| abstract |
Compositions for use in photogalvanic cells comprising as light-sensitive compounds heterocyclic compounds according to the general formula <IMAGE> wherein n, X, R<1>, R<2>, Y<1>, Y<2>, Y<3>, Z<1>, Z<2>, Z<3>, Z<4>, B and m having defined meanings. The compounds of this general formula (I) with the exception of 3,7-bis(4- methyl- 1 -piperazinyl)phenothiazonium bromide are claimed per se. |