Size-Dependent Properties of Solution-Processable Conductive MOF Nanocrystals
Size-Dependent Properties of Solution-Processable Conductive MOF Nanocrystals
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DOI：
10.1021/jacs.1c10800
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发表时间：
2022-04-06
影响因子：
15
通讯作者：
Brozek, Carl K.
中科院分区：
文献类型：
--
作者：
Marshall, Checkers R.;Dvorak, Josh P.;Brozek, Carl K.
大多数胶体半导体纳米晶体的各种光学、磁性和电子行为来自结构和元素成分有限的材料。导电金属有机框架（mof）具有丰富的成分和复杂的结构，但作为纳米晶体仍未被探索，阻碍了它们与可扩展器件的结合。本文报道了基于铁（1,2,3-三唑酸盐）2的导电MOF纳米颗粒的可控合成。尺寸可以调整到小到5.5纳米，确保无限的胶体稳定性。这些可溶液加工的mof可以通过溶液态光谱和电化学来分析，并可以铸造成具有优异均匀性的导电薄膜。这一前所未有的MOF材料分析揭示了MOF材料的光学和电子行为对其固有孔隙率和主客体相互作用的敏感性具有很强的尺寸依赖性。这些结果与典型的MOF表征完全不同，使人们能够深入了解本体类似物无法实现的物理特性，同时为MOF纳米颗粒合成和器件制造的未来提供了路线图
The diverse optical, magnetic, and electronic behaviors of most colloidal semiconductor nanocrystals emerge from materials with limited structural and elemental compositions. Conductive metal-organic frameworks (MOFs) possess rich compositions with complex architectures but remain unexplored as nanocrystals, hindering their incorporation intoscalable devices. Here, we report the controllable synthesis of conductive MOF nanoparticles based on Fe(1,2,3-triazolate)2. Sizes can be tuned to as small as 5.5 nm, ensuring indefinite colloidal stability. These solution-processable MOFs can be analyzed by solution-state spectroscopy and electrochemistry and cast into conductive thin films with excellent uniformity. This unprecedented analysis of MOF materials reveals a strong size dependence in optical and electronic behaviors sensitive to the intrinsic porosity and guest-host interactions of MOFs. These results provide a radical departure from typical MOF characterization, enabling insights into physical properties otherwise impossible with bulk analogues while offering a roadmap for the future of MOF nanoparticle synthesis and device fabrication