Microscopic Mechanism for Precise Control of the Sizes of Molybdenum Blue Nanorings

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2024-11-27 DOI:10.1021/acs.nanolett.4c05095

Mu Li, Binghui Xue, Panchao Yin

引用次数: 0

Abstract

Molybdenum blue (MB) nanorings with monodispersed, well-defined structures can be feasibly prepared via treatment of molybdate solutions with reducing agents at acidic conditions. However, the hidden constraints that control their ring sizes have been unknown for decades. Herein, the formation of 3.4 and 4.1 nm nanorings, {Mo₁₅₄} and {Mo₁₇₆}, is monitored using small-angle X-ray scattering (SAXS) with systematically varied synthetic conditions. Results suggest that {Mo₁₅₄} forms quickly in solution and then undergoes slow transformation into {Mo₁₇₆} when reducing agents are used, while {Mo₁₇₆} can form directly with MoCl₅ supplied as reduced Mo^V. These are attributed to {Mo₁₅₄} being the kinetic product catalyzed by the template-effect while {Mo₁₇₆} is the thermodynamic product due to its low ring tension. Our findings unravel one of the long-standing mysteries in MB and point out effective routes for the precise synthesis of nanorings.

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精确控制蓝钼纳米尺寸的微观机制

通过在酸性条件下用还原剂处理钼酸盐溶液，可以制备出具有单分散、明确结构的钼蓝（MB）纳米环。然而，几十年来，控制其环尺寸的隐性约束条件一直不为人知。本文利用小角 X 射线散射（SAXS）系统地改变合成条件，监测了 3.4 和 4.1 nm 纳米环 {Mo154} 和 {Mo176} 的形成。结果表明，{Mo154}在溶液中迅速形成，然后在使用还原剂时缓慢转化为{Mo176}，而{Mo176}则可以直接与作为还原MoV提供的MoCl5形成。这是因为{Mo154}是由模板效应催化的动力学产物，而{Mo176}则由于其低环张力而成为热力学产物。我们的发现揭开了甲基溴中一个长期存在的谜团，并指出了精确合成纳米环的有效途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

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.