摘要
具有非对称中心结构的硼酸盐Bi2ZnB2O7由固相反应法在低于700℃下制备得到。X射线单晶结构分析表明,该化合物以正交空间群Pba2结晶,晶体学参数为:a=1.0819(2)nm,b=1.1023(2)nm,c=0.4890(1)nm,Z=4。其晶体结构中包含分别由[BO3]3-和[BO4]5-组成的[B2O5]4-和[B2O7]8-基团,它们被[ZnO4]四面体通过共用O原子的方式连接成二维2∞[ZnB2O7]6-层,这些层由Bi3 +离子进一步结合形成三维网。红外光谱证实了[BO3]3-和[BO4]5-基团的存在,粉末倍频效应测试表明,其强度为KDP(KH2PO4)的4倍,UV漫反射光谱表明该物质吸收边约为360 nm。
A non-centrosymmetric borate, Bi2ZnB2O7, has been prepared by solid-state reactions at temperature below 700℃. The single-crystal X-ray structural analysis showed that it crystallizes in the orthorhombic space group Pba2 with a=1.0819（2）nm,b=1.1023（2）nm,c=0.4890（1）nm,Z=4.It has a three dimensional （3D） structure in which [B2O5]^4- and [B2O7]^8- groups are bridged by [ZnO4]^6- tetrahedra through sharing O atoms to form 2D ^2 ∞[ZnB2O7]^6- layers that are further bridged by Bi^3＋ cations giving rise to the final 3D framework. The IR spectrum confirms the presence of both [BO3]^3- and [BO4]^5- groups,second-harmonic-generation measurements display a response of about 4×KDP（KH2PO4）, and UV-vis diffuse reflectance spectrum shows an absorption edge at about 360 nm.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2007年第5期1005-1010,共6页
Journal of Synthetic Crystals
基金
Project supported by the Talent Training Funds of Beijing (No. 20051D0501501)
the Funding Project for Academic HumanResources Development in Institutions of Higher Learning under the Jurisdiction of Beijing Municipality
Beijing Natural Science Foundation (No.2073021)
