| Title: | Assembly and spontaneous resolution of the chiral inorganic polyoxometalates-based frameworks via helical chains association |
| Author(s): | Tang Q; Liu S; Liu Y; Li S; Ma F; Li J; Wang S; Liu C; |
| Address: | "Key Laboratory of Polyoxometalate Science of the Ministry of Education, College of Chemistry, Northeast Normal University, Changchun, Jilin 130024, China" |
| ISSN/ISBN: | 1477-9234 (Electronic) 1477-9226 (Linking) |
| Abstract: | "Two pairs of enantiomerically pure three-dimensional (3D) chiral polyoxometalate (POM) framework materials l,d-[K(H2O)]6.[H2GeW12O40]3.35H2O (1a and 1b) and l,d-[K(H2O)]6.[H2SiW12O40]3.29H2O (2a and 2b) based on inorganic achiral building blocks, have been synthesized and characterized by X-ray crystallography, elemental analysis, powder X-ray diffraction (PXRD), UV-Vis spectroscopy, circular dichroism (CD) spectra. Single-crystal X-ray diffraction analyses revealed that 1a and 1b, 2a and 2b are enantiomers, respectively. In 1a and 1b, 2a and 2b, K(H2O)n link terminal oxygen and mu2-bridging oxygen of Keggin-type polyanion moieties to generate 1D 31 helical infinite chiral chains, which are further connected by the achiral Keggin-type polyoxoanions to form 3D 4,8-connected chiral self-assembly frameworks with 4(12).6(10).8(6)4(6)2 topology. 1 and 2 are isostructural. They are obtained by spontaneous resolution upon crystallization in the absence of any chiral source. They represent new examples of chiral self-penetrating pure inorganic frameworks known for POM systems. Compounds 1 and 2 display adsorption activity toward volatile organic compounds (VOCs)" |
| Keywords: | Stereoisomerism Tungsten Compounds/*chemistry X-Ray Diffraction; |
| Notes: | "MedlineTang, Qun Liu, Shuxia Liu, Yiwei Li, Shujun Ma, Fengji Li, Jianxin Wang, Shengtian Liu, Chengzhan eng Research Support, Non-U.S. Gov't England 2013/05/01 Dalton Trans. 2013 Jun 21; 42(23):8512-8. doi: 10.1039/c3dt50672j. Epub 2013 Apr 29" |
