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首页> 外文期刊>Crystal growth & design >Shape-Controlled Synthesis of Organometallic Microcrystal-Based Hollow Hexagonal Micromotors through Evaporation-Induced Supramolecular Self-Assembly
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Shape-Controlled Synthesis of Organometallic Microcrystal-Based Hollow Hexagonal Micromotors through Evaporation-Induced Supramolecular Self-Assembly

机译：蒸发诱导的超分子自组装的形状控制合成基于有机金属微晶的空心六边形微电机

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摘要

A facile strategy was developed to fabricate structure controllable microcrystals of ferrocene-based metal organic (Fc-Ala-BCB) materials through evaporation-induced self-assembly. Two distinctive microcrystals, microrods and microtubes had been achieved by tuning the solvents during the self-assemblies. X-ray diffraction analysis was conducted on single crystals to investigate the packing mode of Fc-Ala-BCB molecules, which indicated the two crystals with the hexagonal system. Inheriting the arornaticity and chirality of ferrocenyl and L-Ala, this organic molecule self-assembled into a single helix structure through intermolecule hydrogen bonds and pi-pi stacking. Theoretical analysis and stimulated computations were carried out to compare the surface energies of certain planes. Among those microcrystals, the microrods exhibited a-higher chemical activity in catalyzing the decomposition of H2O2, due to the high-density atomic steps and kinks on the high energy surfaces. However, the hollow hexagonal tubes displayed-appropriate catalytic activity and novel maneuverability toward catalyzing H2O2. The O-2 bubbles accumulated at the inner walls of the microtube were periodically released as individual bubbles, suggesting their potential application as a new kind of microengine (e.g., the microrotor).
机译：开发了一种简便的策略来通过蒸发诱导的自组装来制造二茂铁基金属有机（Fc-Ala-BCB）材料的结构可控的微晶。通过在自组装过程中调节溶剂，获得了两种独特的微晶，微棒和微管。对单晶进行了X射线衍射分析，以研究Fc-Ala-BCB分子的堆积模式，表明这两种晶体具有六方晶系。继承了二茂铁基和L-丙氨酸的芳构性和手性，该有机分子通过分子间氢键和pi-pi堆积自组装成单个螺旋结构。进行了理论分析和受激计算，以比较某些平面的表面能。在那些微晶中，由于高密度原子台阶和高能表面的扭结，微棒在催化H2O2分解中表现出较高的化学活性。然而，空心六边形管显示出适当的催化活性和对H 2 O 2催化的新颖操纵性。累积在微管内壁的O-2气泡会作为单个气泡定期释放，这表明它们有可能作为一种新型的微引擎（例如微转子）应用。

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