Beyond artificial photosynthesis: general discussion.
Beyond artificial photosynthesis: general discussion.
复制标题
超越人工光合作用：一般性讨论。
DOI：
10.1039/c9fd90022e
复制
发表时间：
2019
影响因子：
3.4
通讯作者：
Abe R
中科院分区：
文献类型：
--
作者：
Abe R
Christoph Schnedermann对Burkhard König的论文展开了讨论：在更广泛的背景下，希望通过同时优化反应产率和减少所需的光子输入来走向更全面的方法。你能对你在这个反应和相关反应中观察到的量子产率发表评论吗？你可以如何潜在地优化它们？关于的第一个问题，我想知道您是否考虑过从均相光氧化还原催化系统过渡到多相平台，以及您可以预见到在稳定性、反应产率和效率方面存在哪些潜在瓶颈？Burkhard König回答说：光子在光催化有机合成中用作试剂；因此量子产率非常重要。我们还没有确定已报道的反应的量子产率，但确定了许多其他有机转化的量子产率。通常，对于涉及自由基链机制的反应，观察到良好的量子产率，oen远大于1。每个催化循环需要激发的光催化反应通常表现出相当小的量子产率，oen 0.01或更低。许多光子被浪费了，设计更有效地利用光子的光催化系统肯定是未来的挑战。
Christoph Schnedermann opened a discussion of the paper by Burkhard König: In a broader context, it would be desirable to move towards a more holistic approach by simultaneously optimising the reaction yield and reducing the required photon input. Could you comment on the quantum yields you observe in this and related reactions and how you could potentially optimise them? Related to the rst question, I was wondering if you have considered transitioning from a homogeneous photoredox catalytic system towards a heterogeneous platform and what potential bottlenecks you can envision regarding stability, reaction yield and efficiency?Burkhard König replied: Photons are used as a reagent in photocatalytic organic synthesis; the quantum yield is therefore of importance. We have not determined the quantum yield of the reported reaction, but for many other organic transformations. Typically for reactions involving radical chain mechanisms good quantum yields, o en much larger than 1, are observed. Photocatalytic reactions that require excitation for each catalytic cycle typically show rather small quantum yields, o en 0.01 or less. Many photons are wasted and it is certainly a future challenge to design photocatalytic systems that utilize photons more efficiently.