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Structural diversity in metal-organic nanoparticles based on iron isopropoxide treated lignin

机译：基于铁异丙氧化物处理木质素的金属 - 有机纳米粒子的结构多样性

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摘要

The magnetic nature of iron-containing nanoparticles enables multiple high-end applications. Metal alkoxides are a highly reactive chemical species, which are widely used in ceramics and sol-gel manufacture. However, their use with organic molecules has been mostly limited to catalytic purposes due to their highly reactive nature. Lignin is the second most abundant biopolymer in the world-rich in OH groups and amenable to highly stable colloid nanoparticle formation by a simple solvent exchange process. Here we show that the reaction between iron isopropoxide and lignin in tetrahydrofuran (THF) solution produces metal-organic nanoparticles with tunable morphologies, ranging from hollow and solid nanospheres to open network structures. The immediate condensation reaction between lignin and iron isopropoxide as well as the resulting structure morphology can be controlled by varying the reaction parameters. Despite iron isopropoxide being highly water sensitive, the formed structures are stable as water suspensions. Our results demonstrate that solution processable metal-organic nanoparticles can be easily produced with macromolecular polyols in an inert solvent, such as THF. This presents a facile method of obtaining various metal-organic nanomaterials, with a wide range of metal alkoxides and organic polyols to choose from. We anticipate that metal-bioorganic sol-gel reactions will produce biocompatible materials with enhanced functionality, such as magnetic, antibacterial and catalytic properties depending on the chosen metal and polyol.
机译：含铁纳米颗粒的磁性使得能够多个高端应用。金属醇盐是一种高反应性的化学物质，广泛用于陶瓷和溶胶 - 凝胶制造。然而，由于其高度反应性，它们与有机分子的用途主要限于催化目的。木质素是世界上富含世界的第二种最丰富的生物聚合物，并通过简单的溶剂交换过程可用于高度稳定的胶体纳米粒子形成。在这里，我们表明铁异丙氧化物和木质素中的反应在四氢呋喃（THF）溶液中产生具有可调谐形态的金属 - 有机纳米颗粒，其范围从中空和固体纳米球打开网络结构。通过改变反应参数，可以控制木质素和铁异丙氧化物之间的直接缩合反应以及所得的结构形态。尽管铁异丙氧化物高度水敏感，但形成的结构稳定为水悬浮液。我们的结果表明，溶液可加工金属 - 有机纳米颗粒可以用惰性溶剂中的大分子多元醇容易地生产，例如THF。这提出了一种获得各种金属 - 有机纳米材料的容易方法，具有各种金属醇盐和有机多元醇可供选择。我们预期金属 - 生物无机溶胶 - 凝胶反应将产生具有增强功能的生物相容性材料，例如磁性，抗菌和催化性质，这取决于所选择的金属和多元醇。

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  • 来源
    《RSC Advances》 |2016年第38期|共7页
  • 作者

    Lintinen Kalle; Latikka Mika; Sipponen Mika Henrikki; Ras Robin H. A.; Osterberg Monika; Kostiainen Mauri A.;

  • 作者单位

    Aalto Univ Dept Biotechnol &

    Chem Technol Biohybrid Mat Aalto 00076 Finland;

    Aalto Univ Dept Appl Phys Mol Mat Aalto 00076 Finland;

    Aalto Univ Dept Biotechnol &

    Chem Technol Aalto 00076 Finland;

    Aalto Univ Dept Appl Phys Mol Mat Aalto 00076 Finland;

    Aalto Univ Dept Forest Prod Technol Aalto 00076 Finland;

    Aalto Univ Dept Biotechnol &

    Chem Technol Biohybrid Mat Aalto 00076 Finland;

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  • 正文语种 eng
  • 中图分类 化学;
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