Feng Xiaopeng, Shen Bowen, Sun Bo, Kim Jehan, Liu Xin, Lee Myongsoo
State Key Laboratory for Supramolecular Strucuture and Materials, College of Chemistry, Jilin University, Changchun, 130012, China.
Department of Chemistry, Fudan University, Shanghai, 200438, China.
Angew Chem Int Ed Engl. 2020 Jul 6;59(28):11355-11359. doi: 10.1002/anie.202003807. Epub 2020 May 4.
Although considerable effort in recent years has been devoted to the development of two-dimensional nanostructures, single-layered chiral sheet structures with a lateral assembly of discrete clusters remain elusive. Here, we report single-layered chiral 2D sheet structures with dual chiral void spaces in which discrete clusters of planar aromatic segments are arranged with in-plane AB order in aqueous methanol solution. The chirality of the sheet is induced by the slipped-cofacial stacks of rectangular plate-like aromatic segments in the discrete clusters which are arranged laterally with up and down packing, resulting in dual chiral void spaces. The chiral nanosheets function as superfast enantiomer separation nanomaterials, which rapidly absorb a single enantiomer from a racemic mixture with greater than 99 % ee.
尽管近年来人们在二维纳米结构的开发上投入了大量精力，但具有离散簇横向组装的单层手性片状结构仍然难以实现。在此，我们报道了具有双 chiral 空隙空间的单层手性二维片状结构，其中平面芳香族片段的离散簇在甲醇水溶液中以面内 AB 顺序排列。片状结构的手性由离散簇中矩形板状芳香族片段的错面堆叠诱导，这些片段以上下堆积的方式横向排列，从而产生双 chiral 空隙空间。这种手性纳米片用作超快速对映体分离纳米材料，能从外消旋混合物中快速吸收单一对映体，对映体过量率大于99%。
