TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (claimed): Preparation of the compound (I) involves reacting a substituted tri-tert-butylphthalocyanine of formula (II), where the tert-butyl groups located in the three isoindole rings are located indiscriminately in any of the four positions of the corresponding benzene ring, and the R1 group is located indiscriminately in any of the four positions of the corresponding benzene ring, with an adequate oxidizing reagent.R1=functional group or carbon-containing substituent which is converted into carboxylic group (preferably hydroxyalkyl, alkylcarbonyl, aldehyde, alkenyl or alkynyl).Preferred Process: The oxidation of the compound (II) (where R1 is aldehyde), is performed with sodium chlorite/sulfamic acid. The oxidation of (II) (where R1 is hydroxymethyl or methylcarbonyl), is performed with potassium permanganate. The oxidation of (II) (where R1 is vinyl or ethynyl), is performed with ozone in non-reductive conditions. Preferred Compound: The carboxyl group located in the isoindole ring is located in any of positions 1 or 2 of the benzene ring. The tert-butyl groups located in the three isoindole rings are located indiscriminately in any of the two central positions of each one of the corresponding benzene rings of the isoindole rings of compound (I).    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The dye or organic material, electronically active or not, is an organic conducting polymer, oligomer or copolymer. The organic conducting polymer, oligomer or copolymer, is a polyphenylenevinylene (PPV) or a polytiophene. SPECIFIC COMPOUNDS - 8 Compounds are specifically claimed as the compound (I) e.g. 9, 16, 23-tri-tert-butyl-2-carboxy-5,28:14,19-diimino-7,12:21,26-dinitrilo-tetrabenzo(c, h, m, r)(1, 6, 11, 16)tetraazacycloeicosinato-(2-)-N29, N30, N31, N32 zinc(II) (I'); 9, 16, 24-tri-tert-butyl-2-carboxy-5,28:14,19-diimino-7,12:21,26-dinitrilo-tetrabenzo(c, h, m, r)(1, 6, 11, 16)tetraazacycloeicosinato-(2-)-N29, N30, N31, N32 zinc(II); 9, 17, 23-tri-tert-butyl-2-carboxy-5,28:14,19-diimino-7,12:21,26-dinitrilo-tetrabenzo(c, h, m, r)(1, 6, 11, 16)tetraazacycloeicosinato-(2-)-N29, N30, N31, N32 zinc(II); 10, 17, 23-tri-tert-butyl-2-carboxy-5,28:14,19-diimino-7,12:21,26-dinitrilo-tetrabenzo(c, h, m, r)(1, 6, 11, 16)tetraazacycloeicosinato-(2-)-N29, N30, N31, N32 zinc(II); and 10, 17, 24-tri-tert-butyl-2-carboxy-5,28:14,19-diimino-7,12:21,26-dinitrilo-tetrabenzo(c, h, m, r)(1, 6, 11, 16)tetraazacycloeicosinato-(2-)-N29, N30, N31, N32 zinc(II);    EXAMPLE - To a vigorously stirred solution of 9(10), 16(17), 23(24)-tri-tert-butyl-2-formyl-5,28:14,19-diimino-7,12:21,26-dinitrilotetrabenzo(c, h, m, r)(1,6,11,16)tetraazacycloeicosinato-(2-)-N29, N30, N31, N32 zinc(II) (statistical mixture of regioisomers) (130 mg) in acetone (96 ml), cooled at O degrees C, NaClO2 (47 mg) was added in a few portions. Then, a solution of sulfamic acid (51 mg) in deionized water (12 ml) was added at once. The ice bath was removed and the reaction was allowed to proceed at room temperature for 4 hours. After the starting compound disappeared, the solution was poured into aqueous hydrochloric acid 0.1 M (400 ml) and a blue-greenish solid precipitated. After work-up 9(10), 16(17), 23(24)-tri-tert-butyl-2-carboxy-5,28:14,19-diimino-7,12:21,26-dinitrilo-tetrabenzo(c, h, m, r)(1,6, 11, 16)tetraazacycloeicosinato-(2-)-N29, N30, N31, N32 zinc(II) (103 mg, 78%) was obtained.