Catálogo de publicaciones - revistas

<jats:title>Orange-glowing iron at room temperature</jats:title> <jats:p> Many photoactive coordination compounds contain precious metals. Replacing ruthenium with more–earth-abundant iron has been a long-sought goal, but iron compounds generally relax too rapidly after light absorption to channel the energy productively. Kjær <jats:italic>et al.</jats:italic> prepared an iron compound with an excited state stable enough to emit light for nanoseconds, or that could engage in bimolecular electron transfer (see the Perspective by Young and Oldacre). Targeting a ligand-to-metal rather than metal-to-ligand charge-transfer state was key to the achievement, as was the octahedral coordination environment rigidly enforced by two tridentate carbene ligands. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6424" page="249" related-article-type="in-this-issue" vol="363" xlink:href="10.1126/science.aau7160">249</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6424" page="225" related-article-type="in-this-issue" vol="363" xlink:href="10.1126/science.aav9866">225</jats:related-article> </jats:p>

<jats:title>Impact rates on Earth and the Moon</jats:title> <jats:p> The rate at which impacts produce craters on the Moon is used to calibrate ages in planetary science. Earth should also have received similar numbers of impacts, but many craters have been hidden by erosion, ice sheets, and so on. Mazrouei <jats:italic>et al.</jats:italic> used infrared images of the Moon to estimate the ages of young lunar craters (see the Perspective by Koeberl). They found that the impact rate increased within the past ∼500 million years, a conclusion strengthened by an analysis of known impact craters on Earth. Crater size distributions are the same on Earth and the Moon over this period, implying that terrestrial erosion affects all craters equally, regardless of their size. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6424" page="253" related-article-type="in-this-issue" vol="363" xlink:href="10.1126/science.aar4058">253</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6424" page="224" related-article-type="in-this-issue" vol="363" xlink:href="10.1126/science.aav8480">224</jats:related-article> </jats:p>