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Multiple one-electron oxidation and reduction of trinuclear bis(2,4-pentanedionato)ruthenium complexes with substituted diquinoxalino[2,3-a:2´,3´-c]phenazine ligands

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F07%3A00084868" target="_blank" >RIV/61388955:_____/07:00084868 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Multiple one-electron oxidation and reduction of trinuclear bis(2,4-pentanedionato)ruthenium complexes with substituted diquinoxalino[2,3-a:2´,3´-c]phenazine ligands

  • Original language description

    The complexes (.mu.3-L1/L2)[Ru(acac)2]3, acac- = 2,4-pentanedionato, L1 = 2,3,8,9,14,15-hexachlorodiquinoxalino[2,3-a:2?,3?-c]phenazine and L2 = 2,3,8,9,14,15-hexamethyldiquinoxalino[2,3-a:2?,3?-c]phenazine, undergo stepwise one-electron oxidation involving a total of three electrons and stepwise one-electron reduction with three (L2) or four electrons (L1). All reversibly accessible states were characterized by UV?Vis?NIR spectroelectrochemistry. Oxidation leads to mixed-valent intermediates {(.mu.3-L)[Ru(acac)2]3}+ and {(.mu.3-L)[Ru(acac)2]3}2+ of which the RuIIIRuIIRuII combinations exhibit higher comproportionation constants Kc than the RuIIIRuIIIRuII states ? in contrast to a previous report for the unsubstituted parent systems {(.mu.3-L3)[Ru(acac)2]3}+/2+, L3 = diquinoxalino[2,3-a:2´,3´-c]phenazine. No conspicuous inter-valence charge transfer absorptions were observed for the mixed-valent intermediates in the visible to near-infrared regions.

  • Czech name

    Vícenásobná jednoelektronová oxidace a redukce tříjaderných bis(1,3-pentanedionato)rutheniových komplexů se substituovanými dichinoxalin[2,3-: 2´,3´-c] fenaziny

  • Czech description

    Komplexy (.mu.3-L1/L2)[Ru(acac)2]3, acac- = 2,4-pentanedionato, L1 = 2,3,8,9,14,15-hexachlorodichinoxalino[2,3-:2',3'-c] fenazin a L2 = 2,3,8,9,14,15-hexamethyldichinoxalino[2,3-:2',3'-c] fenazin, podléhají postupné jednoelektronové oxidaci zahrnující celkově tři elektrony a postupné jednoelektronové redukci se třemi (L2) nebo čtyřmi elektrony (L1). Všechny reversibilně dostupné stavy byly charakterizovány UV-VIS-NIR spektroelektrochemií. Oxidace vede k meziproduktům se smíšenou valencí {(.mu.3-L)[Ru(acac)2]3}+ a {(.mu.3-L)[Ru(acac)2]3}2+, z nichž kombinace RuIIIRuIIRuII vykazují vyšší komproporcionační konstanty Kc než RuIIIRuIIIRuII stavy ? na rozdíl od dříve popsaných nesubstituovaných mateřských systémů {(.mu.3-L3)[Ru(acac)2]3}+/2+/, L3 = dichinoxalino[2,3-:2´,3´-c] fenazin. Pro meziprodukty se smíšenou valencí nebyl pozorován v blízké infračervené oblasti žádný zřetelný absorbční pás přenosu náboje.

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    CG - Electrochemistry

  • OECD FORD branch

Result continuities

  • Project

    Result was created during the realization of more than one project. More information in the Projects tab.

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2007

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Polyhedron

  • ISSN

    0277-5387

  • e-ISSN

  • Volume of the periodical

    26

  • Issue of the periodical within the volume

    13

  • Country of publishing house

    NL - THE KINGDOM OF THE NETHERLANDS

  • Number of pages

    10

  • Pages from-to

    3409-3418

  • UT code for WoS article

  • EID of the result in the Scopus database