Quenching of emission and of photochemistry for aqueous Rh(NH3)5Cl2+

Excited state processes for aqueous Rh(NH3)5Cl2+ and Rh(NH3)5Br2+

“…Thus we reported in a preliminary communication that the emission from Rhi(NH 3 ) 5 C1 2 + was quenched by OH ion, with concommittant 87% quenching of the photochemistry [11]. The present paper adds detail and extends the investigation to the very interesting case of aqueous Rh(NH 3 ) 5 Br…”

The photosubstitution reactions of rhodium(III) ammine complexes: A case study

“…Later it was shown in our laboratory using ns pulse laser techniques that the LF triplet state lifetimes of these same ions in fluid aqueous solution could be directly correlated to the quantum yields of product formation (4) and, in another laboratory, that quenching of the triplet state by Br^nsted bases led to the quenching of most photosubstitutions (5). Conclusions about excited state behavior similar to that shown in Figure 2 have been used to interpret the LF photoreactions of iridium(III) ammine complexes such as Ir(NH3)f+ and the polycyano complexes of cobalt(III), e.g., Co(CN)e~.…”