TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Claimed): Preparation (P1) of the compound (A1) involves heating a quantity of precursor porphyrins to a fusion temperature in an inert gas environment, where the fusion temperature is associated with the precursor porphyrins; holding the precursor porphyrins at the fusion temperature for a predefined period, of time until the precursor porphyrins melt and form a mixture of fused porphyrins; cooling the mixture of fused porphyrins to room temperature; and separating the mixture of fused porphyrins into various fused porphyrin compounds. The fusion temperature is above melting point of the precursor porphyrins; and separating the mixture of fused porphyrins comprises column chromatography. The process further involves purification of the separated fused porphyrin compounds through recrystallization of the separated fused porphyrin compounds. Preferred Compounds: In the compounds, the porphyrin and at least one of the polycyclic aromatic rings are doubly connected in (meso, beta ) mode; and the porphyrin and at least one of the polycyclic aromatic rings are triply connected in ( beta ,meso, beta ) mode. The non-activated polycyclic aromatic rings are selected from 21 rings, as given in the specification, e.g. ring of formula (ia). The non-activated heterocyclic rings are selected from 12 rings, as given in the specification, e.g. ring of formula (iia).R=substituent.In the ring (ia), the wave-line represents the fusion position of the polycyclic aromatic rings to the porphyrin; and the asterisk represents the point where the polycyclic aromatic rings are connected to the meso position of the porphyrin. In the ring (iia), the wave-line represents the fusion position of the heterocyclic rings to the porphyrin, and the asterisk represents the point where the heterocyclic rings are connected to the meso position of the porphyrin. Preferred Components: The donor material is an organic compound selected from the compounds (A1). SPECIFIC COMPOUNDS - 8 Compounds are disclosed as the compound (A1), e.g. (10,20-bis(3,5-di-tert-butylphenyl)-3,5-bis(2,3-benzothienyl)-15-(3-benzothienyl)porphyrinato(2-)-kappaN 21,kappaN 22,kappaN 23,kappaN 24)zinc(II) (I'); 4,5,9,10,14,15,19,20-tetrakis-(1,10-pyrenyl)porphyrinato(2-)-kappa- N 21,kappaN 22,kappaN 23,kappaN 24)zinc(II); (10,20-bis(3,5-di-tert-butylphenyl)-5,15-bis(1-pyrenyl)porphyrinato(2-)-kappaN 21,kappaN 22,kappaN 23,kappaN 24)zinc(II); (10,20-bis(3,5-di-tert-butylphenyl)-4,5-(1,10-pyrenyl)-15-(1-pyrenyl)porp- hyrinato(2-)-kappaN 21,kappaN 22,kappaN 23,kappaN 24)zinc(II); and (meso-(15,15'-bis(4-cyanophenyl)-10,10',20,20'-tetrakis(3,5-di-tert-butylphenyl)-5,5'-biporphyrinato(4-)-kappaN 21,kappaN 22,kappaN 23,kappaN 24,kappaN 21',kappaN 22',kappaN 23',kappaN 24'))dizinc(II).    EXAMPLE - A mixture of (10,20-bis(3,5-di-tert-butylphenyl)-5,15-bis-bromo-porphyrinato(2-)-kapp-N21, kappaN22,kappaN23,kappaN24)zinc(II) (3.4 g), cesium carbonate (10 g), tetrakis(triphenylphosphine)palladium (Pd(PPh3)4) (440 mg) water (3 ml) and 3-benzothienylboronic acid (1.67 g) in toluene (600 ml) and pyridine (6 ml) was degassed, and reflux in nitrogen atmosphere for 12 hours. After work up, (10,20-bis(3,5-di-tert-butylphenyl)-5,15-bis(3-benzothienyl)porphyrinato(-2-)-kappaN21,kappaN22,kappaN23,kappaN24)zinc(II) (ZnBTP) (3.03 g) was obtained. The porphyrin ZnBTP (870 mg) and anhydrous iron(III) chloride (2.5 g) were stirred in anhydrous dichloromethane (500 ml) under nitrogen atmosphere at 20 degrees C (water bath) for 2 hours. After work up, (10,20-bis(3,5-di-tert-butylphenyl)-3,5-bis(2,3-benzothienyl)-15-(3-benzothienyl)porphyrinato(2-)-kappaN21,kappaN22,kappaN23,kappaN24)zinc(II) (ZnFBTP) (490 mg; yield: 56%) was obtained.