Department of Nanosystem Science, Graduate School of Nanobioscience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama, Kanagawa 236-0027, Japan.
J Am Chem Soc. 2010 Mar 10;132(9):2862-3. doi: 10.1021/ja910492d.
Development of gas separation materials has been one of the basic requirements of industry. Microporous materials have adequate pores for gas separation and have contributed to the advancement of gas purification techniques. Because the simplest and most economical method would be membrane separation, various microporous membranes have been prepared and explored for their separation properties. However, a key issue remains as to how to generate defect-free membranes with practical gas permeance. Here we report the preparation of a well-oriented single-crystal membrane with high permeance by using a flexible single crystal of Cu(2)(bza)(4)(pyz) possessing one-dimensional (1D) penetration channels; this membrane exhibits anisotropic gas permeation through the 1D channels with high permselectivity for H(2) and CO(2). Although the diameter of the neck of the narrow channels is smaller than the kinetic diameters of the sample gases, various gases pass through the 1D channels. This report provides a new way of developing gas permeation membranes as sophisticated crystal devices for gas purification techniques.
气体分离材料的开发一直是工业的基本要求之一。微孔材料具有足够的气体分离孔隙，为气体净化技术的进步做出了贡献。由于最简单和最经济的方法将是膜分离，因此已经制备了各种微孔膜并探索了它们的分离性能。然而，如何生成具有实际气体透过率的无缺陷膜仍然是一个关键问题。在这里，我们报告了通过使用具有一维（1D）穿透通道的柔性单晶Cu(2)(bza)(4)(pyz)来制备具有高通量的取向单晶膜；该膜通过具有高 H(2)和 CO(2)选择渗透性的 1D 通道表现出各向异性的气体渗透。尽管窄通道的颈部直径小于样品气体的动力学直径，但各种气体都可以通过 1D 通道。本报告为开发气体渗透膜作为气体净化技术的复杂晶体装置提供了一种新方法。
