Abstract
The series of nitrosyl complexes trans-[Ru(NH 3) 4L(NO)]Cl 3, 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 330–440 nm. Quantum yields for [Ru(NH 3) 4L(H 2O)] 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(NH 3) 4L(NO +)] 3+ is the trans-[Ru III(NH 3) 4L(Cl)] 2+ and NO as suggested by UV–Vis, electrochemical, and FTIR techniques.
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