Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States.
J Am Chem Soc. 2010 Nov 10;132(44):15687-91. doi: 10.1021/ja106381x.
Polymer substrates have been functionalized with a MOF material (MIL-47) synthesized directly on polyacrylonitrile using in situ microwave irradiation. The growth of MIL-47 on these substrates was studied as a function of microwave irradiation time using scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. The conversion of nitrile to carboxylic acid groups on the PAN surface was necessary for the growth of MIL-47 on the substrate. MIL-47 crystals grew over time at the expense of a related disordered precursor phase, which lacks the long-range order of MIL-47. This work paves the way for the development of a new class of hybrid MOF-polymer materials that will extend the applications of MOFs to fields such as membrane separations, filtration, and protective textiles.
聚合物基底已通过原位微波辐射在聚丙烯腈上直接合成的 MOF 材料（MIL-47）进行功能化。使用扫描电子显微镜、X 射线衍射、傅里叶变换红外光谱和 X 射线光电子能谱研究了这些基底上 MIL-47 的生长情况，作为微波辐射时间的函数。在基底上生长 MIL-47 需要 PAN 表面上的腈基转化为羧酸基团。随着时间的推移，MIL-47 晶体不断生长，消耗了一种相关的无定形前体相，该前体相缺乏 MIL-47 的长程有序性。这项工作为开发一类新的混合 MOF-聚合物材料铺平了道路，这将使 MOFs 在膜分离、过滤和防护纺织品等领域的应用得到扩展。
