Azobenzene-based ruthenium(ii) catalysts for light-controlled hydrogen generation
| Autor: | Ainara Telleria, Zoraida Freixa, P. W. N. M. van Leeuwen |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Photoisomerization
010405 organic chemistry Chemistry chemistry.chemical_element 010402 general chemistry Photochemistry 01 natural sciences 0104 chemical sciences Catalysis Ruthenium Inorganic Chemistry chemistry.chemical_compound Bipyridine Azobenzene Pyridine Polymer chemistry Phosphine Hydrogen production |
| Zdroj: | Dalton transactions (Cambridge, England : 2003). 46(11) |
| ISSN: | 1477-9234 |
| Popis: | Eight new ruthenium(II) half-sandwich complexes containing azobenzene-appended pyridine (1), bipyridine (2–5) and phosphine (6 and 7) ligands have been synthesized and fully characterized. UV-vis spectroscopic studies showed that the trans-to-cis photoisomerization was strongly inhibited upon coordination to the metal centre in azopyridine-derived ligands 1 and 2, but it remained efficient in azobenzene-appended bipyridine (3–5) and phosphine (6 and 7) ligands. The complexes were tested as precatalysts for photo-controlled hydrogen generation by hydrolytic decomposition of ammonia-borane (AB). In situ irradiation of the reaction mixtures of compounds [Ru(p-Cym)(6)Cl]Cl and [Ru(p-Cym)(7)Cl]Cl induced a clear change in the catalytic reaction rate, serving as a proof of concept for light-controlled hydrogen generation. |
| Databáze: | OpenAIRE |
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