AI Article Synopsis
- Low-energy electrons in liquid ammonia and water are effective reducing agents but can inflict radiation damage on biological tissues, with incomplete understanding of their electron transfer mechanisms.
- This research demonstrates that UV photoexcitation of metal-ammonia clusters can generate controllable low-energy electrons in situ through the formation of spin-paired solvated dielectrons.
- The findings suggest a reliable method to produce low-energy electrons, which could enhance our knowledge of radiation effects and electron reduction reaction mechanisms.
Article Abstract
Low-energy electrons dissolved in liquid ammonia or aqueous media are powerful reducing agents that promote challenging reduction reactions but can also cause radiation damage to biological tissue. Knowledge of the underlying mechanistic processes remains incomplete, particularly with respect to the details and energetics of the electron transfer steps. In this work, we show how ultraviolet (UV) photoexcitation of metal-ammonia clusters could be used to generate tunable low-energy electrons in situ. Specifically, we identified UV light-induced generation of spin-paired solvated dielectrons and their subsequent relaxation by an unconventional electron transfer-mediated decay as an efficient, low-energy electron source. The process is robust and straightforward to induce with the prospect of improving our understanding of radiation damage and fostering mechanistic studies of solvated electron reduction reactions.
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| http://dx.doi.org/10.1126/science.adh0184 | DOI Listing |
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