Controlling the alignment of 1D nanochannel arrays in oriented metal–organic framework films for host–guest materials design,Chemical Science

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Controlling the alignment of 1D nanochannel arrays in oriented metal–organic framework films for host–guest materials design
Chemical Science ( IF 7.6 ) Pub Date : 2020-07-14 , DOI: 10.1039/d0sc02958k
Kenji Okada _{1,

2} , Miharu Nakanishi ₁ , Ken Ikigaki ₁ , Yasuaki Tokudome ₁ , Paolo Falcaro ₃ , Christian J Doonan ₄ , Masahide Takahashi ₁

Affiliation

Controlling the direction of molecular-scale pores enables the accommodation of guest molecular-scale species with alignment in the desired direction, allowing for the development of high-performance mechanical, thermal, electronic, photonic and biomedical organic devices (host–guest approach). Regularly ordered 1D nanochannels of metal–organic frameworks (MOFs) have been demonstrated as superior hosts for aligning functional molecules and polymers. However, controlling the orientation of MOF films with 1D nanochannels at commercially relevant scales remains a significant challenge. Here, we report the fabrication of macroscopically oriented films of Cu-based pillar-layered MOFs having regularly ordered 1D nanochannels. The direction of 1D nanochannels is controllable by optimizing the crystal growth process; 1D nanochannels align either perpendicular or parallel to substrates, offering molecular-scale pore arrays for a macroscopic alignment of functional guest molecules in the desired direction. Due to the fundamental interest and widespread technological importance of controlling the alignment of functional molecules and polymers in a particular direction, orientation-controllable MOF films will open up the possibility of realising the potential of MOFs in advanced technologies.

中文翻译：

控制定向金属有机框架薄膜中一维纳米通道阵列的排列，用于主客体材料设计

控制分子级孔隙的方向可以容纳客体分子级物种，并按所需方向排列，从而可以开发高性能机械、热、电子、光子和生物医学有机器件（主客体方法）。规则有序的一维金属有机框架（MOF）纳米通道已被证明是排列功能分子和聚合物的优异主体。然而，在商业相关规模上控制具有一维纳米通道的 MOF 薄膜的取向仍然是一个重大挑战。在这里，我们报道了具有规则有序的一维纳米通道的铜基柱状层状 MOF 的宏观取向薄膜的制造。通过优化晶体生长过程可以控制一维纳米通道的方向；一维纳米通道垂直或平行于基底排列，提供分子级孔阵列，用于功能性客体分子在所需方向上的宏观排列。由于控制功能分子和聚合物在特定方向上的排列的根本利益和广泛的技术重要性，取向可控的 MOF 薄膜将为实现 MOF 在先进技术中的潜力提供可能性。

更新日期：2020-08-05

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