Polymer-supported periodate and iodate as oxidizing agents

Model polymer system for investigating the generation of hydrogen peroxide and its biological responses during the crosslinking of mussel adhesive moiety

“…When catechol (i.e., dopamine and α,β-dehydrodopamine) was oxidized to its corresponding quinone (dopamine quinone and α,β-dehydrodopamine quinone, respectively) (reactions A and C, respectively), new oxidant species are generated during the process. During the fast oxidation process involving IO 4 − , IO 4 − was reduced to iodate (IO 3 − ) [48, 49] while molecular dioxygen (O 2 ) was transformed into highly reactive O 2 •− (reaction F) [50]. IO 3 − can further oxidize catechol to form quinone [49].…”

“…During the fast oxidation process involving IO 4 − , IO 4 − was reduced to iodate (IO 3 − ) [48, 49] while molecular dioxygen (O 2 ) was transformed into highly reactive O 2 •− (reaction F) [50]. IO 3 − can further oxidize catechol to form quinone [49]. At the same time, IO 3 − is reduced to a highly reactive intermediate product, iodite (IO 2 − ), which is rapidly reduced to the final product iodine (I 2 ) in the presence of phenolic compound [49, 51].…”

“…IO 3 − can further oxidize catechol to form quinone [49]. At the same time, IO 3 − is reduced to a highly reactive intermediate product, iodite (IO 2 − ), which is rapidly reduced to the final product iodine (I 2 ) in the presence of phenolic compound [49, 51]. O 2 •− oxidizes catechol to generate H 2 O 2 (reaction G) [52].…”

Properties of Chlorogenic Acid Quinone: Relationship between Browning and the Formation of Hydrogen Peroxide from a Quinone Solution

“…They used polymer-supported periodate 18) for the oxidation of CQA, and the CQA solution was used without further puriˆcation. The diŠerence in methods might have led to diŠerent results.…”

Heterogeneous permanganate oxidations. 4. The oxidation of sulfides and selenides

“…For example, recent publications have described the heterogeneous oxidation of organic compounds by chromyl chloride cheniisorbed on silica/alumina (3), pyridinium chlorochromate or dichromate on molecular sieve (4), chromium trioxide on graphite, Celite, or silica gel ( 3 , alumina or silica supported sodium metaperiodate (6), clay supported iron(ll1) nitrate (7), silver carbonate on Celite (8), polymer supported iodate. periodate, pyridinium dichroniate, or hypochlorite (9), and permanganate on a variety of solid supports including molecular sieve (101, alumina ( 1 I), silica ( 12), or bentonite ( 13).…”