Heteroleptic ruthenium(ii ) chromophores based on tunable polytopic 4′-(benzamidinato)-2,2′:6′,2′′-terpyridines
| Autor: | Garry S. Hanan, Marie-Pierre Santoni, Michael W. Cooke, Bernold Hasenknopf |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010405 organic chemistry
Stereochemistry chemistry.chemical_element Nuclear magnetic resonance spectroscopy Chromophore 010402 general chemistry Electrochemistry 01 natural sciences Redox 3. Good health 0104 chemical sciences Ruthenium Inorganic Chemistry Amidine chemistry.chemical_compound chemistry Polymer chemistry Moiety Terpyridine |
| Zdroj: | Dalton Transactions. 45:17850-17858 |
| ISSN: | 1477-9234 1477-9226 |
| DOI: | 10.1039/c6dt03169b |
| Popis: | A modulable and simple approach towards heteroleptic ruthenium(II) complexes of amidine-based polypyridine ligands is presented. New complexes 1 and 2 ([(terpyridine)Ru(terpyridine-C6H4-C(NR)(NHR))]2+ with R = propyl and R = phenyl derivatives, respectively) were characterized by NMR spectroscopy in solution and by X-ray diffraction, which confirmed the obtention of the (E) stereoisomer alone. Depending on the bulkiness of the R-substituents introduced on the amidine moiety, rotational isomerism around the C–N bond could be observed at r.t. Spectroscopic and electrochemical studies showed that the nature of the R-substituents introduced on the amidine moiety can significantly influence the redox and ground-state acido-basic properties of the complexes, while maintaining their electronic features. This particular tunability of polytopic 4′-(amidinato)-terpyridines offers an interesting perspective for photoactive units in larger multi-functional arrays. |
| Databáze: | OpenAIRE |
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