Highly controlled acetylene accommodation in a metal-organic microporous material
Highly controlled acetylene accommodation in a metal-organic microporous material
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DOI：
10.1038/nature03852
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发表时间：
2005-07-14
期刊：
影响因子：
64.8
通讯作者：
Mita, Y
中科院分区：
文献类型：
--
作者：
Matsuda, R;Kitaura, R;Mita, Y
金属-有机微孔材料（1-4）（M0 M）由于其不寻常的结构和性质而引起了广泛的科学关注，并且由于其在储存（5-9）、分离（10，11）和多相催化（12，13）中的潜在应用而引起了商业兴趣。与其它微孔材料如活性炭相比，MOM的优点之一是，由于有机官能团受控地结合到孔壁中，它们能够表现出各种孔表面性质，如亲水性和手性（11，13 -15）。这种能力意味着MOMs的孔表面可以被设计为吸附特定的分子;但是到目前为止，很少有用于吸附小分子的设计策略。在这里，我们报告了高水平的选择性吸附乙炔分子相比，一个非常相似的分子，二氧化碳，到功能化的表面的乙炔。乙炔分子通过纳米级孔壁中的两个非配位氧原子与乙炔分子的两个氢原子之间的氢键相互保持周期性距离。这允许乙炔在室温下以200倍于自由乙炔的安全压缩极限的密度稳定储存。
Metal - organic microporous materials(1-4) (MOMs) have attracted wide scientific attention owing to their unusual structure and properties, as well as commercial interest due to their potential applications in storage(5-9), separation(10,11) and heterogeneous catalysis(12,13). One of the advantages of MOMs compared to other microporous materials, such as activated carbons, is their ability to exhibit a variety of pore surface properties such as hydrophilicity and chirality, as a result of the controlled incorporation of organic functional groups into the pore walls(11,13-15). This capability means that the pore surfaces of MOMs could be designed to adsorb specific molecules; but few design strategies for the adsorption of small molecules have been established so far. Here we report high levels of selective sorption of acetylene molecules as compared to a very similar molecule, carbon dioxide, onto the functionalized surface of a MOM. The acetylene molecules are held at a periodic distance from one another by hydrogen bonding between two non-coordinated oxygen atoms in the nanoscale pore wall of the MOM and the two hydrogen atoms of the acetylene molecule. This permits the stable storage of acetylene at a density 200 times the safe compression limit of free acetylene at room temperature.