| abstract |
The present invention relates to cyanated compounds of the formula (I) wherein at least one of the radicals R 2 , R 3 , R 4 and R 5 is CN, and the remaining radicals are selected from hydrogen, chlorine and bromine; X is O, S, SO or SO 2 ; m is 0, 1, 2, 3 or 4; R 1 is selected from bromine, chlorine, cyano, -NR a R b , C 1 -C 24 -alkyl, C 1 -C 24 -haloalkyl, C 1 -C 24 -alkoxy, C 1 -C 24 -haloalkoxy, C 3 -C 24 -cycloalkyl, heterocycloalkyl, heteroaryl, C 6 -C 24 -aryl, C 6 -C 24 -aryloxy, C 6 -C 24 -aryl-C 1 -C 10 -alkylene, etc.; A is a diradical selected from diradicals of the general formulae (A.1), (A.2), (A.3), and (A.4) (A.1) (A.2) (A.3) (A.4) wherein R 6 , (R 7 ) n , (R 8 ) o and (R 9 ) p are as defined in the claims and in the description. The invention further relates to color converters comprising at least one polymer as a matrix material and at least one cyanated compound of formula (I) or mixtures thereof as a fluorescent dye, to the use of the color converters and to lighting devices comprising at least one LED and at least one color converter. |