, A2, A3, and A4 represent respectively a linkage selected independently from the group consisting of a single bond, an alkylene group of 1 to 10 carbon atoms, a —(CH═CH)r— group, and bivalent ring groups of thiophene, furan, benzene, anthracene, and pentacene;
• one or more of CH groups in the ring may be replaced by N, or may have a substituent;
• r is an integer of 1 to 10;
• X, Z, and L are respectively an integer of 0 to 20 provided that the sum X+Z+L is an odd number;
• Y is an even number of not more than 20;
• P is an odd number not more than 19;
• and m is an integer of 2 or more.

A π-conjugated compound represented by any of General Formulas (IIIa) to (VIIa) below;

• where R1 and R2 are respectively hydrogen or a linear, cyclic, or branched alkyl group of 1 to 20 carbon atoms, at least one of R1 and R2 being not hydrogen, and one or more of CH2 of the alkyl group may be replaced by O, CO, S, or NH;
• R3 and R4 are respectively hydrogen or a linear, cyclic, or branched perfluoroalkyl group of 1 to 20 carbon atoms, at least one of R1 and R2 being not hydrogen, and one or more of CF2 of the perfluoroalkyl group may be replaced by CH2, O, CO, S, or NH;
• X, Z, and L are respectively an integer of 0 to 20 provided that the sum X+Z+L is an odd number;
• Y is an even number of not more than 20;
• P is an odd number not more than 19;
• and m is an integer of 2 or more.