UV photolytic degradation of phenylmercury compounds in water-acetonitrile (1:1) media

Excited state properties of diphenylmercury: photolysis and luminescence under ambient conditions

“…Solutions of HgPh 2 are not luminescent. However, in accordance with previous observations [9][10][11] these solutions are light sensitive. The photolysis of HgPh 2 in CH 3 CN is accompanied by spectral changes (Fig.…”

“…It is commercially available in high purity (Strem), thermally very stable and structurally well characterized [8]. Diphenylmercury has Hg been shown to undergo a light-induced splitting of the HgPh bond [9][10][11]. Moreover, some preliminary reports on the photoluminescence of HgPh 2 in low-temperature glasses have appeared many years ago [12,13] but the further significance of this emission has apparently not been evaluated.…”

Transition Metal Modified TiO2-Loaded MCM-41 Catalysts for Visible- and UV-Light Driven Photodegradation of Aqueous Organic Pollutants

“…Photocatalytic treatment of polluted water and gas has gained increased attention recently. , It involves the utilization of ultraviolet or solar light by a semiconductor photocatalyst. This technique has been proven successful for the abatement of several different classes of pollutants and even inorganic ions. , However, the problem of low energy efficiency of the photocatalytic process has hindered its practical application.…”

Electrode reactions and electroanalysis of organomercury compounds

“…222 Particularly, this approach can be exemplified by photoemission methods 156, 198, 222 ± 234 where the slow heterogeneous electron transfer step was displaced by the quick homogeneous capture of the solvated (e À s )/hydrated (e À eq ) electron by an acceptor (RH or RHal). If the rate constant (k a ) for the solvated electron capture by the acceptor [step (a) in reaction (32)] was insufficiently high, then in place of e À s , the photoemitted radicals OH . (in aqueous solutions) or H .…”

“…formed. For example, for R = b-cyanoethyl, 231 Me, 227 Pr i , 232 and Hal = Cl, Br, and especially I, 231 the chemical reaction between the radical and the mercury electrode could precede step (c) in Eqn (32). The probability of such reactions in the photoemissive transformations of intermediates (acceptors RHal were the anions of polyfluorobenzoic acids C 6 F n H 57n COO 7 , n = 0 ± 5) cannot be ruled out.…”