6680期

最新文章

• Near-unity NIR phosphorescent quantum yield from a room-temperature solvated metal nanocluster AI翻译
  作者：Shi, Wan-Qi; Zeng, Linlin; He, Rui-Lin; Han, Xu-Shuang; Guan, Zong-Jie; Zhou, Meng; Wang, Quan-Ming
  作者单位：Tsinghua University; Chinese Academy of Sciences; University of Science & Technology of China, CAS; Hunan University
  摘要：Metal nanoclusters have emerged as promising near-infrared (NIR)-emissive materials, but their room-temperature photoluminescence quantum yield (PLQY), especially in solution, is often low (<10%). We studied the photophysics of Au-22((BuPhC)-Bu-t equivalent to C)(18) (Au-22) and its alloy counterpart Au16Cu6((BuPhC)-Bu-t equivalent to C)(18) (Au16Cu6) (where Bu-t is tert-butyl and Ph is phenyl) and found that copper (Cu) doping suppressed the nonradiative decay (similar to 60-fold less) and pr...
• In Other Journals AI翻译
  作者：Smith, H. Jesse; Ray, L. Bryan; Stern, Peter; Maroso, Mattia; Lavine, Marc S.; Uzogara, Ekeoma; Szuromi, Phil
  摘要：science.ado0308-keyimage.jpg Editors' selections from the current scientific literature
• Mystery in the mass gap AI翻译
  作者：Fishbach, Maya
  作者单位：University of Toronto
  摘要：The identity of a compact astronomical object in the Milky Way is unclear
• Paper trail AI翻译
  作者：Joelving, Frederik
  摘要：In the latest twist of the publishing arms race, firms churning out fake papers have taken to bribing journal editors
• NASA questions space solar power AI翻译
  作者：[Anonymous]
• My lab's lighter footprint AI翻译
  作者：Buchholz, Maj-Britt
  摘要：I went into our lab meeting feeling dejected. For months, I had been trying to recycle some of our lab's plastic waste into 3D-printed lab tools, but it wasn't going well. I've only been able to print three small items, I told my colleagues. They knew how committed I was to reducing the environmental footprint of our research. So one asked, Maybe we should be thinking about how we can avoid having so much plastic waste in the first place? Another chimed in: Could we figure out how much energy ...
• Electrophotocatalytic perfluoroalkylation by LMCT excitation of Ag(II) perfluoroalkyl carboxylates AI翻译
  作者：Campbell, Brandon M.; Gordon, Jesse B.; Raguram, Elaine Reichert; Gonzalez, Miguel I.; Reynolds, Kristopher G.; Nava, Matthew; Nocera, Daniel G.
  作者单位：Harvard University; University of California System; University of California Los Angeles
  摘要：Molecular Ag(II) complexes are superoxidizing photoredox catalysts capable of generating radicals from redox-reticent substrates. In this work, we exploited the electrophilicity of Ag(II) centers in [Ag(bpy)(2)(TFA)][OTf] and Ag(bpy)(TFA)(2) (bpy, 2,2 '-bipyridine; OTf, CF3SO3-) complexes to activate trifluoroacetate (TFA) by visible light-induced homolysis. The resulting trifluoromethyl radicals may react with a variety of arenes to forge C(sp(2))-CF3 bonds. This methodology is general and ex...
• SCIENTIFIC COMMUNITY Uprooted Ukrainian academics reboot in exile AI翻译
  作者：Stone, Richard
  摘要：Many institutions and scientists displaced from occupied territories may never return
• 'Lobster eye' in space promises new look at x-rays AI翻译
  作者：[Anonymous]
• A pulsar in a binary with a compact object in the mass gap between neutron stars and black holes AI翻译
  作者：Barr, Ewan D.; Dutta, Arunima; Freire, Paulo C. C.; Cadelano, Mario; Gautam, Tasha; Kramer, Michael; Pallanca, Cristina; Ransom, Scott M.; Ridolfi, Alessandro; Stappers, Benjamin W.; Tauris, Thomas M.; Venkatraman Krishnan, Vivek; Wex, Norbert; Bailes, Matthew; Behrend, Jan; Buchner, Sarah; Burgay, Marta; Chen, Weiwei; Champion, David J.; Chen, C. -H. Rosie; Corongiu, Alessandro; Geyer, Marisa; Men, Y. P.; Padmanabh, Prajwal Voraganti; Possenti, Andrea
  作者单位：Max Planck Society; University of Bologna; Istituto Nazionale Astrofisica (INAF); National Radio Astronomy Observatory (NRAO); Istituto Nazionale Astrofisica (INAF); University of Manchester; Jodrell Bank Centre for Astrophysics; Aalborg University; Swinburne University of Technology; Swinburne University of Technology; University of Cape Town; Max Planck Society; Leibniz University Hannover
  摘要：Some compact objects observed in gravitational wave events have masses in the gap between known neutron stars (NSs) and black holes (BHs). The nature of these mass gap objects is unknown, as is the formation of their host binary systems. We report pulsar timing observations made with the Karoo Array Telescope (MeerKAT) of PSR J0514-4002E, an eccentric binary millisecond pulsar in the globular cluster NGC 1851. We found a total binary mass of 3.887 +/- 0.004 solar masses (M-circle dot), and mul...