Novel Luminescent Tricarbonylrhenium(I) Polypyridine Tyramine-Derived Dipicolylamine Complexes as Sensors for Zinc(II) and Cadmium(II) Ions
| Autor: | Kenneth Kam-Wing Lo, Tai-Chu Lau, Man Wai Ray Louie, Hua-Wei Liu, Marco Ho Chuen Lam |
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| Rok vydání: | 2009 |
| Předmět: | |
| Zdroj: | Organometallics. 28:4297-4307 |
| ISSN: | 1520-6041 0276-7333 |
| DOI: | 10.1021/om900311s |
| Popis: | Three luminescent tricarbonylrhenium(I) polypyridine complexes containing a tyramine-derived 2,2′-dipicolylamine (DPAT) unit, [Re(N∧N)(CO)3(py-TU-DPAT)](CF3SO3) (py-TU-DPAT = 3-(2-(4-hydroxy-3-(2,2′-dipicolylaminomethyl)phenyl)ethylthioureidyl)pyridine; N∧N = 1,10-phenanthroline (phen) (1a), 3,4,7,8-tetramethyl-1,10-phenanthroline (Me4-phen) (2a), 4,7-diphenyl-1,10-phenanthroline (Ph2-phen) (3a)), and their DPAT-free counterparts, [Re(N∧N)(CO)3(py-TU-Et)](CF3SO3) (py-TU-Et = 3-(ethylthioureidyl)pyridine; N∧N = phen (1b), Me4-phen (2b), Ph2-phen (3b)), have been synthesized and characterized. Their electrochemical and photophysical properties have been studied. Upon photoexcitation, all the complexes exhibited triplet metal-to-ligand charge-transfer (3MLCT) (dπ(Re) → π*(N∧N)) emission in fluid solutions at 298 K and in low-temperature alcohol glass. The DPAT complexes showed lower emission quantum yields and shorter emission lifetimes compared to those of the DPAT-free analogues, indicative of the quenchin... |
| Databáze: | OpenAIRE |
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