Garzón-Tovar Luis, Pérez-Carvajal Javier, Yazdi Amirali, Hernández-Muñoz Jose, Tarazona Pedro, Imaz Inhar, Zamora Félix, Maspoch Daniel
Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Bellaterra, 08193, Barcelona, Spain.
Departamento de Física Teórica de la Materia Condensada, IFIMAC Condensed Matter Physics Center, Universidad Autónoma de Madrid, 28049, Madrid, Spain.
Angew Chem Int Ed Engl. 2019 Jul 8;58(28):9512-9516. doi: 10.1002/anie.201904766. Epub 2019 Jun 3.
Herein, we describe a new class of porous composites comprising metal-organic framework (MOF) crystals confined in single spherical matrices made of packed covalent-organic framework (COF) nanocrystals. These MOF@COF composites are synthesized through a two-step method of spray-drying and subsequent amorphous (imine-based polymer)-to-crystalline (imine-based COF) transformation. This transformation around the MOF crystals generates micro- and mesopores at the MOF/COF interface that provide far superior porosity compared to that of the constituent MOF and COF components added together. We report that water sorption in these new pores occurs within the same pressure window as in the COF pores. Our new MOF@COF composites, with their additional pores at the MOF/COF interface, should have implications for the development of new composites.
在此，我们描述了一类新型的多孔复合材料，其由限制在由堆积的共价有机框架（COF）纳米晶体构成的单个球形基质中的金属有机框架（MOF）晶体组成。这些MOF@COF复合材料是通过喷雾干燥和随后的非晶态（基于亚胺的聚合物）到晶态（基于亚胺的COF）转变的两步法合成的。MOF晶体周围的这种转变在MOF/COF界面处产生了微孔和介孔，与将组成的MOF和COF组分加在一起相比，这些微孔和介孔提供了远为优越的孔隙率。我们报道，这些新孔隙中的水吸附发生在与COF孔隙相同的压力范围内。我们的新型MOF@COF复合材料在MOF/COF界面处具有额外的孔隙，应该对新型复合材料的开发具有重要意义。
