Self-Assembly of Right-Handed Helical Infinite Chain, One- and Two-Dimensional Coordination Polymers Tuned via Anions

Using similar synthesis conditions and a flexible ligand, 1,2-bis(1,2,4-triazole-1-yl)ethane (L), we
isolated novel right-handed helical infinite chain [Zn(L)(Cl)2] (1), two-dimensional (2D) coordination polymers
[M(L)2(H2O)2]·(NO3)2 [M = Zn (2), Cd (3)], and a one-dimensional (1D) double-bridged complex [Cd(L)2(H2O)2]·(ClO4)2(H2O)2 (4), where anions could tune the self-assemblies to form different supramolecular and coordination networks.
Compound 1 is the first infinite helix in triazole compounds, where the supramolecular helical chain and the
coordination chain form a unique double helical structure. Nitrate and perchlorate anions induced different
supramolecular structures, which lead to the first case of the self-assembled CdN4O2 polyhedra from 2D to 1D
coordination polymers for 3 and 4, respectively.

采用相似的合成条件和一种灵活的配体，1,2-双(1,2,4-三唑-1-基)乙烷(L)，我们成功分离出新型右手螺旋无限链[Zn(L)(Cl)2] (1)，二维(2D)配位聚合物[M(L)2(H2O)2]·(NO3)2 [M = Zn (2), Cd (3)]，以及一维(1D)双桥联复合物[Cd(L)2(H2O)2]·(ClO4)2(H2O)2 (4)。在这些化合物中，阴离子能够调节自组装过程，形成不同的超分子和配位网络。化合物1是三唑化合物中的首个无限螺旋结构，其中超分子螺旋链与配位链共同构成独特的双螺旋结构。硝酸根和过氯酸根阴离子诱导出不同的超分子结构，分别导致了2D至1D配位聚合物3和4中自组装CdN4O2多面体的首次出现。