Guo Jun, Zhang Yin, Zhu Yanfei, Long Chang, Zhao Meiting, He Meng, Zhang Xiaofei, Lv Jiawei, Han Bing, Tang Zhiyong
CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, China.
Center for Nanochemistry, Peking University, Beijing, 100871, China.
Angew Chem Int Ed Engl. 2018 Jun 4;57(23):6873-6877. doi: 10.1002/anie.201803125. Epub 2018 May 3.
Chiral metal-organic framework (CMOF) nanosheets only a few layers thick remain a virgin land waiting for exploration. Herein, the first examples of ultrathin CMOF nanosheets are prepared by the confinement growth of two-dimensional (2D) chiral layers, which are assembled by helical metal-organic chains within microemulsion. This convenient and easily scaled up inverse microemulsion method gives a series of 2D CMOF nanosheets composed of variable metal nodes or chiral ligands. More significantly, thanks to the exceptionally large number of chiral sites exposed on surfaces, the as-obtained CMOF nanosheets exhibit much higher enantioselectivity in chiral separation compared with their bulk counterparts.
仅有几层厚的手性金属有机框架（CMOF）纳米片仍是一片有待探索的处女地。在此，通过二维（2D）手性层的限域生长制备了超薄CMOF纳米片的首个实例，这些手性层由微乳液中的螺旋金属有机链组装而成。这种便捷且易于放大的反相微乳液法得到了一系列由可变金属节点或手性配体组成的二维CMOF纳米片。更重要的是，由于表面暴露的手性位点数量异常之多，所获得的CMOF纳米片在手性分离中表现出比其块状对应物更高的对映选择性。
