具有手性连续性的聚苯胺纳米螺旋的精确控制及其与催化性能的相关性。

IF 9.6 1区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Pengyuan Hang, Jiangbo Tong, Zheng Xi, Shixin Li, Shengyang Tao, Xiaohuan Sun, Jie Han
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引用次数: 0

摘要

左手和右手手性分子诱导剂经常被用来引导形成具有二元手性形状的手性纳米材料。然而,手性纳米材料从离散到连续可调手性形状的转变势在必行,但也极具挑战性,这将有助于深入理解手性纳米结构及其化学性质之间的基本关系。本研究表明,通过调整用作手性分子诱导剂的 S/R 樟脑磺酸的对映体过量,可以制备出具有相似长宽比(∼5.0)但螺距(293 至 ∞ nm)和倾斜角(33° 至 0°)连续可调的手性聚苯胺纳米螺旋(PANI NHs)。在手性 PANI NHs 表面负载金纳米粒子后,研究了 PANI-Au NHs 在还原、氧化和对映体选择性催化反应中的手性形态依赖性催化性能,结果表明螺旋扭曲度越大,PANI-Au NHs 的催化活性和对映体选择性越高。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Precise Control of Polyaniline Nanohelices with Chirality Continuum and Their Correlation on Catalytic Performance.

Precise Control of Polyaniline Nanohelices with Chirality Continuum and Their Correlation on Catalytic Performance.

Left- and right-handed chiral molecule inducers have been frequently used to guide the formation of chiral nanomaterials with binary chiral shapes. However, the transition of chiral nanomaterials from discrete to continuously tunable chiral shapes is imperative but challenging and will contribute to a deep understanding of the fundamental relations between chiral nanostructures and their chemical properties. This study shows that chiral polyaniline nanohelices (PANI NHs) with similar aspect ratios (∼5.0) but continuously tunable screw pitches (293 to ∞ nm) and tilt angles (33° to 0°) can be fabricated by adjusting the enantiomer excess of S/R-camphorsulfonic acid used as a chiral molecule inducer. After Au nanoparticles were loaded on the surface of chiral PANI NHs, the chiral morphology-dependent catalytic performances of PANI-Au NHs are studied in reduction, oxidation, and enantioselective catalytic reactions, showing that the larger the helical twist degree, the higher the catalytic activity and enantioselectivity of PANI-Au NHs.

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来源期刊
Nano Letters
Nano Letters 工程技术-材料科学:综合
CiteScore
16.80
自引率
2.80%
发文量
1182
审稿时长
1.4 months
期刊介绍: Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.
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