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0.851 g of ruthenium (III) chloride hydrate and 40 ml ofN-methylpyrrolidone were added to the first reactor and (4,4'-dinonyl-2,2'bipyridine)was added thereto while stirring and the mixture was stirred for 0.5 hour. In the second reactor, ligand 2(2,2'-bipyridine-4,4'-dicarboxylicacid) and 60 ml of N-methylpyrrolidone were placed and maintained at 140 to 150 C. The mixed solution of the first reactor was added to the secondreactor, stirring was continued for 1.5 hours while maintaining the temperatureat 140 to 150 C, and ammonium thiocyanate 5.16 g was added and stirred for 1hour and then the reactor was cooled. The reaction mixture was poured into distilled water toprecipitate a solid. The solid was dissolved in 40 ml of methanol and NaOH wereused to maintain the pH of 10 to 11. After purification by column usingSephadex resin, the solution was adjusted to pH 4.8 with nitric acid to give togive the desired compound as a solid.
General procedure: 0.851 g of ruthenium (III) chloride hydrate and 40 ml of N-methylpyrrolidone were added to the first reactor(4,4'-dinonyl-2,2'bipyridine) was added thereto while stirring and the mixture was stirred for 0.5 hour. In the second reactor, ligand 2(2,2'-bipyridine-4,4'-dicarboxylic acid) and 60 ml of N-methylpyrrolidone were placed and maintained at 140 to 150 C. The mixed solution of the first reactor was added to the second reactor,Stirring was continued for 1.5 hours while maintaining the temperature at 140 to 150 C, and ammonium thiocyanate5.16 g was added and stirred for 1 hour and then the reactor was cooled. The reaction mixture was poured into distilled water to precipitate a solid. The solid was dissolved in methanol40 ml and NaOH were used to maintain the pH of 10 to 11, After purification by column using Sephadex resin,the solution was adjusted to pH 4.8 with nitric acid to give a solid to give the desired compound. Instead of ruthenium (III) chloride hydrate, [RuCl2 (p-cymene)] 2 Except that the complex compound was used, a heteroleptic ruthenium complex dye was synthesized in the same manner.
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