Molecular Dyads and Triads Based on Phenothiazine and π‐Extended Tetrathiafulvalene Donors, Bis(terpyridine)ruthenium(II) Complexes, and Polyoxometalates
| Autor: | Andreas Winter, Kevin Barthelmes, Maria Sittig, Ulrich S. Schubert |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_classification
Quenching (fluorescence) 010405 organic chemistry chemistry.chemical_element Electron acceptor 010402 general chemistry Photochemistry 01 natural sciences 0104 chemical sciences Ruthenium Inorganic Chemistry chemistry.chemical_compound Electron transfer chemistry Polyoxometalate Moiety sense organs Terpyridine Tetrathiafulvalene |
| Zdroj: | European Journal of Inorganic Chemistry. 2017:3698-3706 |
| ISSN: | 1099-0682 1434-1948 |
| DOI: | 10.1002/ejic.201700626 |
| Popis: | Molecular dyads were prepared by the functionalization of organic electron-donor units, that is, a phenothiazine (PTZ) moiety and a π-extended tetrathiafulvalene (exTTF) moiety, with bis(terpyridine)RuII complexes. In addition, the complexes were equipped with a terminal alkyne group, which was used for the coupling with a Keggin-type polyoxometalate (POM). In this regard, molecular triads were prepared, whereby the central RuII complex should act as a photosensitizer and the POM as an electron acceptor. Certain spectral changes were observed upon attachment of the donors and the POM framework to the RuII complexes. In particular, the emission of the RuII complex became significantly reduced with increasing donor strength, which suggested an intramolecular electron transfer by reductive emission quenching. The introduction of the POM framework revealed no further quenching of the emission and is tentatively ascribed to the minor influence of the electron acceptor on the excited states of the RuII complex. |
| Databáze: | OpenAIRE |
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