1059575-28-8Relevant academic research and scientific papers
Controlling Spin-Correlated Radical Pairs with Donor–Acceptor Dyads: A New Concept to Generate Reduced Metal Complexes for More Efficient Photocatalysis
Neumann, Svenja,Wenger, Oliver S.,Kerzig, Christoph
, p. 4115 - 4123 (2021)
One-electron reduced metal complexes derived from photoactive ruthenium or iridium complexes are important intermediates for substrate activation steps in photoredox catalysis and for the photocatalytic generation of solar fuels. However, owing to the hea
Fundamentally Different Distance Dependences of Electron-Transfer Rates for Low and High Driving Forces
Neumann, Svenja,Wenger, Oliver S.
supporting information, p. 855 - 860 (2019/01/11)
The distance dependences of electron-transfer rates (kET) in three homologous series of donor-bridge-acceptor compounds with reaction free energies (ΔGET0) of ca. -1.2, -1.6, and -2.0 eV for thermal charge recombination after initial photoinduced charge separation were studied by transient absorption spectroscopy. In the series with low driving force, the distance dependence is normal and kET decreases upon donor-acceptor distance (rDA) elongation. In the two series with higher driving forces, kET increases with increasing distance over a certain range. This counterintuitive behavior can be explained by a weakly distance-dependent electronic donor-acceptor coupling (HDA) in combination with an increasing reorganization energy (λ). Our study shows that highly exergonic electron transfers can have distance dependences that differ drastically from those of the more commonly investigated weakly exergonic reactions.
Synthesis and characterization of a new iridium(III) complex with bulky trimethylsilylxylene and applications for efficient yellow-green emitting phosphorescent organic light emitting diodes
So, Ki Ho,Kim, Ran,Park, Hyuntae,Kang, Il,Thangaraju,Park, Young Seo,Kim, Jang Joo,Kwon, Soon-Ki,Kim, Yun-Hi
experimental part, p. 603 - 609 (2012/02/01)
We designed and synthesized a new iridium(III) complex with phenylpyridine ligands containing a bulky trimethylsilylxylene, 5-(2,5-dimethyl-4- (trimethylsilyl)phenyl)-2-phenylpyridine, by Suzuki coupling reaction and characterized using various spectrosco
Microsecond charge recombination in a linear triarylamine-Ru(bpy) 32+-anthraquinone triad
Hankache, Jihane,Wenger, Oliver S.
supporting information; experimental part, p. 10145 - 10147 (2011/10/09)
Linear triads with ruthenium photosensitizers are frequently based on the Ru(terpyridine)22+ unit. We report on vectorial photoinduced electron transfer in a linear triad based on the Ru(bipyridine)32+ photosensitizer. Electron-hole separation over a 22 A-distance is established with a quantum yield greater than 64% and persists for 1.3 μs in acetonitrile. The Royal Society of Chemistry 2011.
Energy transfer from rhenium(i) complexes to covalently attached anthracenes and phenanthrenes
Walther, Mathieu E.,Wenger, Oliver S.
, p. 6311 - 6318 (2009/03/11)
The synthesis and photophysical properties of a series of chromophore-quencher complexes are reported. They are all comprised of a luminescent rhenium(i) tricarbonyl diimine complex that is covalently attached to anthracene or phenanthrene moieties via rigid rod-like p-xylene bridges of variable lengths. Rhenium-to-anthracene energy transfer is strongly exergonic (-ΔG0≈ 0.9 eV) and causes very efficient rhenium MLCT luminescence quenching. By contrast, rhenium-to-phenanthrene energy transfer is only observed when complexes with sufficiently high MLCT energies are used because for these dyads, the driving force for energy transfer is low (-ΔG0≈ 0.1 eV). For a ～15 donor-acceptor distance, the rate constants of the weakly and the strongly exergonic energy transfer processes differ by more than 3 orders of magnitude. The Royal Society of Chemistry 2008.
