Reactivity of the carbonate radical toward aromatic compounds in aqueous solution

Abstract

40) For convenience, the units for k values and for concentrations will be given In the text as cm3 sec-1 and cm-3 rather than cm3 molecule-1 sec-1 and molecule cm-3, respectively.

The Carbonate Radical (HCO3·/CO3-·) as a Reactive Intermediate in Water Chemistry: Kinetics and Modelling

“…However, there is one former investigation which is performed at room temperature. Chen et al [24] have found a rate constant of 3 · 10 3 M -1 s -1 in a flash photolysis investigation. The significantly lower rate coefficient found in this investigation may again be explained by the different reaction conditions used in the experiments as discussed before.…”

“…There is one former investigation of this reaction which is performed at room temperature. Chen et al [24] have found a second order rate constant of k 6, 298K = 4.3 · 10 4 M -1 s -1 applying a flash photolysis apparatus to generate the carbonate radical anion. This value is not very different to our observed rate constant.…”

Photocatalytic degradation of aniline at the interface of TiO2 suspensions containing carbonate ions

“…(8)) reacts in a similar fashion to that of CO • − 3 . Unlike • OH, O • − does not add to the aromatic ring at an appreciable rate and is considered as an efficient hydrogen atom abstracting radical [37]. Although the exact mode of reaction of CO • − 3 with aromatics is not known, but CO • − 3 has been shown earlier to transfer electron to certain aliphatic radicals through formation of an intermediate complex [34] as shown above in reaction (19).…”

Oxidation of Guanine by Carbonate Radicals Derived from Photolysis of Carbonatotetramminecobalt(III) Complexes and the pH Dependence of Intrastrand DNA Cross‐Links Mediated by Guanine Radical Reactions

“…[17] As a source of carbonate radical anions, we selected carbonatotetrammineCo(III) complexes that upon photolysis readily yield CO 3 •− radicals. [18–26] The latter radicals generated by this method have been successfully used in studies of oxidation reactions of diverse organic molecules that include amino acids [21–23] and short peptides. [26] Recently, the oxidation of guanine by CO 3 •− radicals derived from the photolysis of [Co(NH 3 ) 4 CO 3 ] + complexes has been monitored by ultrafast infrared laser spectroscopy.…”