摘要
以2,5-二羟基对苯二甲酸为配体,Eu(Ⅲ)为中心离子,甲醇和水为溶剂,采用溶剂热法合成一双核Eu(Ⅲ)配位聚合物{[Eu_2(H_2-DHBDC)_2(C_2O_4)_2(H_2O)_3](H_2O)}_n(H_2-DHBDC=2,5-二羟基对苯二甲酸).利用X-射线单晶衍射(SCXRD)、红外光谱(FTIR)、元素分析(EA)、热重(TG)分析等对其晶体结构和热稳定性进行表征.该晶体属三斜晶系,P-1空间群.其X射线单晶衍射结果表明,2个Eu(Ⅲ)离子处于不同的配位环境中,Eu(1)离子处于9配位的三帽三棱柱配位构型,而Eu(2)则处于8配位的双帽三棱柱配位构型,其双核单元通过配位模式不同的H2-DHBDC2-配体连接形成3D结构.
Taking 2,5-dihydroxy terephthalic as ligand,Eu(Ⅲ)as the central ions,methanol and water as the solvent,a Eu(Ⅲ)coordination polymer{[Eu_2(H_2-DHBDC)_2(C_2O_4)_2(H_2O)_3](H_2O)}_n(H2-DHBDC=2,5-dihydroxy terephthalic acid)is synthesized in water-methanol by solvothermal.The crystal structure and themal stability of the title complex is characterized by single crystal X-ray dif-fraction(SCXRD),elemental analysis(EA),fourier transform infrared spectrum(FTIR),thermal gravimetric(TG)analysis and fluorescence spectrum(FS).This crystal belongs to triclinic P-1space group.The SCXRD result shows that the two Eu^(3+)ions of title complex are in different coordination environments.Eu^(3+)(1)is coordinated with nine atoms in a distorted tricapped trigonal prism geometry.While Eu^(3+)(2)is liganted to eight atoms in a distorted bicapped trigonal prismatic geometry,the dinuclear units extend to 3Dnetwork through H2-DHBDC2-ligand for the complex.
出处
《纺织高校基础科学学报》
CAS
2017年第3期402-408,共7页
Basic Sciences Journal of Textile Universities
基金
陕西省科技攻关项目(2011K07-23)
省级大学生创新创业训练计划项目(1685)
关键词
2
5-二羟基对苯二甲酸
3D铕配合物
晶体结构
热稳定性
2,5-dihydroxy terephthalic acid
3D Eu(Ⅲ)coordination polymer
crystal structure
thermal stability
