Borromean rings or links are topologically complex assemblies of three entangled rings where no two rings are interlinked in a chain-like catenane, yet the three rings cannot be separated. We report here a metallacycle complex whose crystalline network forms the first example of a new class of entanglement. The complex is formed from the self-assembly of CuBr2 with the cyclotriveratrylene-scaffold ligand (±)-tris(iso-nicotinoyl)cyclotriguaiacylene. Individual metallacycles are interwoven into a two-dimensional chainmail network where each metallacycle exhibits multiple Borromean-ring-like associations with its neighbours. This only occurs in the solid state, and also represents the first example of a crystalline infinite chainmail two-dimensional network. Crystals of the complex were twinned and have an unusual hollow tubular morphology that is likely to result from a localized dissolution-recrystallization process. Metallacycles made up of six copper ions and six cyclotriguaiacylene-based ligands form a unique topological entanglement in the solid state. Individual metallacycles are interwoven into an infinite 2D chainmail network where each one forms multiple Borromean-ring-like associations with its neighbours. Crystals of the complex grow in an unusual tubular morphology.
博罗梅环或链是三条交缠环的拓扑复杂组合,其中没有两个环以链状的形式相互链接,但这三条环无法分开。我们在这里报道了一种
金属环复合物,其晶体网络形成了一类新型缠绕的第一个例子。该复合物由CuBr2与环三
乙烯桥联
配体(±)-三(异烟酰)环三香烃的自组装构成。单个
金属环交织成二维链甲网络,其中每个
金属环与其邻近环呈现出多重类似博罗梅环的关联。这种现象仅发生在固态中,同时也代表了晶体无限链甲二维网络的第一个例子。该复合物的晶体是双晶,具有不寻常的中空管状形态,可能是由于局部溶解-重结晶过程导致的。由六个
铜离子和六个基于环三香烃
配体的
金属环组成,在固态下形成独特的拓扑缠绕。单个
金属环交织成一个无限的二维链甲网络,每个
金属环与其邻近的环形成多重类似博罗梅环的关联。该复合物的晶体以不寻常的管状形态生长。