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| 1 | Nanoscale Metal−Organic Layers for Biomedical Applications显示文摘CONSPECTUS:As a monolayer version of nanoscale metal organic frameworks(nMOFs),nanoscale metal−organic layers(nMOLs)have recently emerged as a novel class of twodimensional(2D)molecular nanomaterials.nMOLs are built from metal-oxo secondary building units(SBUs)with suitable coordination modes and organic linkers with proper geometries in a bottom-up fashion by carefully controlling the reaction temperature,capping agents,water concentration,and other parameters.M_(6)-BTB and related nMOLs are formed by linking M_(6)(μ_(3)-O)_(4)(μ_(3)-OH)_(4)(M=Zr^(4+),Hf^(4+),Ce^(4+))SBUs and planar tricarboxylate bridging ligands such as 1,3,5-benzene-tribenzoate(BTB),while M_(12)-nMOLs are constructed from M_(12)(μ_(3)-O)_(8)(μ_(3)-OH)_(8)(μ_(2)-OH)_(6)(M=Zr^(4+),Hf^(4+))SBUs and linear dicarboxylate ligands such as 5,15-di(p-benzoato)porphyrin(DBP).Mechanistic studies revealed the important roles of capping agents and water on the growth of nMOLs and the stepwise growth process involving the partial hydrolysis of metal ions to form metal-oxo clusters with capping agents and the subsequent replacement of capping agents by bridging ligands.The 2D nature of nMOLs facilitates the postsynthetic modification of bridging ligands and the exchange of capping agents to simultaneously incorporate multifunctionalities into nMOLs. | Ziwan Xu Taokun Luo Wenbin Lin | 2021 | Accounts of Materials Research2021，2，10： | 0 |
| 2 | Reticular chemistry at the atomic,molecular,and framework scales显示文摘'There's plenty of room at the bottom.'Feynmans talk has been frequently quoted for the advent of nanoscience,which gives profound perspectives of arranging atoms in the way we want[1].With the same bottom-up manner,reticular chemistry is concerned with linking of molecular building blocks by strong bonds to make crystalline open frameworks[2].The most im portant category practicing this bottom-up strategy at framework scale is m etal-organic frameworks(MOFs)coined in 1995[3],which leads to synthetic crystals featuring ultrahigh surface areas,fine-tuned pore metrics,and multivariate functionalities[4-16].The same strategy has also been successfully extended to crystalline covalent organic frameworks(COFs)from entirely organic building blocks through strong covalent bonds[17-19],whose crystal structures are now possible to be determ ined by 3D electron diffraction[20]and even X-ray diffraction[21].Recently,molecular weaving adds exotic flavors to reticular chemistry enabling the interlacing,knitting,and crocheting with molecular threads to make resilient nanotextiles[22].We envision the future of this field lays on the anisotropic reticular chem istry[23],where the components can be precisely arranged and manipulated along a specific direction.The atomic arrangement of various metals in the structures can be eventually read. | Yue-Biao Zhang Qiaowei Li Hexiang Deng | 2021 | Nano Research2021，14，2： | 0 |
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