首页|ASb(SO4)2(A=Rb,Cs):Two short-wave UV antimony sulfates exhibiting large birefringence
ASb(SO4)2(A=Rb,Cs):Two short-wave UV antimony sulfates exhibiting large birefringence
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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+.
Antimony sulfatesBirefringent crystalsLarge birefringenceShort UV absorption edgeStereochemically active lone pair
Yang Lan、Jinxuan Ren、Pu Zhang、Xuehua Dong、Ling Huang、Liling Cao、Daojiang Gao、Guohong Zou
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College of Chemistry and Materials Science,Sichuan Normal University,Chengdu 610066,China
College of Chemistry,Sichuan University,Chengdu 610065,China
国家自然科学基金国家自然科学基金国家自然科学基金Fundamental Research Funds from Sichuan University
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