当前位置: X-MOL 学术Science › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Iron hits the mark
Science ( IF 56.9 ) Pub Date : 2019-01-17 , DOI: 10.1126/science.aav9866
Elizabeth R. Young 1 , Amanda Oldacre 1
Affiliation  

Strongly electron-donating ligands enable nanosecond lifetimes of iron(III) photoexcited states Solar energy can enable our society to thrive as we endeavor to reduce our dependence on fossil fuels. However, the Sun is an intermittent form of energy. Solar-cell technology is well suited for daytime electricity generation and usage, but our society uses energy around the clock. Thus, it is not only important to generate electricity for daytime use but also to store solar energy for nighttime use. Chemists see huge potential in molecules and materials that absorb light (that is, solar energy) and use that energy to generate electrons that then carry out chemical reactions to turn low-energy feedstocks into high-energy fuels. To date, the transition metal complex (TMC) photosensitzers that have sufficiently long excited-state lifetimes to enable this chemistry (1) contain expensive and scarce metals, such as complexes of ruthenium (Ru), osmium, and iridium. On page 249 of this issue, Kjær et al. (2) report an iron (Fe)–based photosensitizer with a quantum efficiency surpassing that of [Ru(bpy)3]2+ (where bpy is 2,2′-bipyridine), the historical standard bearer. Furthermore, the new iron-based photosensitizer has an excited-state lifetime of 2 ns, which is sufficiently long to transfer electrons to other compounds (see the figure).

中文翻译:

铁击中目标

强给电子配体使铁 (​​III) 光激发态的寿命达到纳秒级 太阳能可以使我们的社会蓬勃发展,因为我们努力减少对化石燃料的依赖。然而,太阳是一种间歇性的能量形式。太阳能电池技术非常适合白天发电和使用,但我们的社会全天候使用能源。因此,不仅要发电供白天使用,而且要储存太阳能供夜间使用,这一点很重要。化学家们看到了分子和材料的巨大潜力,它们吸收光(即太阳能)并利用这些能量产生电子,然后进行化学反应,将低能原料转化为高能燃料。迄今为止,过渡金属配合物 (TMC) 光敏剂具有足够长的激发态寿命以实现这种化学反应 (1) 包含昂贵且稀有的金属,例如钌 (Ru)、锇和铱的配合物。在本期第 249 页上,Kjær 等人。(2) 报告了一种基于铁 (Fe) 的光敏剂,其量子效率超过了历史标准载体 [Ru(bpy)3]2+(其中 bpy 是 2,2'-联吡啶)。此外,新的铁基光敏剂的激发态寿命为 2 ns,足以将电子转移到其他化合物(见图)。(2) 报告了一种基于铁 (Fe) 的光敏剂,其量子效率超过了历史标准载体 [Ru(bpy)3]2+(其中 bpy 是 2,2'-联吡啶)。此外,新的铁基光敏剂的激发态寿命为 2 ns,足以将电子转移到其他化合物(见图)。(2) 报告了一种基于铁 (Fe) 的光敏剂,其量子效率超过了历史标准载体 [Ru(bpy)3]2+(其中 bpy 是 2,2'-联吡啶)。此外,新的铁基光敏剂的激发态寿命为 2 ns,足以将电子转移到其他化合物(见图)。
更新日期:2019-01-17
down
wechat
bug