ASb(SO_(4))_(2)(A=Rb,Cs):Two short-wave UV antimony sulfates exhibiting large birefringence  

作　　者：Yang Lan Jinxuan Ren Pu Zhang Xuehua Dong Ling Huang Liling Cao Daojiang Gao Guohong Zou 

机构地区：[1]College of Chemistry and Materials Science,Sichuan Normal University,Chengdu 610066,China [2]College of Chemistry,Sichuan University,Chengdu 610065,China

出　　处：《Chinese Chemical Letters》2024年第1期514-517,共4页中国化学快报（英文版）

基　　金：the National Natural Science Foundation of China(Nos.22122106,22071158,21971171);the Fundamental Research Funds from Sichuan University(No.2021SCUNL101).

摘　　要：Herein,two antimony sulfates,named RbSb(SO_(4))_(2)(1)and CsSb(SO_(4))_(2)(2),have been successfully synthesized with the introduction of Sb^(3+)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,respectively),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 moieties including SbO4 seesaws and SO4 tetrahedral groups,they exhibit significantly opposite macroscopic symmetries,i.e.,compound 1 crystallizes in a centrosymmetric(CS)manner(P2_(1)/n)and compound 2 in a noncentrosymmetric(NCS)manner(P2_(1)2_(1)2_(1)),due to the size of cations[r(Rb+)=1.56 A˚,r(Cs+)=1.67 A˚]affects the orientation of SCALP of the adjacent Sb^(3+).

关 键 词：Antimony sulfates Birefringent crystals Large birefringence Short UV absorption edge Stereochemically active lone pair 

分 类 号：TQ135.31[化学工程—无机化工]