Opening of an Accessible Microporosity in an Otherwise Nonporous Metal-Organic Framework by Polymeric Guests
Opening of an Accessible Microporosity in an Otherwise Nonporous Metal-Organic Framework by Polymeric Guests
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DOI：
10.1021/jacs.7b02402
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发表时间：
2017-06-14
影响因子：
15
通讯作者：
Uemura, Takashi
中科院分区：
文献类型：
--
作者：
Le Ouay, Benjamin;Kitagawa, Susumu;Uemura, Takashi
高度多孔的金属有机框架（MOFs）的开发由于其广泛的应用而受到极大的追捧。作为一种替代，开发新的结构，我们建议获得新的稳定配置的柔性MOFs插入聚合物客人。访客阻止了宿主框架的自发关闭，并导致稳定的开放形式。以最大容量的一部分引入，聚合物链导致被占据的纳米通道的开放，并且由于MOF网状刚度，该开放传播到变得可接近的相邻纳米通道，用于吸附。复合材料是通过原位聚合乙烯基单体获得的：纳米通道的其他无孔MOP，导致在均匀加载的材料与孔隙率显着增加（S-BET m（2）/g）;：此外，通过限制可访问的配置为框架和禁止的反应性中间体，聚合物客体防止热降解的主机MOP，即使在非常低的负载（低至100%）。3wt%），并将其稳定域增加超过200 ℃。
The development Of highly porous metal organic frameworks (MOFs) is greatly sought after, due to their wide range of applications. As an alternative to the,development of new structures, we propose to obtain new stable configurations for flexible MOFs by insertion of polymeric guests. The guests prevent the otherwise spontaneous closing of the host frameworks and result in stable opened forms. Introduced at a fraction of the maximal capacity, polymer chains cause an opening of the occupied nanochannels, and because of the MOF reticular stiffness, this opening is propagated to the neighboring nanochannels that become accessible,for adsorption. Composites were obtained by in situ,polymerization of vinyl monomers in the: nanochannels of an otherwise nonporous MOP, resulting in homogeneously loaded materials with a significant increase of porosity (S-BET m(2)/g);:in addition, by limiting the accessible configurations for the framework and forbidding the forbidding of a reactive intermediate, the polymeric guest prevented the thermal degradation of the host MOP even at very low loading (as low as. 3 wt %) and increased it's stability domain by more than 200 degrees C.