Chae Hee K, Siberio-Pérez Diana Y, Kim Jaheon, Go YongBok, Eddaoudi Mohamed, Matzger Adam J, O'Keeffe Michael, Yaghi Omar M
Materials Design and Discovery Group, Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, USA.
Nature. 2004 Feb 5;427(6974):523-7. doi: 10.1038/nature02311.
One of the outstanding challenges in the field of porous materials is the design and synthesis of chemical structures with exceptionally high surface areas. Such materials are of critical importance to many applications involving catalysis, separation and gas storage. The claim for the highest surface area of a disordered structure is for carbon, at 2,030 m2 g(-1) (ref. 2). Until recently, the largest surface area of an ordered structure was that of zeolite Y, recorded at 904 m2 g(-1) (ref. 3). But with the introduction of metal-organic framework materials, this has been exceeded, with values up to 3,000 m2 g(-1) (refs 4-7). Despite this, no method of determining the upper limit in surface area for a material has yet been found. Here we present a general strategy that has allowed us to realize a structure having by far the highest surface area reported to date. We report the design, synthesis and properties of crystalline Zn4O(1,3,5-benzenetribenzoate)2, a new metal-organic framework with a surface area estimated at 4,500 m2 g(-1). This framework, which we name MOF-177, combines this exceptional level of surface area with an ordered structure that has extra-large pores capable of binding polycyclic organic guest molecules--attributes not previously combined in one material.
多孔材料领域的突出挑战之一是设计和合成具有超高表面积的化学结构。这类材料对于许多涉及催化、分离和气体储存的应用至关重要。无序结构中表面积最大的是碳，为2030 m² g⁻¹（参考文献2）。直到最近，有序结构中最大的表面积是沸石Y的，记录为904 m² g⁻¹（参考文献3）。但随着金属有机骨架材料的引入，这一数值已被超越，高达3000 m² g⁻¹（参考文献4 - 7）。尽管如此，尚未找到确定材料表面积上限的方法。在此，我们提出一种通用策略，使我们能够实现一种迄今为止报道的表面积最高的结构。我们报告了晶体Zn₄O(1,3,5 - 苯三苯甲酸酯)₂的设计、合成及性质，这是一种新的金属有机骨架，其表面积估计为4500 m² g⁻¹。我们将这种骨架命名为MOF - 177，它将这种超高的表面积与一种有序结构相结合，该结构具有能够结合多环有机客体分子的超大孔隙——这些特性以前未曾在一种材料中同时具备。
