Evidence against OH Radical Formation during Photocatalyzed Reduction of Manganese(III) in K2 [Mn(III)-2-α-hydroxyethyl-isochlorin e4]acetate in Oxygen Free Aqueous Alkaline Solutions

  • The hypothesis of GLIKMAN and ZABRODA (Biochemistry [USSR] 84,, 239 [1969]) that the primary electron donor during photoreduction of manganese(III) in Mn(III)-hydroxychlorin compounds in oxygen free aqueous alkaline solutions is the axially bound OH- ion was tested with Mn(III)-2-a-hydroxyethyl-isochlorin e4. It has been shown that 1) the primary generation of OH radicals upon irradiation of the complex is highly improbable, 2) light is not essential for the reduction reaction, 3) the kinetics of photoreduction of the Mn(III)-compound in 2 N NaOH clearly is not compatible with OH radical formation.

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Metadaten
Author:Gerhard Vierke, Manfred Müller
URN:urn:nbn:de:hebis:30:3-761690
DOI:https://doi.org/10.1515/znb-1976-0621
ISSN:1865-7117
ISSN:0932-0776
Parent Title (German):Zeitschrift für Naturforschung, B
Publisher:Verlag der Zeitschrift für Naturforschung
Place of publication:Tübingen
Document Type:Article
Language:English
Date of Publication (online):2014/06/02
Year of first Publication:1976
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2023/12/29
Tag:Kinetics; Mn(III)-Chlorin; OH Radical; Photoreduction
Volume:31.1976
Issue:6
Page Number:4
First Page:816
Last Page:819
Institutes:Biochemie, Chemie und Pharmazie / Biochemie und Chemie
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften
Sammlungen:Universitätspublikationen
Licence (German):License LogoCreative Commons - Namensnennung-Nicht kommerziell-Keine Bearbeitung 3.0