175278-10-1Relevant articles and documents
Construction of Stable Helical Metal-Organic Frameworks with a Conformationally Rigid “Concave Ligand”
Zhao, Kai,He, Ying,Shan, Chuan,Wojtas, Lukasz,Ren, Junyu,Yan, Yu,Shi, Hanzhong,Wang, Haonan,Song, Zhiguang,Shi, Xiaodong
, p. 10833 - 10838 (2021)
A helical metal-organic framework was prepared by using a conformationally rigid tetratopic benzoic acid ligand with binding units pointing toward each other (concave ligand). To avoid the obvious intramolecular interactions between binding units, matching spacing groups were applied to introduce atropic repulsion, thereby allowing the formation of extended frameworks for the first time. With this new ligand design, a helical-shaped MOF with significantly improved air and moisture stability was successfully prepared, thus providing a new strategy for ligand design toward porous material constructions.
Covalently Interlocked Cyclohexa-m-phenylenes and Their Assembly: En Route to Supramolecular 3D Carbon Nanostructures
Dumslaff, Bastian,Reuss, Anna N.,Wagner, Manfred,Feng, Xinliang,Narita, Akimitsu,Fytas, George,Müllen, Klaus
supporting information, p. 10602 - 10606 (2017/08/22)
In our search to cluster as many phenylene units as possible in a given space, we have proceeded to the three-dimensional world of benzene-based molecules by employing covalently interlocked cyclohexa-m-phenylenes, as present in the unique paddlewheel-sha
Efficient synthesis of rigid ladder polymers via palladium catalyzed annulation
Liu, Sheng,Jin, Zexin,Teo, Yew Chin,Xia, Yan
supporting information, p. 17434 - 17437 (2015/02/05)
We report a new method to synthesize rigid ladder polymers using efficient palladium catalyzed annulation reactions with low catalyst loading (1 mol %). Rigid ladder polymers with benzocyclobutene backbone linkages can be synthesized from copolymerization of readily accessible aryl dibromides and norbornadiene or polymerization of AB type monomers bearing norbornene and aryl bromide or triflate moieties. High molecular weight (10-40 kDa) rigid ladder polymers can be obtained with complete monomer conversions. Diverse monomers also gave different, fixed ladder polymer conformations. The ladder polymers exhibited excellent thermal stability, high carbonization yield, and large intrinsic porosity.