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Isomeric separation in donor–acceptor systems of Pd(II) and Pt(II) and a combined structural, electrochemical and spectroelectrochemical study
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SYSNO ASEP 0369089 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Isomeric separation in donor–acceptor systems of Pd(II) and Pt(II) and a combined structural, electrochemical and spectroelectrochemical study Author(s) Deibel, N. (DE)
Schweinfurth, D. (DE)
Fiedler, Jan (UFCH-W) RID, ORCID
Záliš, Stanislav (UFCH-W) RID, ORCID
Sarkar, B. (DE)Source Title Dalton Transactions. - : Royal Society of Chemistry - ISSN 1477-9226
Roč. 40, č. 38 (2011), s. 9925-9934Number of pages 10 s. Language eng - English Country GB - United Kingdom Keywords electrochemistry ; spectroelectrochemistry ; palladium Subject RIV CG - Electrochemistry R&D Projects LD11086 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000295038400034 DOI 10.1039/C1DT10856E Annotation Compounds of the form [(pap)M(Q2−)] (pap = phenylazopyridine; Q = 3,5-di-tert-butyl-benzoquinone, M = Pd, 1a and 1b, M = Pt, 2a and 2b; Q = 4-tert-butyl-benzoquinone, M = Pd, 3a and 3b; M = Pt, 4a and 4b) were synthesized in a one-pot reaction. The geometrical isomers, which are possible because of the built in asymmetry of these ligands, have been separated by using different temperatures and variable solubility. Structural characterization of 1b shows that the metal centers are in a square planar environment, the pap ligand is in the unreduced neutral state and the quinones are in the doubly reduced, Q2− catecholate form.Cyclic voltammetric measurements on the complexes display two one-electron oxidations and two one-electron reductions. EPR and vis-NIR spectra of the one-electron oxidized forms of the complexes indicate that the first oxidation takes place on the Q2− ligands to produce a metal bound semiquinone (Q−) radical. 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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