AbstractA series of phthalocyanines (Pcs) substituted by phenoxy groups were synthesized through the route whose intermediates are selected to be phthalonitriles with different structures. These phthalocyanines and their intermediates are characterized by elemental analysis, IR and MS. The thermogravimetric loss and the aggregation behavior data of phthalocyanines are determined with the purpose to better understand the possible recording mechanism and to improve the dye's practical applications in the optoelectronic field.