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Description
| - Neobvyklý stav ligandového můstku 1,4-bis(2-fenolato)-1,4-diazabutadienu = glyoxalbis(2-hydroxyanil) (L2-) je ustaven v {(.mu.-L2´´)[RuII(bpy)2]2}2+ (12+), získaném jako bis-perchlorát. Čtyři dobře dostupné redox formy 1n (n = 4+, 3+, 2+, +) byly charakterizovány UV-VIS-NIR spektroelektrochemií. Meziprodukty (3+ ) a (+ ) byly rovněž vyšetřovány s použitím EPR, oba vykazují radikálový typ signálu blízko g = 2. Pozorování je v příkrém rozporu s EPR výsledky dříve získanými pro příbuzný [(.mu.-L)[Ru(acac)2]2}n, n = + a -, se spinem lokalizovaném na kovu. Ve spojení s UV-VIS-NIR spektry tyto výsledky naznačují převládající účast ligandového redox systém Ln´´ v elektronových přenosech. Relativně stabilizovaný RuII stav prostřednictvím .pi.-akceptoru bpy je zodpovědný za oxidaci ligandu L2- namísto kovu. (cs)
- The rare bridging mode of 1,4-bis(2-phenolato)-1,4-diazabutadiene = glyoxalbis(2-hydroxyanil) (L2–) is adopted in {(.mu.-L2-)[RuII(bpy)2]2}2+ (12+), obtained as bis-perchlorate. Four well accessible redox forms of 1n (n = 4+, 3+, 2+, +) have been characterized by UV-VIS-NIR spectroelectrochemistry. The (3+) and (+) intermediates have also been investigated by EPR, both showing radical-type signals close to g = 2. The observation stands in stark contrast to EPR results previously obtained for the related [(.mu.-L)[Ru(acac)2]2}n, n = + and -, both of which exhibit metal centered spin. In combination with the UV-Vis-NIR spectra these results suggest the preferential involvement of the multistep ligand redox system Ln´´- in the electron transfer processes. The relative stabilization of RuII by .pi.-accepting bpy is made responsible for the oxidation of the ligand L2- instead of the metal.
- The rare bridging mode of 1,4-bis(2-phenolato)-1,4-diazabutadiene = glyoxalbis(2-hydroxyanil) (L2–) is adopted in {(.mu.-L2-)[RuII(bpy)2]2}2+ (12+), obtained as bis-perchlorate. Four well accessible redox forms of 1n (n = 4+, 3+, 2+, +) have been characterized by UV-VIS-NIR spectroelectrochemistry. The (3+) and (+) intermediates have also been investigated by EPR, both showing radical-type signals close to g = 2. The observation stands in stark contrast to EPR results previously obtained for the related [(.mu.-L)[Ru(acac)2]2}n, n = + and -, both of which exhibit metal centered spin. In combination with the UV-Vis-NIR spectra these results suggest the preferential involvement of the multistep ligand redox system Ln´´- in the electron transfer processes. The relative stabilization of RuII by .pi.-accepting bpy is made responsible for the oxidation of the ligand L2- instead of the metal. (en)
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Title
| - Ancillary ligand determination of the spin location in both oxidized and reduced forms of diruthenium complexes bridged by bis-bidentate 1,4-bis(2-phenolato)-1,4-diazabutadiene
- Ancillary ligand determination of the spin location in both oxidized and reduced forms of diruthenium complexes bridged by bis-bidentate 1,4-bis(2-phenolato)-1,4-diazabutadiene (en)
- Ovlivnění spinového rozložení pobočným ligandem u oxidované a redukované formy dirutheniových komplexů s můstkovým bis-bidentátním ligandem 1,4-bis(2-fenolato)-1,4-diazabutadienem (cs)
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skos:prefLabel
| - Ancillary ligand determination of the spin location in both oxidized and reduced forms of diruthenium complexes bridged by bis-bidentate 1,4-bis(2-phenolato)-1,4-diazabutadiene
- Ancillary ligand determination of the spin location in both oxidized and reduced forms of diruthenium complexes bridged by bis-bidentate 1,4-bis(2-phenolato)-1,4-diazabutadiene (en)
- Ovlivnění spinového rozložení pobočným ligandem u oxidované a redukované formy dirutheniových komplexů s můstkovým bis-bidentátním ligandem 1,4-bis(2-fenolato)-1,4-diazabutadienem (cs)
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skos:notation
| - RIV/61388955:_____/07:00084290!RIV08-MSM-61388955
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http://linked.open.../vavai/riv/strany
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http://linked.open...avai/riv/aktivita
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http://linked.open...avai/riv/aktivity
| - P(OC 139), P(OC 140), Z(AV0Z40400503)
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http://linked.open...iv/cisloPeriodika
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http://linked.open...vai/riv/dodaniDat
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http://linked.open...aciTvurceVysledku
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http://linked.open.../riv/druhVysledku
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http://linked.open...iv/duvernostUdaju
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http://linked.open...titaPredkladatele
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http://linked.open...dnocenehoVysledku
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http://linked.open...ai/riv/idVysledku
| - RIV/61388955:_____/07:00084290
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http://linked.open...riv/jazykVysledku
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http://linked.open.../riv/klicovaSlova
| - spectroelectrochemical properties; electronic structure; ruthenium complexes; metal complexes (en)
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http://linked.open.../riv/klicoveSlovo
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http://linked.open...odStatuVydavatele
| - GB - Spojené království Velké Británie a Severního Irska
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http://linked.open...ontrolniKodProRIV
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http://linked.open...i/riv/nazevZdroje
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http://linked.open...in/vavai/riv/obor
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http://linked.open...ichTvurcuVysledku
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http://linked.open...cetTvurcuVysledku
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http://linked.open...vavai/riv/projekt
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http://linked.open...UplatneniVysledku
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http://linked.open...v/svazekPeriodika
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http://linked.open...iv/tvurceVysledku
| - Fiedler, Jan
- Kaim, W.
- Lahiri, G. K.
- Sarkar, B.
- Kar, S.
- Leboschka, M.
- Ghumaan, S.
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http://linked.open...n/vavai/riv/zamer
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issn
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number of pages
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