About: 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

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About: 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 Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
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. (cs) 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. 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. (en)
Title	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 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 (en) Vícenásobná jednoelektronová oxidace a redukce tříjaderných bis(1,3-pentanedionato)rutheniových komplexů se substituovanými dichinoxalin[2,3-: 2´,3´-c] fenaziny (cs)
skos:prefLabel	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 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 (en) Vícenásobná jednoelektronová oxidace a redukce tříjaderných bis(1,3-pentanedionato)rutheniových komplexů se substituovanými dichinoxalin[2,3-: 2´,3´-c] fenaziny (cs)
skos:notation	RIV/61388955:_____/07:00084868!RIV08-MSM-61388955
http://linked.open.../vavai/riv/strany	3409;3418
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(1P05OC068), P(LC510), Z(AV0Z40400503)
http://linked.open...iv/cisloPeriodika	13
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	435697
http://linked.open...ai/riv/idVysledku	RIV/61388955:_____/07:00084868
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	DFT calculation; EPR; radical complexes; electrochemistry (en)
http://linked.open.../riv/klicoveSlovo	EPR radical complexes DFT calculation electrochemistry
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[90EC8C2478A8]
http://linked.open...i/riv/nazevZdroje	Polyhedron
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	Center of nanotechnology and materials for nanoelectronics Control of functional behaviour of transition - metal compounds
http://linked.open...UplatneniVysledku	2007
http://linked.open...v/svazekPeriodika	26
http://linked.open...iv/tvurceVysledku	Fiedler, Jan Kaim, W. Lahiri, G. K. Sarkar, B. Sunoj, R. B. Ghumaan, S. Patil, M. P.
http://linked.open...n/vavai/riv/zamer	Struktura, reaktivita a dynamika molekulárních a biomolekulárních systémů: teorie, experiment, aplikace
issn	0277-5387
number of pages	10 (xsd:int)
is http://linked.open...avai/riv/vysledek of	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 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 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

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