Connection of the general formula I characterized by the fact that QO or S is preferred, QS is preferred; R1 is selected from the group consisting of alkoxy,
alkyl, fluorinated
alkyl, partially fluorinated
alkyl, and
aryl; X1 and X2 are independently N or C-R4; wherein R4 is selected from the group consisting of H,
halogen, alkoxy, branched or linear, cyclic or open-chain alkyl, alkenyl, and
aryl, wherein H may be substituted; A1 is a group with formula Ia, where * denotes the connection to the compound of the general formula I; Z1 is selected from the group consisting of O, S, Se, and N-R5. where R5 is selected from the group consisting of H, alkoxy, alkyl, fluorinated alkyl, partially fluorinated alkyl, and
aryl; Y1 N or C-R6, where R6 is selected from the group consisting of H,
halogen, alkoxy, branched or linear, cyclic or open-chain alkyl, alkenyl, and aryl, where H may be substituted in each case; Y2N or C-R7, where R7 is selected from the group consisting of H,
halogen, alkoxy, branched or linear, cyclic or open-chain alkyl, alkenyl, and aryl, wherein H may be substituted; and wherein R6 and R7 may be homocyclic or heterocyclic linked to each other in the form of a ring structure; R2 is selected from the group consisting of H, halogen, alkoxy, alkyl, fluorinated alkyl, partially fluorinated alkyl, branched or linear, cyclic or open-chain alkyl, amino, aryl, heteroaryl, alkenyl, and an
electron-withdrawing alkyl group with at least one C=C
double bond, where H may be substituted by CN or F; A2 is a group with the formula Ib, where * denotes the connection to the compound of the general formula I; Z2 is selected from the group consisting of O, S, Se, and N-R8, where R8 is selected from the group consisting of H, alkoxy, alkyl, fluorinated alkyl, partially fluorinated alkyl, and aryl; Y3N or C-R9, where R9 is selected from the group consisting of H, halogen, alkoxy, branched or linear, cyclic or open-chain alkyl, alkenyl, and aryl, where H may be substituted in each case; Y4N or C-R10, where R10 is selected from the group consisting of H, halogen, alkoxy, branched or linear, cyclic or open-chain alkyl, alkenyl, and aryl, wherein H may be substituted; and wherein R9 and R10 may be homocyclic or heterocyclic linked to each other in the form of a ring structure; and R3 is selected from the group consisting of H, halogen, alkoxy, alkyl, fluorinated alkyl, partially fluorinated alkyl, branched or linear, cyclic or open-chain alkyl, amino, aryl, heteroaryl, alkenyl, and an
electron-withdrawing alkyl group with at least one C=C
double bond, where H may be substituted by CN or F.