The chiral structure induced by lone-pair electrons: syntheses and characterization of two novel chiral rare-earth selenites containing homochiral helical chains
✍ Scribed by Dongrong Xiao; Haiyan An; Enbo Wang; Lin Xu; Changwen Hu
- Publisher
- Elsevier Science
- Year
- 2005
- Tongue
- English
- Weight
- 335 KB
- Volume
- 733
- Category
- Article
- ISSN
- 0022-2860
No coin nor oath required. For personal study only.
✦ Synopsis
Two novel layered chiral rare-earth selenites [Ln(H 2 O)(HSeO 3 )(SeO 3 )] H 2 O (LnZDy, 1, and Gd, 2) have been hydrothermally synthesized and characterized by the elemental analyses, IR spectra, XPS spectra, TG analyses and the single crystal X-ray diffraction. Compound 1 crystallizes in the orthorhombic system, space group P2 1 2 1 2 1 , with aZ6.5767(13) A ˚, bZ6.9320(14) A ˚, cZ16.333(3) A ˚, and ZZ4. Compound 2 crystallizes in the orthorhombic system, space group P2 1 2 1 2 1 , with aZ6.6216(13) A ˚, bZ7.0086(14) A ˚, cZ16.424(3) A ˚, and ZZ4. Compounds 1 and 2 are isostructural, and both exhibit interesting chiral layer constructed from {Ln(H 2 O)(HSeO 3 )} n left-handed helical chains linked by [SeO 3 ] 2K anions. Furthermore, the chiral layers are connected by strong hydrogen bonding interactions to form the three-dimensional structure with chiral channels along the [100] directions.