Remote controlled optical manipulation of bimetallic nanoparticle catalysts using peptides
Remote controlled optical manipulation of bimetallic nanoparticle catalysts using peptides
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DOI：
10.1039/d1cy00189b
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发表时间：
2021-04
影响因子：
5
通讯作者：
Randy L. Lawrence;M. Olagunju;Yang Liu;K. Mahalingam;J. Slocik;R. Naik;A. Frenkel;Marc R. Knecht
中科院分区：
文献类型：
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作者：
Randy L. Lawrence;M. Olagunju;Yang Liu;K. Mahalingam;J. Slocik;R. Naik;A. Frenkel;Marc R. Knecht
双金属纳米颗粒仍然是一种有前途的途径，以实现高活性催化剂。在这方面的贡献，我们证明了使用的光开关肽的生产的Pd Au纳米粒子在各种Pd：Au的比例。使用这种肽，生物分子覆盖层结构可以通过光照射在两种不同的构象（顺式与反式）之间切换，从而获得两种不同的表面结构。的组成和安排的材料进行了充分的特点，包括原子水平的分析，之后，使用4-硝基苯酚的还原作为模型系统的反应性的研究材料。使用这些材料，证明了对于以1：3的Pd：Au比率和顺式构象的肽制备的颗粒，反应性最大化。这样的结果提出了新一代的催化剂，可以远程激活的开/关反应作为配体覆盖层构象的函数的路线。
Bimetallic nanoparticles remain a promising avenue to achieve highly reactive catalysts. In this contribution, we demonstrate the use of a photoswitchable peptide for the production of PdAu bimetallic nanoparticles at a variety of Pd : Au ratios. Using this peptide, the biomolecular overlayer structure can be switched between two different conformations (cis vs. trans) via light irradiation, thus accessing two different surface structures. The composition and arrangement of the materials was fully characterized, including atomic-level analyses, after which the reactivity of the bimetallic materials was explored using the reduction of 4-nitrophenol as a model system. Using these materials, it was demonstrated that the reactivity was maximized for the particles prepared at a Pd : Au ratio of 1 : 3 and with the peptide in the cis conformation. Such results present routes to a new generation of catalysts that could be remotely activated for on/off reactivity as a function of the ligand overlayer conformation.