TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Claimed): The carboxyazulenocyanine compound is prepared by reacting o-dicyanoazulene of formula (VII) with a phthalonitrile of formula (VIII) in presence of a zinc salt. SPECIFIC COMPOUNDS - 08 Carboxyazulenocyanine compounds are specifically claimed, e.g. 1,3,9,11,19,21-hexa-tert.-butyl-27-carboxyethynyl-triazulene(6,5-a: 5',6'-f: 6'',5''-k)benzo(2''',3'''-p)porphyrazine zinc (II), 1,3,10,12,18,20-hexa-tert.-butyl-27-carboxyethynyl-triazulene(6,5-a: 6',5'-f: 5'',6''-k)benzo(2''',3'''-p)porphyrazine zinc (II), 1,3,10,12,19,21-hexa-tert.-butyl-27-carboxyethynyl-triazulene(6,5-a: 5',6'-f: 6'',5''-k)benzo(2''',3'''-p)porphyrazine zinc (II), 1,3,9,11,19,21-hexa-tert.-butyl-28-carboxyethynyl-triazulene(6,5-a: 6',5'-f: 6'',5''-k)benzo(2''',3'''-p)porphyrazine zinc (II) or 1,3,9,11,18, 20-hexa-tert.-butyl-27-carboxyethynyl-triazulene(6,5-a: 5',6'-f: 5'',6''-k)benzo(2''',3'''-p)porphyrazine zinc (II) of formula (IX)..    EXAMPLE - The example illustrates the synthesis of 1,3,9(10,11),11 (12,13),18 (19,20),20 (21,22)-hexa-tertiary-butyl-27(28,29)-carboxyethynyl-triazulene(6,5(5,6)-a: 5',6'(6',5')f: 5'',6''(6'',5'')k)benzo(2'''3'''p)-porphyrazinate zinc (II) (mixture of regioisomers). A mixture of 1,3-di-tert.-butyl-5,6-dicyanoazulene (120 mg, 0.41 mmol), 4-iodophthalonitrile (26.2 mg, 0.10 mmol) and zinc acetate (30 mg, 0.16 mmol) was refluxed in dimethylethanolamine (6 ml) for 24 hours with stirring in argon atmosphere. The reaction mixture was cooled at room temperature and then the solvent was removed to form crude product. The crude product was purified by column chromatography on silica gel to receive 20 mg (16%) of 1,3,9(10,11),11(12,13),18 (19,20),20 (21,22)-hexa-tert.-butyl-27(28,29)-iodotriazulene(6,5(5,6)-a: 5',6'-(6',5')f: 5'',6''(6'',5'')k) benzo (2''',3'''p)-porphyrazinate zinc (II) as a dark green solid. A freshly distilled and degassed solution of tetrahydrofuran or triethylamine (8 ml) containing 20 mg (16mol) of 1,3,9(10,11),11(12,13),18 (19,20),20 (21,22)-hexa-tert.-butyl-27(28,29)-iodotriazulene(6,5(5,6)-a: 5',6'-(6',5')f: 5'',6''(6'',5'')k) benzo (2''',3'''p)-porphyrazinate zinc (II) was added to propargyl acid (2.80 mu l, 45.2 mu mol), copper (I) iodide (0.2 mg, 1 mu mol) and bis(triphenylphosphine)palladium (II) dichloride (1 mg, 1.4 mu mol). The reaction mixture was stirred at room temperature under argon atmosphere for two hours. The solution was washed with brine and then dried over magnesium sulfate to form a black solid. The formed black solid was purified by short column chromatography by using silica gel and a mixture of dichloromethane and methanol (10:1) to give 11 mg (60%) of the desired compound as a black solid.