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首页> 外文期刊>Journal of Applied Polymer Science >Polyelectrolytes with tetrazole pendant groups useful in the stabilization of Au and Ag nanoparticles
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Polyelectrolytes with tetrazole pendant groups useful in the stabilization of Au and Ag nanoparticles

机译：具有四唑侧基的聚电解质可用于稳定Au和Ag纳米颗粒

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摘要

Stabilization of metallic nanoparticles is a challenge of enormous dimensions because the nanosize nanoparticles are not stable by themselves and therefore they tend to coalesce, forming large agglomerates causing the loss of the properties of individual nanoparticles. In this work, we report the synthesis of polyelectrolytes with tetrazole groups useful as stabilizing agents of Au and Ag nanoparticles. The polyelectrolytes with tetrazole groups were synthetized from the appropriate starting materials with nitrile groups, which were successfully converted to the corresponding 1H-tetrazole rings using 1,3-dipolar cycloaddition with ammonium azide. These new materials were characterized by NMR and FT-IR techniques and they were used for the stabilization of Au and Ag colloidal nanoparticles at room temperature, using sodium borohydride as reducing agent. Formation and stabilization processes of the nanoparticles were monitored by UV-vis spectroscopy. Shape and size of nanoparticles were studied by TEM. The polyelectrolytes with tetrazole pendant group are suitable materials for synthesis and stabilization of gold nanoparticles, obtaining average sizes lower than 10 nm. (C) 2016 Wiley Periodicals, Inc.
机译：金属纳米颗粒的稳定化是一个巨大的挑战，因为纳米尺寸的纳米颗粒本身并不稳定，因此它们趋于聚结，形成大的团聚体，从而导致单个纳米颗粒的性能下降。在这项工作中，我们报告了具有四唑基团的聚电解质的合成，该四唑基可用作Au和Ag纳米粒子的稳定剂。由具有腈基的合适的起始原料合成具有四唑基的聚电解质，然后使用叠氮化铵的1，3-偶极环加成将其成功转化为相应的1H-四唑环。这些新材料通过NMR和FT-IR技术进行表征，并使用硼氢化钠作为还原剂，在室温下用于稳定Au和Ag胶体纳米颗粒。纳米颗粒的形成和稳定过程通过紫外可见光谱法进行监测。通过TEM研究了纳米颗粒的形状和大小。具有四唑侧基的聚电解质是用于合成和稳定金纳米颗粒的合适材料，其平均尺寸小于10 nm。 （C）2016威利期刊公司

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