AI Article Synopsis
- Accurate determination of transient electronic structures is essential for understanding photochemical reactions in chemistry and biology.
- Researchers have successfully detected rapid chemical changes occurring on the picosecond timescale using x-ray absorption techniques.
- Upon laser pulse excitation of the [Ru(bpy)(3)](2+) complex, a charge transfer state with a 300 ns lifetime is generated, allowing for observation of changes in the Ru atom's oxidation state with high temporal resolution.
Article Abstract
Accurate determination of the transient electronic structures, which drive photochemical reactions, is crucial in chemistry and biology. We report the detection of transient chemical changes on the picosecond time scale by x-ray-absorption near-edge structure of photoexcited aqueous [Ru(bpy)(3)](2+). Upon ultrashort laser pulse excitation a charge transfer excited state having a 300 ns lifetime is formed. We detect the change of oxidation state of the central Ru atom at its L3 and L2 edges, at a temporal resolution of 100 ps with the zero of time unambiguously determined.
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| http://dx.doi.org/10.1103/PhysRevLett.90.047403 | DOI Listing |
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