Confined Synthesis of Two-Dimensional Covalent Organic Framework Thin Films within Superspreading Water Layer
Confined Synthesis of Two-Dimensional Covalent Organic Framework Thin Films within Superspreading Water Layer
复制标题
超扩散水层内二维共价有机骨架薄膜的受限合成
DOI：
10.1021/jacs.8b07120
复制
发表时间：
2018-09-26
影响因子：
15
通讯作者：
Wang, Dong
中科院分区：
文献类型：
--
作者：
Hao, Qing;Zhao, Chuangqi;Wang, Dong
以油浸水凝胶为反应器，在水凝胶表面超分散水，进行了二维共价有机骨架（2DCOF）薄膜的限制性合成。通过将两种单体分别负载到油和水凝胶中，在油/水/水凝胶界面处合成了COF薄膜。该方法为自支撑二维COF薄膜的制备提供了一条新的途径。详细表征的COF薄膜显示均匀的形貌，大面积，可控的厚度从4到150 nm，和结晶度与一定的取向。通过AFM压痕测量COF膜的杨氏模量为25.9 +/-0.6GPa，显示出良好的机械性能。在此基础上，成功地制备了纳米过滤膜和Ru ~（3+）光电化学传感器。此外，该策略还被推广到结晶咪唑骨架-8分子筛薄膜的合成中，显示出很高的应用潜力。
The confined synthesis of two-dimensional covalent organic framework (2D COF) thin films was developed by using thin superspreading water on the hydrogel immersed under oil as reactor. Through loading two monomers into oil and hydrogel, respectively, COF thin films are synthesized at the oil/water/hydrogel interface. This strategy provides a new way for synthesis of freestanding 2D COF thin films. Detailed characterizations of the COF thin films reveal homogeneous topography, large area, controllable thickness from 4 to 150 nm, and crystallinity with certain orientation. Young's modulus of COF film is measured by AFM indentation as 25.9 +/- 0.6 GPa, showing good mechanical properties. On the basis of the freestanding COF films, a nanofilter membrane and photoelectrochemical sensors for Ru3+ were successfully developed. Moreover, the strategy was extended to the synthesis of crystalline zeolitic imidazolate framework-8 thin film, which exhibited high application potential.