Zur Struktur und Konstitution von Dichloro(tetraalkylcyclobutadien)platin(II)-Komplexen - Steinborn, Dirk; Gerisch, M.; Heinemann, Frank Wilhelm; Scholz, Judith; Schenzel, K. (Zeitschrift für Anorganische und Allgemeine Chemie, 1995)

π-Stacking attraction vs. electrostatic repulsion: competing supramolecular interactions in a tpphz-bridged Ru(II)/Au(III) complex. - Sorsche, Dieter; Schaub, Markus; Heinemann, Frank Wilhelm; Habermehl, Johannes; Kuhri, Susanne; Guldi, Dirk Michael; Guthmuller, Julien; Rau, Sven (Dalton Transactions, 2016)
The synthesis and characterization of a mixed metal ruthenium(ii)/gold(iii) complex bridged by tetrapyridophenazine (tpphz) are described. It is isostructural and isoelectronic to the well-known photocatalysts with palladium(ii) or platinum(ii). Concentration dependent (1)H-NMR spectroscopy and XRD studies show that the electrostatic repulsion between the gold(iii) moieties exceeds the attractive π-stacking interaction. Theoretical calculations based on the new structural data confirm an increased positive charge on the bridging ligand as well as significantly altered orbital symmetry as compared to the previously investigated palladium(ii) complex. This is the first example of a tpphz ruthenium(ii) complex where π-stacking is completely inhibited. The detailed investigation of the solid-state structure showed for the first time in bimetallic tpphz bridged complexes no significant torsion within the bridging ligand itself. Although catalytic performance for proton reduction by gold(iii) is naturally not observed, its photochemical decomposition in colloidal gold particles could be shown by TEM and DLS.

Study of the effect of the introduction of Tris(bipyridine)ruthenium(II) chloride into silicon dioxide particles by spectrofluorometry methods - Irgibayeva, Irina; Mantel, Arthur; Barashkov, Nikolay; Lu, Olga; Yensebayeva, Akbota; Aldongarov, Anuar; Mendigaliyeva, Svetlana; Barashkova, Irina (Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy, 2021)
The Stoeber reaction was used to grow silica microparticles in the presence of the fluorescent dye Tris(bipyridine)ruthenium (II) chloride. The diameter of the obtained particles varies from about 150 to 280 nm depending on the dye concentration. Using spectrofluorometry methods, concentration quenching of fluorescence of dye solutions was studied before and after growing the microparticles. It was found out that the concentration quenching of fluorescence decreases significantly after its incorporation into the silicon dioxide microparticles upon excitation in the short-wavelength region of the spectrum.
CRIS-Team Scopus Importer:2020-10-23
Keywords: Concentration quenching; Excitation spectra; Fluorescence spectra; Silica microparticles; Stoeber reaction; Tris(bipyridine)ruthenium (II) chloride