化学生产材料的机械和光活化

IF 26.8 1区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Luka Đorđević, Tyler J. Jaynes, Hiroaki Sai, Marianna Barbieri, Jacob E. Kupferberg, Nicholas A. Sather, Steven Weigand, Samuel I. Stupp
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引用次数: 0

摘要

在光合作用生物中,气孔的机械膨胀和收缩调节了一系列的过程,这些过程是管理光吸收、控制气体交换和调节水分流失所必需的。这些被称为气孔的气孔,通过主动改变气孔开口的大小,使植物能够根据光照强度、湿度和温度等环境条件最大化地进行光合作用。尽管人工光合系统取得了进步,但人们对发生化学反应的合成材料中这种机械驱动的影响知之甚少。本文报道了一种混合水凝胶,它将光活化的超分子聚合物与共价聚合物的热机械驱动相结合,用于超氧化物的生产。超氧化物的生产在有机合成和环境修复中具有重要意义,是过氧化氢液体燃料的潜在前体。结果表明,杂化水凝胶中孔隙的闭合导致光催化活性的显著降低,而膨胀和收缩状态的循环则增强了光催化活性。这些观察激发了集成大规模运动和化学反应的仿生光合材料的发展。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Mechanical and Light Activation of Materials for Chemical Production

Mechanical and Light Activation of Materials for Chemical Production

Mechanical and Light Activation of Materials for Chemical Production

Mechanical and Light Activation of Materials for Chemical Production

Mechanical and Light Activation of Materials for Chemical Production

Mechanical expansion and contraction of pores within photosynthetic organisms regulate a series of processes that are necessary to manage light absorption, control gas exchange, and regulate water loss. These pores, known as stoma, allow the plant to maximize photosynthetic output depending on environmental conditions such as light intensity, humidity, and temperature by actively changing the size of the stomal opening. Despite advances in artificial photosynthetic systems, little is known about the effect of such mechanical actuation in synthetic materials where chemical reactions occur. It is reported here on a hybrid hydrogel that combines light-activated supramolecular polymers for superoxide production with thermal mechanical actuation of a covalent polymer. Superoxide production is important in organic synthesis and environmental remediation, and is a potential precursor to hydrogen peroxide liquid fuel. It is shown that the closing of pores in the hybrid hydrogel results in a substantial decrease in photocatalysis, but cycles of swollen and contracted states enhance photocatalysis. The observations motivate the development of biomimetic photosynthetic materials that integrate large scale motion and chemical reactions.

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来源期刊
Advanced Materials
Advanced Materials 工程技术-材料科学:综合
CiteScore
43.00
自引率
4.10%
发文量
2182
审稿时长
2 months
期刊介绍: Advanced Materials, one of the world's most prestigious journals and the foundation of the Advanced portfolio, is the home of choice for best-in-class materials science for more than 30 years. Following this fast-growing and interdisciplinary field, we are considering and publishing the most important discoveries on any and all materials from materials scientists, chemists, physicists, engineers as well as health and life scientists and bringing you the latest results and trends in modern materials-related research every week.
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