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Redox-Rich Spin-Spin-Coupled Semiquinoneruthenium Dimers with Intense Near-IR Absorption

SYSNO ASEP	0360223
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Redox-Rich Spin-Spin-Coupled Semiquinoneruthenium Dimers with Intense Near-IR Absorption
Author(s)	Kundu, T. (IN) Sarkar, B. (DE) Mondal, T. K. (IN) Mobin, S. M. (IN) Urbanos, F. A. (ES) Fiedler, Jan (UFCH-W)_{RID, ORCID} Jimenez-Aparicio, R. (ES) Kaim, W. (DE) Lahiri, G. K. (IN)
Source Title	Inorganic Chemistry. - : American Chemical Society - ISSN 0020-1669 Roč. 50, č. 11 (2011), s. 4753-4763
Number of pages	11 s.
Language	eng - English
Country	US - United States
Keywords	transition metal complexes ; nuclear magnetic resonance ; density functional theory
Subject RIV	CF - Physical ; Theoretical Chemistry
R&D Projects	GA203/09/0705 GA ČR - Czech Science Foundation (CSF)
	LD11086 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
CEZ	AV0Z40400503 - UFCH-W (2005-2011)
UT WOS	000290978400016
DOI	10.1021/ic102280q
Annotation	Using the [RuCl(mu-tppz)ClRu](2+) [tppz=2,3,5,6-tetrakis(2-pyridyl)pyrazine] platform for bridging two o-quinone/catecholate two-step redox systems (unsubstituted,Q(n), or 3,5-ditert-butyl-substituted,DTBQ(n)), we have obtained the stable complexes [(Q(center dot-))(RuCl)-Cl-II(mu-tppz)ClRuII(Q(center dot-))] (1) and the structurally characterized [(DTBQ(center dot-))(RuCl)-Cl-II(mu-tppz)ClRuII(DTBQ(center dot-))] (2). The compounds exhibit mostly quinone-ligand-based redox activity within a narrow potential range, high-intensity near-IR absorptions (lambda(max) approximate to 920 nm; epsilon > 50 000 M-1 cm(-1)), and variable intra- and intermolecular spin-spin interactions. Density functional theory calculations, electron paramagnetic resonance (EPR), and spectro-electrochemical results (UV-vis-near-IR region) for three one-electron-reduction and two one-electron-oxidation processes were used to probe the electronic structures of the systems in the various accessible valence states.
Workplace	J. Heyrovsky Institute of Physical Chemistry
Contact	Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196
Year of Publishing	2012

Number of the records: 1