Spontaneous Resolution upon Crystallization of 3D, Chiral Inorganic Networks Assembled from Achiral, Polyoxometallate Units and Metal Ions
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- 作者：Amanpreet Kaur ; Geeta Hundal ; Maninder Singh Hundal
- 刊名：Crystal Growth & Design
- 出版年：2013
- 出版时间：September 4, 2013
- 年：2013
- 卷：13
- 期：9
- 页码：3996-4001
- 全文大小：388K
- 年卷期：v.13,no.9(September 4, 2013)
- ISSN：1528-7505
文摘
Two enantiomerically pure 3D chiral POM-based compounds 1a and 1b, having formula (H3O+)2[K2(SiW12O40)(H2O)4]路H2O, have been isolated during crystallization. Single-crystal X-ray diffraction analysis revealed that 1a and 1b are enantiomers, crystallizing in chiral space groups P6222 and P6422, respectively. The compounds are optically active, and their UV spectra show Cotton effects in the opposite direction. Compounds 1a and 1b represent the examples of 3D chiral frameworks of POM-based inorganic skeletons, obtained by spontaneous resolution upon crystallization from achiral precursors. The crystal structures represent open frameworks with water molecules in the chiral, nanotubular channels.