两种基于B_(5)O_(n)(n=11,12)簇构筑的具有深紫外吸收的硼酸盐  

Two B_(5)O_(n)(n=11,12)Cluster-based Borates with Deep UV Cutoff Edge

作　　者：陈崇安 杨国昱 CHEN Chongan;YANG Guoyu(Key Laboratory of Cluster Science,Ministry of Education,School of Chemistry and Chemical Engineering,Beijing Institute of Technology,Beijing 102488,China)

机构地区：[1]北京理工大学化学与化工学院,原子分子簇科学教育部重点实验室,北京102488

出　　处：《高等学校化学学报》2022年第1期197-202,共6页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:21831001,21571016,91122028);国家杰出青年科学基金(批准号:20725101)资助~~。

摘　　要：以碱金属和碱土金属为模板,在溶剂热条件下合成了两种具有深紫外吸收特性的硼酸盐Na_(2)Ba·[B_(5)O_(8)(OH)]_(2)·2H_(2)O(1)和KSr[B_(5)O_(8)(OH)_(2)](2),并利用单晶X射线衍射(SCXRD)、粉末X射线衍射(PXRD)、傅里叶变换红外(FTIR)光谱、紫外-可见吸收光谱(UV-Vis)和热重分析(TG)等手段对化合物的结构和性能进行了研究.结果表明,化合物1可归属于单斜晶系P2/c空间群,结构中四连接的B_(5)O_(10)(OH)簇单元通过共氧连接形成含有两种9-元环窗口的二维层;化合物2结晶于单斜晶系C2/c空间群,结构中四连接的B_(5)O_(10)(OH)_(2)簇单元则通过共氧交替连接构筑了罕见的含有8-/12-元环孔道的二维褶皱层.两种基于B_(5)O_(n)(n=11,12)簇单元构筑的化合物均具有低于200 nm的深紫外吸收边,在紫外/深紫外区具有潜在的应用价值.Two new borates Na_(2)Ba[B_(5)O_(8)(OH)]_(2)·2H_(2)O(1)and KSr[B_(5)O_(8)(OH)_(2)](2),with deep UV cutoff edges,were solvothermally made by using mixed alkali and alkaline-earth metal templates.They were further characterized by single-crystal XRD,powder XRD,IR spectra,UV-Vis absorption spectra and thermogravimetric analysis.Compound 1 crystalizes in the monoclinic space group P2/c.4-connected B_(5)O_(10)(OH)cluster build 2D monolayer with two kinds of 9-MR windows via corner-sharing.Compound 2 crystalizes in the monoclinic space group C2/c.4-con⁃nected B_(5)O_(10)(OH)_(2) cluster construct 2D fluctuant layer with different 8-and 12-MR unclosed channels along two different directions.Both 1 and 2 exhibit the cutoff edge below 200 nm,indicating their potential applications in UV and deep UV regions.

关 键 词：硼氧团簇 溶剂热合成 层状结构 短边吸收 

分 类 号：O614[理学—无机化学]