A2+ Cation Control of Chiral Domain Formation in A(TiO)Cu4(PO4)4 (A = Ba, Sr)
A2+ Cation Control of Chiral Domain Formation in A(TiO)Cu4(PO4)4 (A = Ba, Sr)
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DOI：
10.1021/acs.inorgchem.5b02622
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发表时间：
2016-02-01
影响因子：
4.6
通讯作者：
Kimura, Tsuyoshi
中科院分区：
文献类型：
--
作者：
Kimura, Kenta;Sera, Masakazu;Kimura, Tsuyoshi
Single crystals of two novel tetragonal chiral materials, A(TiO)Cu-4(PO4)(4) (A = Ba, Sr), were grown from Na2Mo2O7 flux, and their crystal and chiral domain structures were characterized. Polarized-light microscopy studies of the chiral domain structures in the crystals show that Ba(TiO)Cu-4(PO4)(4) mostly hosts a multidomain state, while a monodomain state predominantly appears in Sr(TiO)Cu-4(PO4)(4). To explain this striking difference, we quantified the chirality strength of these materials by comparing atomic positions in the chiral and nearest-achiral crystal structures, revealing larger chirality strength in Sr(TiO)Cu-4(PO4)(4) than in Ba(TiO)Cu-4(PO4)(4). Our proposed mechanisms linking the chirality strength and domain formation can account for the different occurrence frequency of chiral domains in this system.
