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Statements

Subject Item
n2:RIV%2F61388955%3A_____%2F05%3A00022082%21RIV06-AV0-61388955
rdf:type
n10:Vysledek skos:Concept
dcterms:description
The new redox systems [(acac)(2)Ru(mu-Q(1))Ru(acac)(2)](n) (1(n)) and [(acac)(2)Ru(mu-Q(2))Ru(acac)(2)](n) (2(n)) with Q(1) = 1,10-phenanthroline-5,6-dione and Q(2) = 1,10-phenanthroline-5,6-diimine were studied for n = +,0,-, and 2- using UV-Vis-NIR spectroelectrochemistry, and, in part, EPR and susceptometry. The ligands can bind the first metal (left) through the phenanthroline nitrogen atoms and the second metal (right) at the o-quinonoid chelate site. The neutral compounds are already different: Compound 1 is formulated as a Ru-II(mu-Q(1))(center dot-) Ru-III species with partially coupled semiquinone and ruthenium(III) centers. In contrast, a Ru-III(mu-Q(2))(2-) Ru-III structure is assigned to 2, which shows a weak antiferromagnetic spin-spin interaction (J = -1.14 cm(-1)) and displays an intense half-field signal in the EPR spectrum. The one-electron reduced forms are also differently formulated as Ru-II(mu-Q(1))(2-) Ru-III for 1(-) with a Ru-III-typical EPR response and ... The new redox systems [(acac)(2)Ru(mu-Q(1))Ru(acac)(2)](n) (1(n)) and [(acac)(2)Ru(mu-Q(2))Ru(acac)(2)](n) (2(n)) with Q(1) = 1,10-phenanthroline-5,6-dione and Q(2) = 1,10-phenanthroline-5,6-diimine were studied for n = +,0,-, and 2- using UV-Vis-NIR spectroelectrochemistry, and, in part, EPR and susceptometry. The ligands can bind the first metal (left) through the phenanthroline nitrogen atoms and the second metal (right) at the o-quinonoid chelate site. The neutral compounds are already different: Compound 1 is formulated as a Ru-II(mu-Q(1))(center dot-) Ru-III species with partially coupled semiquinone and ruthenium(III) centers. In contrast, a Ru-III(mu-Q(2))(2-) Ru-III structure is assigned to 2, which shows a weak antiferromagnetic spin-spin interaction (J = -1.14 cm(-1)) and displays an intense half-field signal in the EPR spectrum. The one-electron reduced forms are also differently formulated as Ru-II(mu-Q(1))(2-) Ru-III for 1(-) with a Ru-III-typical EPR response and ... Nové redox systémy [(acac)2Ru(mu-Q1) Ru(acac)2]n (1n) a [(acac)2Ru(mu-Q2) Ru(acac)2]n (2n) s Q1 = 1,10-fenanthrolin-5,6-dion a Q2 = 1,10-fenanthrolin-5,6-diimin, n = +, 0, -, a 2- byly studovány s použitím UV-VIS-NIR spektroelektrochemie a zčásti EPR a susceptometrie. Ligandy mohou vázat první kov (levý) přes fenanthrolinové dusíkové atomy a druhý kov (pravý) přes o-chinonoid chelátové místo. Již neutrální sloučeniny jsou už různé: Sloučenina 1 je formulována jako RuII(mu-Q1).- RuIII typ s silně spojeným semichinonovým a přímo koordinovaným rutheniovým(III) centrem. Naopak, RuIII(mu-Q2)2- RuIII strukturu lze přiřadit komplexu 2, který vykazuje slabou antiferromagnetickou spin-spin interakci (J = -1.14 cm-1) a dává intenzivní half-field signál v EPR spektru. Jedenoelektronové redukované formy jsou také odlišně formulované, jako RuII(mu-Q1)2- RuIII pro 1- s RuIII typickou EPR odezvou, a jako RuII(mu-Q2).- RuII pro 2- s radikálovým typem EPR signálu u g = 2.0020.
dcterms:title
Sensitive oxidation state ambivalence in unsymmetrical three-center (M/Q/M) systems [(acac)2Ru(mu-Q)Ru(acac)2]n, Q=1,10-phenanthroline-5,6-dione or 1,10-phenanthroline-5,6-diimine (n = +, 0, -, 2-) Sensitive oxidation state ambivalence in unsymmetrical three-center (M/Q/M) systems [(acac)2Ru(mu-Q)Ru(acac)2]n, Q=1,10-phenanthroline-5,6-dione or 1,10-phenanthroline-5,6-diimine (n = +, 0, -, 2-) Nejednoznačnost oxidačních stavů v nesymetrických systémech s třemi centry (M/Q/M ) [(acac)2Ru(mu-Q)Ru(acac)2]n, Q=1,10-phenanthroline-5,6-dione nebo 1,10-phenanthroline-5,6-diimine (n = +, 0, -, 2-)
skos:prefLabel
Nejednoznačnost oxidačních stavů v nesymetrických systémech s třemi centry (M/Q/M ) [(acac)2Ru(mu-Q)Ru(acac)2]n, Q=1,10-phenanthroline-5,6-dione nebo 1,10-phenanthroline-5,6-diimine (n = +, 0, -, 2-) Sensitive oxidation state ambivalence in unsymmetrical three-center (M/Q/M) systems [(acac)2Ru(mu-Q)Ru(acac)2]n, Q=1,10-phenanthroline-5,6-dione or 1,10-phenanthroline-5,6-diimine (n = +, 0, -, 2-) Sensitive oxidation state ambivalence in unsymmetrical three-center (M/Q/M) systems [(acac)2Ru(mu-Q)Ru(acac)2]n, Q=1,10-phenanthroline-5,6-dione or 1,10-phenanthroline-5,6-diimine (n = +, 0, -, 2-)
skos:notation
RIV/61388955:_____/05:00022082!RIV06-AV0-61388955
n4:strany
3210;3214
n4:aktivita
n15:Z n15:P
n4:aktivity
P(GA203/03/0821), Z(AV0Z40400503)
n4:cisloPeriodika
9
n4:dodaniDat
n11:2006
n4:domaciTvurceVysledku
n8:3742121
n4:druhVysledku
n6:J
n4:duvernostUdaju
n14:S
n4:entitaPredkladatele
n18:predkladatel
n4:idSjednocenehoVysledku
542305
n4:idVysledku
RIV/61388955:_____/05:00022082
n4:jazykVysledku
n9:eng
n4:klicovaSlova
transition-metal complexes; electrochemistry; bunuclear complexes
n4:klicoveSlovo
n5:electrochemistry n5:bunuclear%20complexes n5:transition-metal%20complexes
n4:kodStatuVydavatele
US - Spojené státy americké
n4:kontrolniKodProRIV
[3AFEA613ECDA]
n4:nazevZdroje
Inorganic Chemistry
n4:obor
n12:CG
n4:pocetDomacichTvurcuVysledku
1
n4:pocetTvurcuVysledku
7
n4:projekt
n17:GA203%2F03%2F0821
n4:rokUplatneniVysledku
n11:2005
n4:svazekPeriodika
44
n4:tvurceVysledku
Kaim, W. Patra, S. Fiedler, Jan Lahiri, G. K. Ghumaan, S. Sarkar, B. van Slageren, J.
n4:zamer
n13:AV0Z40400503
s:issn
0020-1669
s:numberOfPages
5