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-)
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F05%3A00022082" target="_blank" >RIV/61388955:_____/05:00022082 - isvavai.cz</a>
Result on the web
—
DOI - Digital Object Identifier
—
Alternative languages
Result language
angličtina
Original language name
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-)
Original language 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 ...
Czech name
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-)
Czech description
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.
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
<a href="/en/project/GA203%2F03%2F0821" target="_blank" >GA203/03/0821: Electron transfer to new supramolecular complexes, large molecules with multiple active centers and ordered structures</a><br>
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2005
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Inorganic Chemistry
ISSN
0020-1669
e-ISSN
—
Volume of the periodical
44
Issue of the periodical within the volume
9
Country of publishing house
US - UNITED STATES
Number of pages
5
Pages from-to
3210-3214
UT code for WoS article
—
EID of the result in the Scopus database
—