Photoinduced NO release by visible light irradiation from pyrazine-bridged nitrosyl ruthenium complexes |
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| Authors: | Sauaia Marilia G de Lima Renata G Tedesco Antonio C da Silva Roberto S |
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| Institution: | Departamento de Química da Faculdade de Filosofia Ciências e Letras de Ribeir?o Preto, Universidade de S?o Paulo, Av. dos Bandeirantes 3900, 14040-901 Ribeir?o Preto, SP, Brazil. |
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| Abstract: | The binuclear complex RuII(NH3)5(pz)RuII(bpy)2(NO)](PF6)5 was prepared and characterized by elemental analysis, UV-vis, and IR spectroscopy. The complex UV-vis spectrum has presented bands at 242, 286, and 530 nm in acetate buffer solution at pH 4.5. The photochemical study by laser flash-photolysis at 532 nm showed the NO release account from the NO measured by a NO sensor. The quantum yield for NO release (0.025 +/- 0.004 mol einsten-1) was determined with a laser flash-photolysis apparatus (Continuum Q-switched Nd:YAG laser). The major irradiation product of the RuII(NH3)5(pz)RuII(bpy)2(NO)]5+ complex besides nitric oxide is RuIII(NH3)5(pz)RuII(bpy)2(H2O)]5+. |
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