diphenylanthracene 1 6 7 12 tetraphenoxy n n u2032 bis 2 6 diisopropylphenyl 3 4 9 10 perylene dicarboximide 1 6 7 12 tetraphenoxy n n u2032 bis 2 5 di t butylphenyl 3 4 9 10 perylene dicarboximide 1 7 di chloro 6 12 diphenoxy n n u2032 bis 2 6 diisopropylphenyl 3 4 9 10 perylene dicarboximide 1 6 7 12 tetra p bromophenoxy n n u2032 bis 2 6 diisopropylphenyl 3 4 9 10 perylene dicarboximide 1 6 7 12 tetraphenoxy n n u2032 di neopentyl 3 4 9 10 perylene dicarboximide 1 6 7 12 tetra p t butylphenoxy n n u2032 dineopentyl 3 4 9 10 perylene dicarboximide 1 6 7 12 tetra o chlorophenoxy n n u2032 bis 2 6 diisopropylphenyl 3 4 9 10 perylene dicarboximide 1 6 7 12 tetra p chlorophenoxy n n u2032 bis 2 6 diisopropylphenyl 3 4 9 10 perylene dicarboximide 1 6 7 12 tetra o fluorophenoxy n n u2032 bis 2 6 diisopropylphenyl 3 4 9 10 perylene dicarboximide 1 6 7 12 tetra p fluorophenoxy n n u2032 bis 2 6 diisopropylphenyl 3 4 9 10 perylene dicarboximide 1 6 7 12 tetraphenoxy n n u2032 diethyl 3 4 9 10 perylene dicarboximide 1 7 dibromo 6 12 diphenoxy n n u2032 bis 2 isopropylphenyl 3 4 9 10 perylene dicarboximide 16 17 dihexyloxyviolanthrone rubrene and 1 4 dimethyl 9 10 bis phenylethynyl anthracene catalysts useful in the present invention include but are not limited to sodium salicylate sodium 5 fluorosalicylate sodium 5 chlorosalicylate sodium 5 bromosalicylate sodium trifluoroacetate potassium salicylate potassium pentachlorophenolate lithium salicylate lithium 3 chlorosalicylate lithium 5 chlorosalicylate lithium 3 5 dichlorosalicylate lithium 3 5 6 trichlorosalicylate lithium.