TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Claimed): The preparation of (I) comprises reacting substituted (E)-3-((5Z,9Z,15Z,19Z)-15-((diphenylamino)-ethynyl)-10,20-diphenyl-21, 22,23,24-tetrahydro-porphin-5-yl)-propenal-zinc complex of formula (III) with carboxylic acid compounds of formula (X-CH2-COOH) (XIII) to obtain compounds of formula (II), i.e. representative of (I). Preferred Method: (III) is prepared by reacting bromine substituted (E)-3-((1Z,4Z,9Z,15E)-15-bromo-10,20-diphenyl-porphyrin-5-yl)-propenal-zinc complex of formula (IV) with substituted N-ethynyl-N-phenylaniline compounds of formula (XII) in presence of bis(triphenylphosphine)palladium(II) dichloride as palladium catalyst and copper iodide. (IV) is prepared by reacting substituted (E)-3-((1Z,4Z,9Z,15Z)-10,20-diphenyl-porphyrin-5-yl)-propenal-zinc complex of formula (V) with N-bromosuccinimide. (V) is prepared by reacting substituted (E)-3-((1Z,4Z,9Z,15Z)-10,20-diphenyl-porphyrin-5-yl)-propenal compounds of formula (VI) with zinc acetate. (VI) is prepared by reacting substituted (E)-3-((1Z,4Z,9Z,15Z)-10,20-diphenyl-porphyrin-5-yl)-propenal-nickel complex of formula (VII) with chloroform and sulfuric acid. (VII) is prepared by reacting 3-dimethylamino acrolein and phosphoryl chloride with substituted (5Z,10Z,14Z,19Z)-5,15-diphenyl-porphyrin compounds of formula (VIII). (VIII) is prepared by reacting (5Z,10Z,14Z,19Z)-5,15-diphenyl-porphyrin compound of formula (IX) with nickel acetate. (IX) is prepared by mixing 2-(1H-pyrrol-2-ylmethyl)-1H-pyrrole (X) with benzaldehyde compounds of formula (XI), purging with argon gas, then adding trifluoroacetic acid and chloranil and performing reaction. (X) is prepared by reacting pyrrole and p-formaldehyde in presence of indium chloride under an argon gas in sodium hydroxide. Preferred Components: (I) have: band gap of 1.50-2.50 eV; open-circuit voltage of 500-900 mV; short circuit current density of 10-20 mA/cm2; fill factor (FF) of 65-80%; and conversion efficiency ( eta ) of 6-15%. The dye-sensitized solar cells including (I), where the computer protocol equation as given in the specification. SPECIFIC COMPOUNDS - 1 COMPOUNDS (I) is specifically claimed, which is (2E,4E)-2-cyano-5-((5Z,9Z,15Z,19Z)-15-((di-p-tolyl-amino)-ethynyl)-10,20-diphenyl-21,22,23,24-tetrahydro-porphin-5-yl)-penta-2,4-dienoic acid-zinc complex (Ia).    EXAMPLE - 88 mg (E)-3-((5Z,9Z,15Z,19Z)-15-((Di-p-tolyl-amino)-ethynyl)-10,20-diphenyl-21,22,23,24-tetrahydro-porphin-5-yl)-propenal-zinc complex of formula (XX) and 73 mg cyanoacetic acid were dissolved in acetonitrile, then 0.7 mlpiperidine was added, and then refluxed for 4 hour under stirring condition to obtain reaction. Then pH value of the obtained reaction was adjusted to 2 using 2M phosphoric acid, extracted three times with dichloromethane and water, dried over magnesium sulfate, concentrated and separated by column using dichloromethane and methanol at volume ratio of 10:1as eluent to obtain 665 mg (2E,4E)-2-cyano-5-((5Z,9Z,15Z,19Z)-15-((di-p-tolyl-amino)-ethynyl)-10,20-diphenyl-21,22,23,24-tetrahydro-porphin-5-yl)-penta-2,4-dienoic acid-zinc complex with 69% yield.