School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, PR China.
Chem Asian J. 2013 Sep;8(9):2254-61. doi: 10.1002/asia.201300548. Epub 2013 Jun 21.
Two new hybrid compounds with tetragonal and dodecagonal helical channels, K[Ag14(pyttz)4(H2O)2][PW12O40]2⋅(OH)⋅5 H2O (1) and K[Ag14(pyttz)4(H2O)4][HSiW12O40]2⋅H2O (2), have been hydrothermally synthesized and structurally characterized by using routine techniques. X-ray diffraction analysis shows that compounds 1 and 2 are isostructural and crystallize in the monoclinic space group P2(1)/c. A fascinating structural feature of these compounds is that they form 3D POM-Ag frameworks with helical channels, which are the first examples of helical channels that are constructed from POMs and metal atoms. Notably, there are two types of spatial orientation of the POMs, which result in the formations of left- and right-handed helical chains. Furthermore, these different helical chains are perfectly enclosed through shared POMs, thereby forming tetragonal and dodecagonal helical channels. In addition, the photocatalytic degradation of RhB by these compounds was also investigated.
两种具有四方和十二方螺旋孔道的新型杂化化合物，K[Ag14(pyttz)4(H2O)2][PW12O40]2⋅(OH)⋅5 H2O（1）和 K[Ag14(pyttz)4(H2O)4][HSiW12O40]2⋅H2O（2），已经通过常规技术水热合成并进行了结构表征。X 射线衍射分析表明，化合物 1 和 2 是同构的，结晶于单斜空间群 P2(1)/c。这些化合物的一个迷人结构特征是它们形成了具有螺旋孔道的三维 POM-Ag 骨架，这是首次由 POMs 和金属原子构建螺旋孔道的例子。值得注意的是，POMs 有两种空间取向，导致形成了左手和右手螺旋链。此外，这些不同的螺旋链通过共享的 POMs 完美封闭，从而形成了四方和十二方螺旋孔道。此外，还研究了这些化合物对 RhB 的光催化降解性能。
