LIGHT COLLECTOR SYSTEMS AND THE USE OF ANTHRAPYRIMIDINE DERIVATIVES AS ENERGY CONVERTERS IN SUCH SYSTEMS

摘要

1. Light-collecting system, characterised in that it contains an anthrapyrimidine derivative of the formula see diagramm : EP0032373,P5,F3 in which R1 denotes hydrogen, alkyl, cycloalkyl, aryl, aralkyl, -NHR5 or -OR6 , wherein R5 and R6 represent hydrogen, alkyl, cycloalkyl, aryl or aralkyl and the hydrocarbon radicals mentioned for R1 , R5 and R6 can be substituted ; R2 and R3 designate hydrogen, cyano or -OR7 , wherein R7 represents alkyl, cycloalkyl, aryl or aralkyl, it being possible for the hydrocarbon radicals R7 to be substituted, and R4 designates hydrogen, alkyl, cycloalkyl, aralkyl or aryl, it being possible for the hydrocarbon radicals R4 to be substituted.