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- W2053706906 abstract "The promoting effect of birnessite (δ-MnO2) in the abiotic generation of CO2 through its ability to cleave the ring structure of pyrogallol (1,2,3-trihydroxybenzene) under ambient temperature and pressure was studied in a system free of microbial activity. At the end of a 90-h reaction period, the release of CO2 in the birnessite—pyrogallol system was 18.9 times higher than that in the pyrogallol system, indicating the promoting effect of birnessite in the ring cleavage of pyrogallol. The IR and solid state CPMAS 13C-NMR spectroscopic data reveal that the pyrogallol-derived polymers, which are formed by the promoting effect of Mn(IV) oxide, have a very significant degree of structural aliphaticity, contain a substantial amount of carboxyl groups, and resemble natural humic substances. The data indicate that the ring cleavage of pyrogallol and the subsequent formation of carboxyl groups and aliphatic fragments via the abiotic process in soils and the associated environments merit attention. Furthermore, the data indicate that ring cleavage of polyphenols as promoted by Mn(IV) oxides can be a pathway of C turnover and a mechanism contributing to the aliphatic nature of humic substances in the environment." @default.
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- W2053706906 date "1992-03-01" @default.
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- W2053706906 title "Significance of Mn(IV) oxide in the abiotic ring cleavage of pyrogallol in natural environments" @default.
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- W2053706906 doi "https://doi.org/10.1016/0048-9697(92)90022-k" @default.
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