SrTi(IO3)6·2H2O and SrSn(IO3)6: distinct arrangements of lone pair electrons leading to large birefringences. Issue 17 (10th March 2021)

• Record Type: Journal Article
• Authors: Liu, Kaitong; Han, Jian; Huang, Junben; Wei, Zhonglei; Yang, Zhihua; Pan, Shilie
• Is Part Of: RSC advances. Volume 11:Issue 17(2021)
• Page Start: 10309
• Page End: 10315
• Publication Date: 2021-03-10
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d0ra10726c
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : The distinct arrangements of [IO3 ] − trigonal pyramids lead to larger birefringences in SrTi(IO3 )6 ·2H2 O and SrSn(IO3 )6 than that in (H3 O)2 Ti(IO3 )6 . Abstract : Three new iodates SrTi(IO3 )6 ·2H2 O, (H3 O)2 Ti(IO3 )6, and SrSn(IO3 )6 have been synthesized via a facile hydrothermal method. The three compounds have zero-dimensional crystal structures composed of one [MO6 ] 8− (M = Ti, Sn) octahedron connected with six [IO3 ] − trigonal pyramids. However, the particular coordination of Sr 2+ cations results in distinct arrangements of lone pair electrons in an [IO3 ] − trigonal pyramid, which leads to large birefringences. More importantly, this work enriches the species crystal chemistry for [M(IO3 )6 ] 2− (M = Ti, Sn) clusters-containing iodates.