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The Z-Scheme of Electron Transport in Photosynthesis01:34

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The light reactions of photosynthesis assume a linear flow of electrons from water to NADP+. During this process, light energy drives the splitting of water molecules to produce oxygen. However, oxidation of water molecules is a thermodynamically unfavorable reaction and requires a strong oxidizing agent. This is accomplished by the first product of light reactions: oxidized P680 (or P680+), the most powerful oxidizing agent known in biology. The oxidized P680 that acquires an electron from the...
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  3. 酶和光敏剂的集成在一个层次化的中孔金属有机框架中,用于光驱 Co2 的减少
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  3. 酶和光敏剂的集成在一个层次化的中孔金属有机框架中,用于光驱 Co2 的减少

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酶和光敏剂的集成在一个层次化的中孔金属有机框架中,用于光驱 CO2 的减少

Yijing Chen1,2, Peng Li1,2, Jiawang Zhou1

  • 1Department of Chemistry , Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208-3113 , United States.

Journal of the American Chemical Society
|January 14, 2020

在PubMed 上查看摘要

概括
此摘要是机器生成的。

科学家开发了一种半人工系统, 使用固定酶和采光材料, 用白光将二氧化碳转化为酸, 提供新的太阳能驱动的碳固定途径.

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科学领域:

  • 生物技术
  • 材料科学
  • 可再生能源

背景情况:

  • 在非原生环境中的酶稳定对于生物催化非常重要.
  • 合成支物和封装增强了酶的稳定性和反应性.
  • 连锁反应对于光驱二氧化碳减排等过程至关重要.

研究的目的:

  • 使用白光将二氧化碳转化为酸的半人工系统.
  • 在采光支架内使用固定酶,以有效地转化太阳能.
  • 展示一个可行的太阳能碳固化的途径.

主要方法:

  • 在采光支架中固定甲酸脱酶.
  • 一个电子介质Cp*Rh{2,2'-二基-5,5'-二酸) Cl的定在金属有机框架NU-1006上.
  • 用白光照射以诱导光诱导的电子转移和辅酶减少.

主要成果:

  • 通过固定电子介质促进的超快的光诱导电子转移.
  • 尼古丁胺氨基二核酸 (共酶) 的有效降低速度约为28mM·h-1.
  • 通过固定酶从二氧化碳中选择性产生酸,在24小时内大约有865小时-1的高循环频率.

结论:

  • 开发的半人工系统证明了太阳能碳固化的可行途径.
  • 在采光支架中的酶固定增强了二氧化碳转换的催化效率.
  • 这项研究为通过人工光合作用产生替代能源提供了有希望的途径.