(BiBr_(6))^(3-)作为抗衡离子的稀土18-冠-6配合物的合成与晶体结构  

Synthesis and Crystal Structure of Ln(Ⅲ)with 18-crown-6 Compound Balanced by(BiBr_(6))^(3-)

作　　者：翁果果 王磊 杨益 赵雨彤 张世勇 WENG Guoguo;WANG Lei;YANG Yi;ZHAO Yutong;ZHANG Shiyong(School of Chemistry and Chemical Engineering,Key Laboratory of Jiangxi University for Functional Materials Chemistry,Gannan Normal University,Ganzhou 341000,China)

机构地区：[1]赣南师范大学化学化工学院,江西省高等学校功能材料化学重点实验室,江西赣州341000

出　　处：《赣南师范大学学报》2024年第3期67-71,共5页Journal of Gannan Normal University

基　　金：国家自然科学基金项目(22161002);江西省教育厅项目(GJJ2201225);江西省功能材料化学重点实验室开放课题(FMC202301);赣南师范大学科研启动经费项目(BSJJ202238)。

摘　　要：将Ln_(2)O_(3),BiBr_(3)和18-冠-6在氢溴酸(HBr)条件下混合反应,得到2个新型配合物[Ln(18-冠-6)(H_(2)O)_(4)](BiBr_(6))·3.5H_(2)O[Ln=Nd(1)和La(2)].单晶结构分析表明,化合物1和2是异质同构体,均结晶于单斜晶系C 2/c空间群.以化合物1为例,其晶胞参数a=23.691(2),b=13.7758(11),c=20.2969(18),α=γ=90°,β=108.063(5)°.化合物1中的一个Nd^(3+)离子被冠醚的6个氧原子螯合,并与冠醚环上下的两对配位水分子进一步配位,形成单核[Nd(18-冠-6)(H_(2)O)_(4)]^(3+)离子,该阳离子与抗衡阴离子(BiBr_(6))^(3-)形成的离子对,分别从两个不同的维度以“之”字形交替堆叠形成三维结构,晶格水分子填充在空隙空间中.Two novel complexes[Ln(18-crown-6)(H_(2)O)_(4)](BiBr_(6))·3.5H_(2)O[Ln=Nd(1)and La(2)]were obtained by mixing Ln_(2)O_(3),BiBr_(3)and 18-crown-6 under HBr solution.Crystallographic structure analysis showed that compounds 1 and 2 are heterogeneous isomorphism and crystallized in the C 2/c space group of monoclinic system.Taking compound 1 for example,the crystal cell parameters of which are as follows:a=23.691(2),b=13.7758(11),c=20.2969(18),α=γ=90°,β=108.063(5)°.In compound 1,the Nd 3+cation is chelated by six oxygen atoms of the crown ether,and further coordinated by four water molecules above and below the crown ether ring,thus forming the mononuclear[Nd(18-crown-6)(H_(2)O)_(4)]^(3+)cation.The[Nd(18-crown-6)(H_(2)O)_(4)]^(3+)and(BiBr_(6))^(3-)anions pairs are stacked in an alternating manner along zigzag tracks originating from two different dimensions,thereby constructing a three-dimensional supramolecular structure.Furthermore,the void space is partially occupied by lattice water molecules.

关 键 词：稀土离子 18-冠-6 (BiBr_(6))^(3-)阴离子 晶体结构 

分 类 号：O641.4[理学—物理化学]