Refine
Has Fulltext
- yes (2)
Is part of the Bibliography
- yes (2)
Document Type
- Journal article (1)
- Doctoral Thesis (1)
Language
- English (2)
Keywords
- Femtosekunden zeitaufgelöste Spektroskopie (1)
- Femtosekundenspektroskopie (1)
- Licht-Sammel-Komplex (1)
- Photorezeptor (1)
- RU-(II) complexes (1)
- Ru(II)–Fe(II)–Ru(II) complex (1)
- artificial light harvesting systems (1)
- biological photoreceptors (1)
- biologische Photorezeptoren (1)
- bis-terpyridyl ligands (1)
- femtosecond time-resolved spectroscopy (1)
- künstliche Lichtsammelsysteme (1)
- metal-to-ligand charge transfer (MLCT) (1)
- multimetallic complexes (1)
- polypyridyl complexes (1)
- transition metal complexes (1)
- Übergangsmetallkomplexe (1)
EU-Project number / Contract (GA) number
Multimetallic complexes with extended and highly conjugated bis-2,2':6',2''-terpyridyl bridging ligands, which present building blocks for coordination polymers, are investigated with respect to their ability to act as light-harvesting antennae. The investigated species combine Ru(II)- with Os(II)- and Fe(II)-terpyridyl chromophores, the latter acting as energy sinks. Due to the extended conjugated system the ligands are able to prolong the lifetime of the \(^3\)MLCT states compared to unsubstituted terpyridyl species by delocalization and energetic stabilization of the \(^3\)MLCT states. This concept is applied for the first time to Fe(II) terpyridyl species and results in an exceptionally long lifetime of 23 ps for the Fe(II) \(^3\)MLCT state. While partial energy (>80%) transfer is observed between the Ru(II) and Fe(II) centers with a time-constant of 15 ps, excitation energy is transferred completely from the Ru(II) to the Os(II) center within the first 200 fs after excitation.