| 摘要 |
Substituted tetrathiotetracenes and tetraselenotetracenes of the formula I <IMAGE> (I) in which Z is -S- or -Se- and (a) R1, R2, R3 and R4 are H and R5 to R8 are each H and at least one of the radicals R5 to R8 independently of one another is a substituent belonging to the group comprising C1-C20alkyl-X-p which is unsubstituted or substituted by halogen, -CN, -CONR9R10, -OR9, -SR9 or -COOR9, with the exception of C1-C4alkyl and methoxy, C2-C18alkenyl-X-p, C2-C18-alkynyl-X-p, C3-C8cycloalkyl-X-p, (C1-C12alkyl)-C3-C8cycloalkyl-X-p, C3-C8cycloalkyl-CrH2r-X-p, (C1-C12alkyl)-C3-C8-cyclo alkyl-CrH2r-X-p, phenyl-X-p, (C1-C12)alkyl)-phenyl-X-, phenyl-CrH 2r-X-p and (C1-C12alkyl)-phenyl-CrH2r-X-p, r is 1 or 2 and p is 0 or 1 and X is -O-, -S-, -SO- or -SO2-, or R5 to R8 independently are a substituent belonging to the group comprising -Br, -CF3, -CN, -Si(C1-C4alkyl)3, -S-(CmH2mO)-nR11 or -O-CmH2m-O-R11, or each one of R5 to R8 is -F or -Cl and at least one further member of R5 to R8 is a substituent of the groups defined above, including C1-C4alkyl and methoxy, R9 and R10 independently of one another are H, C1-C12alkyl, phenyl or -CmH2m-O-qR11, or R9 and R10 together are tetramethylene, pentamethylene, 3-oxapentylene or -CH2CH2NR9CH2CH2-, R11 is H or C1-C12-alkyl, m is a number from 2 to 4, n is a number from 2 to 20 and q is a number from 1 to 20, or b) R1 to R8 independently of one another are H or one of the substituents defined above, including C1-C4alkyl and methoxy, or -COOR9 or -CONR9R10 or two pairs of adjacent radicals of R1 to R8 are -CO-O-CO- or -CO-NR9-CO-, and at least one of R1 to R4 and also R5 to R8 is a substituent, with the exception of R2, R3, R6 and R7 when these are -F and methyl, and where R9 and R10 are as defined above. With electron acceptors they form charge-transfer complexes which can be used as organic electrical conductors, displays, optical switches and sensors.
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