About: 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

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About: 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 Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
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)
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)
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)
skos:notation	RIV/61388955:_____/07:00084290!RIV08-MSM-61388955
http://linked.open.../vavai/riv/strany	1934;1938
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(OC 139), P(OC 140), Z(AV0Z40400503)
http://linked.open...iv/cisloPeriodika	-
http://linked.open...vai/riv/dodaniDat	2008
http://linked.open...aciTvurceVysledku	Fiedler, Jan
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav fyzikální chemie J. Heyrovského AV ČR, v.v.i.
http://linked.open...dnocenehoVysledku	409995
http://linked.open...ai/riv/idVysledku	RIV/61388955:_____/07:00084290
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	spectroelectrochemical properties; electronic structure; ruthenium complexes; metal complexes (en)
http://linked.open.../riv/klicoveSlovo	electronic structure metal complexes ruthenium complexes spectroelectrochemical properties
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[65A4BF2FD0DA]
http://linked.open...i/riv/nazevZdroje	Dalton Transactions
http://linked.open...in/vavai/riv/obor	CG
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	7 (xsd:int)
http://linked.open...vavai/riv/projekt	http://linked.opendata.cz/resource/domain/vavai/projekt/OC%20140 http://linked.opendata.cz/resource/domain/vavai/projekt/OC%20139
http://linked.open...UplatneniVysledku	2007
http://linked.open...v/svazekPeriodika	19
http://linked.open...iv/tvurceVysledku	Fiedler, Jan Kaim, W. Lahiri, G. K. Sarkar, B. Kar, S. Leboschka, M. Ghumaan, S.
http://linked.open...n/vavai/riv/zamer	Struktura, reaktivita a dynamika molekulárních a biomolekulárních systémů: teorie, experiment, aplikace
issn	1477-9226
number of pages	5 (xsd:int)
is http://linked.open...avai/riv/vysledek of	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 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

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