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Permanganate-based synthesis of manganese oxide nanoparticles in ferritin

机译：铁锰基锰氧化锰纳米粒子的合成

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This paper investigates the comproportionation reaction of Mn-II with MnO4- as a route for manganese oxide nanoparticle synthesis in the protein ferritin. We report that MnO4- serves as the electron acceptor and reacts with Mn-II in the presence of apoferritin to form manganese oxide cores inside the protein shell. Manganese loading into ferritin was studied under acidic, neutral, and basic conditions and the ratios of Mn-II and permanganate were varied at each pH. The manganese-containing ferritin samples were characterized by transmission electron microscopy, UV/Vis absorption, and by measuring the band gap energies for each sample. Manganese cores were deposited inside ferritin under both the acidic and basic conditions. All resulting manganese ferritin samples were found to be indirect band gap materials with band gap energies ranging from 1.01 to 1.34 eV. An increased UV/Vis absorption around 370 nm was observed for samples formed under acidic conditions, suggestive of MnO2 formation inside ferritin.
机译：本文研究了Mn-II与MnO4-作为蛋白铁蛋白中氧化锰纳米粒子合成的途径的常量反应。我们认为MnO 4 - 用作电子受体，并在Apoferrin存在下与Mn-II反应，以在蛋白质壳内形成氧化锰芯。在酸性，中性和基本条件下研究了锰装入铁蛋白，并且在每pH下变化Mn-II和高锰酸盐的比例。通过透射电子显微镜，UV / Vis吸收和测量每个样品的带隙能量，表征含锰的铁蛋白样品。在酸性和碱性条件下沉积锰芯的内部铁蛋白。发现所有得到的锰铁蛋白样品都被发现是间接带隙材料，带隙能量为1.01至1.34eV。对于在酸性条件下形成的样品，观察到增加的UV / Vis吸收增加约370nm，旨在在铁蛋白内部的MnO 2形成。

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