Abstract
Herein,two antimony sulfates,named RbSb(SO4)2(1)and CsSb(SO4)2(2),have been successfully synthe-sized with the introduction of Sb3+cation with stereochemically active lone pairs(SCALP)into sulfates by the conventional hydrothermal method.Both two compounds endow short ultraviolet(UV)absorption edges(281 nm and 278 nm,respectively)and large birefringence(0.171@546 nm and 0.174@546 nm,re-spectively),which means that they are promising short-wave UV optical materials.Interestingly,though both of the two compounds exhibit similar 1D chained structures,and possess the same functional moi-eties including SbO4 seesaws and SO4 tetrahedral groups,they exhibit significantly opposite macroscopic symmetries,i.e.,compound 1 crystallizes in a centrosymmetric(CS)manner(P21/n)and compound 2 in a noncentrosymmetric(NCS)manner(P212121),due to the size of cations[r(Rb+)=1.56 Å,r(Cs+)=1.67 Å]affects the orientation of SCALP of the adjacent Sb3+.
基金项目
国家自然科学基金(22122106)
国家自然科学基金(22071158)
国家自然科学基金(21971171)
Fundamental Research Funds from Sichuan University(2021SCUNL101)
NETL
NSTL
万方数据