Monolayer or multilayer systems containing compounds of the formula I ##STR1## in which X is S or Se, R.sup.1 is C.sub.1 -C.sub.30 alkyl, --CF.sub.3, --O--R.sup.3, --S--R.sup.3 or --CO--O--R.sup.3, R.sup.2 is hydrogen, C.sub.1 -C.sub.30 alkyl, --CF.sub.3, --O--R.sup.3, --S--R.sup.3 or --CO--O--R.sup.3, and R.sup.3 is C.sub.1 -C.sub.30 alkyl or partially or perfluorinated C.sub.1 -C.sub.30 alkyl, are described. Electrically conductive layers which are suitable, for example, for the production of electrically conductive coatings can be prepared from the layer systems by doping with electron acceptors.
含有化合物I的单层或多层系统描述如下:##STR1## 其中X为S或Se,R1为C1-C30烷基,--
CF3,--O--R3,--S--R3或--CO--O--R3,R2为氢,C1-C30烷基,-- ,--O--R3,--S--R3或--CO--O--R3,R3为C1-C30烷基或部分或
全氟化的C1-C30烷基。通过使用电子受体进行掺杂,可以从这些层系统制备适用于制备导电涂层的导电层。