摘要
由4-氟苯甲酸(4-HFBA)、2,2’-联吡啶(2,2’-bpy)和DyCl3·6H2O合成了新的混配配合物,[Dy(4-FBA)3·2,2’-bpy]2。用X射线单晶衍射分析确定了其晶体结构。配合物属三斜晶系,P1^-空间群。晶胞参数:a=1.04175(15)nm,b=1.06730(15)nm,c=1.36157(19)nm,α=106.030(2)°,β=99.256(2)°,γ=95.949(2)°。M=735.99,V=1.4185(3)nm^3,Z=2,Dcake=1.723mg/m^3,F(000)=722。2个Dy^3+离子由4个对氟苯甲酸根以双齿桥联方式联结,形成了双核分子。羧酸采取了双齿螯合和双齿桥联2种配位方式,2,2’-联吡啶双齿螯合方式配位于中心镝离子。中心金属离子的配位数为8。Dy-O和Dy—N平均键长分别为0.2352和0.2592nm。配合物在201.0~580.0℃分解,总失重率为72.67%。在UV谱的284.0nm处出现配体的π→π^*跃迁。在配合物的荧光光谱中,主峰位于481和575nm,分属于Dy^3+的^4F9/2→^6H15/2和^4F9/2→^6H13/2跃迁。
The [ Dy (4-FBA) 3 ·2,2'-bpy ] 2 complex was synthesized from 4-fluorobenzoic acid ( 4-HFBA), 2,2'-bipyridine(2,2'-bpy) and DyCl3 · 6H2O. The crystal structure of the complex was determined by means of X-ray diffraction method. The complex crystallized into triclinic crystals with P1^- symmetry and the unit cell parameters are a=1.041 75(15) nm, b =1.067 30(15) nm, c=1.361 57(19) nm, α =106.030(2)°,β= 99. 256(2) °, γ = 95. 949 (2)°. M = 735.99, V = 1. 418 5 ( 3 ) nm^3, Z = 2, Dcake = 1. 723 mg/m^3, F(000) =722. The two Dy^3+ ions are bonded to four oxygen atoms from 4-fluorobenzoic acid, forming a binuclear molecule. The coordination number of the metal ion is eight. The complex exhibits photoluminescent emission peaks at 481 nm and 575 nm, corresponding to the transitions of the Dy^3+ ion:^4 F9/2→^6 H15/2 and ^4F9/2→^6H13/2.
出处
《应用化学》
CAS
CSCD
北大核心
2006年第12期1407-1409,共3页
Chinese Journal of Applied Chemistry
基金
北京市教育委员会科技发展计划面上资助项目(KM200510028007)
关键词
镝
对氟苯甲酸
混合配体配合物
晶体结构
性质表征
dysprosium ,fluorobenzoic acid, mixed-ligand complex, crystal structure, characterization