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Invariant Oxidation State of Copper but not of Ruthenium in Complexes with Noninnocent N-(2-Methyl-5,8-dioxo-5,8-dihydroquinolin-7-yl)acetamide: A Combined Structural, Electrochemical and Spectroelectrochemical Investigation
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SYSNO ASEP 0359540 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Invariant Oxidation State of Copper but not of Ruthenium in Complexes with Noninnocent N-(2-Methyl-5,8-dioxo-5,8-dihydroquinolin-7-yl)acetamide: A Combined Structural, Electrochemical and Spectroelectrochemical Investigation Author(s) Paretzki, A. (DE)
Das, H. S. (DE)
Weisser, F. (DE)
Scherer, T. (DE)
Bubrin, D. (DE)
Fiedler, Jan (UFCH-W) RID, ORCID
Nycz, J. E. (PL)
Sarkar, B. (DE)Source Title European Journal of Inorganic Chemistry. - : Wiley - ISSN 1434-1948
-, č. 15 (2011), s. 2413-2421Number of pages 9 s. Language eng - English Country DE - Germany Keywords copper ; ruthenium ; quinones Subject RIV CF - Physical ; Theoretical Chemistry R&D Projects GA203/09/0705 GA ČR - Czech Science Foundation (CSF) GA203/08/1157 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000290706700008 DOI 10.1002/ejic.201100008 Annotation The compounds [(dppf)Cu(L)](BF4) (1[BF4]) [dppf = 1,1′-bis(diphenylphosphanylferrocene), L = N-(2-methyl-5,8-dioxo-5,8-dihydroquinolin-7-yl)acetamide] and [(acac)2Ru(L)] (2) (acac = acetylacetonato) were prepared from the reactions of [Cu(dppf)(CH3CN)2](BF4) or [Ru(acac)2(CH3CN)2], respectively with L. Structural characterization of 1[BF4] shows a distorted tetrahedral coordinated copper center. Both complexes show one-electron reversible oxidation as well as reduction processes in their cyclic voltammogram. The first oxidation process of 1[BF4] leads to absorptions at around 900 nm in the UV/Vis/NIR spectrum and results in an EPR silent species up to 110 K thus indicating a dppf-centered oxidation. The reduction processes of 1[BF4] show features in the UV/Vis/NIR, IR as well as EPR spectrum that are compatible with L-centered redox processes. In contrast to this, the ruthenium complex 2 shows metal-centered spin in both the one-electron oxidized as well as reduced forms. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2012
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