{"id":22312,"date":"2020-07-07T15:16:00","date_gmt":"2020-07-07T12:16:00","guid":{"rendered":"https:\/\/en.buradabiliyorum.com\/scientists-reveal-mechanism-of-dioxygen-activation\/"},"modified":"2020-07-07T15:16:00","modified_gmt":"2020-07-07T12:16:00","slug":"scientists-reveal-mechanism-of-dioxygen-activation","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/scientists-reveal-mechanism-of-dioxygen-activation\/","title":{"rendered":"#Scientists reveal mechanism of dioxygen activation"},"content":{"rendered":"

“#Scientists reveal mechanism of dioxygen activation<\/strong>”<\/p>\n

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\"metal\"<\/img>
\n Credit: Pixabay\/CC0 Public Domain
\n <\/figcaption><\/figure>\n<\/div>\n<\/div>\n

Metalloenzyme can couple dioxygen activation to substrate functionalization, which often exhibits unrivaled efficiency, even at ambient conditions.<\/p>\n

It is believed that metal-superoxo intermedia<\/a>tes are formed in dioxygen activation, and then further reduced to metal-peroxo and ultimately to -oxo species. However, the chemistry of metal-superoxo complexes remains largely unknown.<\/p>\n

In their previous study, researchers led by Prof. Ye Shengfa from the Dalian Institute of Chemical Physics (DICP) of the Chinese Academy of Science<\/a>s and their collaborators discovered that treating divalent Mn(II), Fe(II), and Co(II) model complexes and\/or enzymes with dioxygen generated corresponding short-lived trivalent metal-superoxo intermediates. They could be transformed into trivalent metal-hydroperoxo species via H atom abstraction.
\nRecently, the scientists examined the reactions of a Mn(III)-superoxo complex with Bronsted and Lewis acids using resonance Raman, multi-frequency electron paramagnetic resonance spectroscopies coupled with quantum chemical calculations.
\nThey revealed that the Mn(III)-superoxo complex underwent proton- and metal-coupled electron transfer to yield a Mn(IV)-hydroperoxo and a Mn(IV)-peroxo-Sc(III) species, respectively, thereby manifesting ambiphilic character of metal-superoxo complexes.
\nThis unprecedented method to generate superoxo-to-peroxo conversion represents an important step toward better understanding of dioxygen activation and evolution processes occurring in metalloenzymes and artificial catalysts.
\nThe study was published in the Journal of the American Chemical Society<\/i>.<\/p>\n

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More information:<\/strong>
\n Yen-Hao Lin et al. A Manga<\/a>nese(IV)-Hydroperoxo Intermediate Generated by Protonation of the Corresponding Manganese(III)-Superoxo Complex, Journal of the American Chemical Society<\/i> (2020). DOI: 10.1021\/jacs.0c02756\n <\/div>\n

\n Citation<\/strong>:
\n Scientists reveal mechanism of dioxygen activation (2020, July 7)
\n retrieved 7 July 2020
\n from https:\/\/phys.org\/news<\/a>\/2020-07-scientists-reveal-mechanism-dioxygen.html<\/p>\n

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“#Scientists reveal mechanism of dioxygen activation” Credit: Pixabay\/CC0 Public Domain Metalloenzyme can couple dioxygen activation to substrate functionalization, which often exhibits unrivaled efficiency, even at ambient conditions. It is believed that metal-superoxo intermediates are formed in dioxygen activation, and then further reduced to metal-peroxo and ultimately to -oxo species. However, the chemistry of metal-superoxo complexes…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[16],"tags":[10601,33953],"class_list":["post-22312","post","type-post","status-publish","format-standard","hentry","category-sciencee","tag-materials-science","tag-scientists-reveal-mechanism-of-dioxygen-activation"],"_links":{"self":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/22312","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/comments?post=22312"}],"version-history":[{"count":0,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/22312\/revisions"}],"wp:attachment":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/media?parent=22312"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/categories?post=22312"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/tags?post=22312"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}