Photochemical NO release from nitrosyl RuII complexes with C-bound imidazoles

Authors :: Holanda, Alda K.M.
da Silva, Francisco O.N.
Sousa, Jackson R.
Diógenes, Izaura C.N.
Carvalho, Idalina M.M.
Moreira, Ícaro S.
Clarke, Michael J.
Lopes, Luiz G.F.
Source :: Inorganica Chimica Acta. Jun2008, Vol. 361 Issue 9/10, p2929-2933. 5p.
Publication Year :: 2008
Abstract: Abstract: The series of nitrosyl complexes trans-[Ru(NH3)4L(NO)]Cl3, L=caffeine, theophylline, imidazole and benzoimidazole in position trans to NO were prepared and their photochemical properties studied. All complexes showed nitric oxide (NO) release under light irradiation at 330–440nm. Quantum yields for [Ru(NH3)4L(H2O)]3+ formation (ϕ Ru(III)) were sensitive to the natures of L, λ irr and pH. The major product of the irradiation of trans-[Ru(NH3)4L(NO+)]3+ is the trans-[RuIII(NH3)4L(Cl)]2+ and NO as suggested by UV–Vis, electrochemical, and FTIR techniques. [Copyright &y& Elsevier]