Department of Chemistry, Texas A&M University, College Station, Texas 77842-3012, United States.
J Am Chem Soc. 2012 Sep 26;134(38):15923-8. doi: 10.1021/ja3063925. Epub 2012 Sep 11.
Metal-organic polyhedra (MOPs) have been incorporated into silica nanopores for the first time. Three MOPs with identical geometries but different ligand functionality (namely tert-butyl, hydroxyl, and sulfonic groups) were employed. A typical mesoporous silica, SBA-15, with a two-dimensional hexagonal pore regularity was used as the host. In comparison with bulk MOPs, which prefer to aggregate, MOPs confined in silica nanopores can be well dispersed, making the active sites and pores in the MOPs accessible. These dispersed MOPs showed apparently superior H(2) adsorption capacity in comparison with aggregated bulk MOPs. Moreover, the thermal stability of the MOPs was enhanced upon their confinement in silica nanopores.
金属-有机多面体（MOPs）首次被引入到硅纳米孔中。使用了三种具有相同几何形状但配体功能不同的 MOP（叔丁基、羟基和磺酸基）。一种典型的介孔硅 SBA-15，具有二维六方孔规整性，被用作主体。与倾向于聚集的体相 MOP 相比，限域在硅纳米孔中的 MOP 可以很好地分散，使 MOP 中的活性位点和孔道易于接近。与聚集的体相 MOP 相比，这些分散的 MOP 表现出明显优越的 H2 吸附能力。此外，MOP 在硅纳米孔中的限域作用提高了其热稳定性。
