State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China.
Dalton Trans. 2013 Mar 21;42(11):3936-40. doi: 10.1039/c2dt32161k. Epub 2013 Jan 18.
ZIF-8 crystal coatings were prepared by direct growth on different flexible polyimide substrates including a thin membrane and electrospun nanofiber mat. In SEM pictures, the ZIF-8 crystals exhibit a rhombic dodecahedron morphology. Owing to the flexible polyimide substrate, the MOF-polymer film may be moderately bent or easily tailored when not destroyed. The ZIF-8 coatings can be activated at high temperature owing to the excellent thermal resistance and low coefficient of thermal expansion of the polyimide. Furthermore, this material may be used as an efficient heterogeneous catalyst for the Knoevenagel reaction and can be easily recovered. The ZIF-8 coatings and 2-methylimidazole show similar catalytic behaviour as a weak base.
ZIF-8 晶体涂层通过在不同的柔性聚酰亚胺基底上直接生长来制备，基底包括薄膜和静电纺纳米纤维毡。在扫描电子显微镜图片中，ZIF-8 晶体呈现出菱十二面体的形态。由于柔性聚酰亚胺基底的存在，在不被破坏的情况下，MOF-聚合物薄膜可以适度弯曲或轻松剪裁。ZIF-8 涂层由于聚酰亚胺的优异耐热性和低热膨胀系数，可以在高温下进行激活。此外，这种材料可用作 Knoevenagel 反应的高效非均相催化剂，并且易于回收。ZIF-8 涂层和 2-甲基咪唑表现出相似的催化行为，作为弱碱。
