Počet záznamů: 1

Isomeric separation in donor–acceptor systems of Pd(II) and Pt(II) and a combined structural, electrochemical and spectroelectrochemical study

  1. 1.
    0369089 - UFCH-W 2012 RIV GB eng J - Článek v odborném periodiku
    Deibel, N. - Schweinfurth, D. - Fiedler, Jan - Záliš, Stanislav - Sarkar, B.
    Isomeric separation in donor–acceptor systems of Pd(II) and Pt(II) and a combined structural, electrochemical and spectroelectrochemical study.
    Dalton Transactions. Roč. 40, č. 38 (2011), s. 9925-9934 ISSN 1477-9226
    Grant CEP: GA MŠk LD11086
    Výzkumný záměr: CEZ:AV0Z40400503
    Klíčová slova: electrochemistry * spectroelectrochemistry * palladium
    Kód oboru RIV: CG - Elektrochemie
    Impakt faktor: 3.838, rok: 2011

    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.
    Trvalý link: http://hdl.handle.net/11104/0203238