Confinement of Metal鈥揙rganic Polyhedra in Silica Nanopores

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• 作者：Lin-Bing Sun ; Jian-Rong Li ; Weigang Lu ; Zhi-Yuan Gu ; Zhiping Luo ; Hong-Cai Zhou
• 刊名：The Journal of the American Chemical Society
• 出版年：2012
• 出版时间：September 26, 2012
• 年：2012
• 卷：134
• 期：38
• 页码：15923-15928
• 全文大小：356K
• 年卷期：v.134,no.38(September 26, 2012)
• ISSN：1520-5126

文摘

Metal鈥搊rganic 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 H₂ adsorption capacity in comparison with aggregated bulk MOPs. Moreover, the thermal stability of the MOPs was enhanced upon their confinement in silica nanopores.