Oxydoréduction photochimique et thermique entre le chrome(VI) et un acide α aminé (glycine, alanine, hydroxy proline et méthionine)
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Photochemical and thermal oxidation that occurs between chromium(VI) and various amino acids leads quantitatively to chromium(III). Spectroscopic studies rule out the formation of a chromium(VI) – amino acid complex in the ground state. Thermal oxidoreduction involves HCrO4−, the protonated amino acid [Formula: see text] and H+ ions. Chromium(V) appears to be an intermediate species in the reaction. HCrO4− is the only absorbing compound and the photochemical chromium(VI) reduction proceeds through a reaction between [HCrO4−]* and the amino acid. Chromium(V) is the primary product of the charge transfer reaction. Reduction quantum yields are proportional to the amino acid concentration and pH independent in the HCrO4− existence range.
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1988 ◽
Vol 12
(6)
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pp. 592-596
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2006 ◽
Vol 117
(2)
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pp. S40
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2019 ◽
Vol 12
(02)
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pp. 47-50
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