The construction of interlocked topologies by metal-cation-template methods has been extensively explored.However,construction of these species using template-free chemical self-assembly methods is hard to rationally ...The construction of interlocked topologies by metal-cation-template methods has been extensively explored.However,construction of these species using template-free chemical self-assembly methods is hard to rationally achieve due to the inherent unpredictability of self-assembly processes.In this work,a strategy to construct interlocked[2]catenanes by coordination-driven template-free self-assembly is demonstrated,whereby combining rigid bidentate ligands with large conjugated-πarea units and building blocks with appropriate lengths facilitated construction of interlocked[2]catenane compounds.Two rigid bidentate ligands,L1 and L2,were chosen to self-assemble with three dinuclear building blocks B1,B2 and B3.Ultimately,the successful construction of three[2]catenanes demonstrated the validity of the strategy.Although[2]catenanes are the simplest of all interlocked topologies,this motif is the basis for constructing more intricate topologies.This successful strategy may therefore lead to construction of other,more intricate topologies in the future.展开更多
基金This work was supported by the National Natural Science Foundation of China(Nos.22031003 and 21720102004)the Shanghai Science Technology Committee(No.19DZ2270100).
文摘The construction of interlocked topologies by metal-cation-template methods has been extensively explored.However,construction of these species using template-free chemical self-assembly methods is hard to rationally achieve due to the inherent unpredictability of self-assembly processes.In this work,a strategy to construct interlocked[2]catenanes by coordination-driven template-free self-assembly is demonstrated,whereby combining rigid bidentate ligands with large conjugated-πarea units and building blocks with appropriate lengths facilitated construction of interlocked[2]catenane compounds.Two rigid bidentate ligands,L1 and L2,were chosen to self-assemble with three dinuclear building blocks B1,B2 and B3.Ultimately,the successful construction of three[2]catenanes demonstrated the validity of the strategy.Although[2]catenanes are the simplest of all interlocked topologies,this motif is the basis for constructing more intricate topologies.This successful strategy may therefore lead to construction of other,more intricate topologies in the future.
