4'-(2-吡啶基)三联吡啶的镧系(Ⅲ)配合物的晶体结构、荧光性质和磁性
Lanthanide(Ⅲ) complexes derived from 4'-(2-pyridyl)-2,2'∶6',2″-terpyridine: Crystal structures, fluorescent and magnetic properties
作者单位E-mail
王朝阳 河北工业大学化工学院, 天津市本质安全化工技术重点实验室, 天津 300130  
杨春 河北工业大学化工学院, 天津市本质安全化工技术重点实验室, 天津 300130 ychun@hebut.edu.cn 
宋瑶瑶 河北工业大学化工学院, 天津市本质安全化工技术重点实验室, 天津 300130  
韩娜 河北工业大学化工学院, 天津市本质安全化工技术重点实验室, 天津 300130  
刘晓蒙 河北工业大学化工学院, 天津市本质安全化工技术重点实验室, 天津 300130  
王庆伦 南开大学化学学院, 先进能源材料化学教育部重点实验室, 天津 300071  
摘要: 以 4'-(2-吡啶基)-2,2'∶6',2″-三联吡啶(2-pyterpy)为配体,通过溶剂热法合成了 5 个双核配合物[Ln(2-pyterpy)(NO3)2( μ-OCH3)]2(Ln-2-pyterpy,Ln=Pr、Sm、Eu、Dy、Er)。单晶X射线衍射分析表明,配合物Pr-2-pyterpy和Sm-2-pyterpy同构,属于单斜晶系,P21空间群,a=0.956 43(19) nm,b=1.965 4(4) nm,c=1.193 5(2) nm,β=90.41(3)°。配合物Er-2-pyterpy属于单斜晶系,C2/c空间群,a=2.838 8(6) nm,b=1.204 8(2) nm,c=1.520 6(3) nm,β=121.70(3)°。粉末 X 射线衍射研究表明,配合物 Eu-2-pyterpy 与 Dy-2-pyterpy同构且与文献报道的配合物[Ln(2-pyterpy)(NO3)2( μ-OCH3)]2(Ln=Tb,Dy)结构相同,属于单斜晶系,P21/n空间群。镧系收缩效应在调整该系列配合物结构中起到了重要作用。固态配合物Ln-2-pyterpy(Ln=Pr、Sm、Eu、Dy)均发射Ln(Ⅲ)的特征荧光。在300 K,配合物Ln-2-pyterpy(Ln=Pr、Sm、Eu、Dy)的χMT实验值与2个孤立的Ln(Ⅲ)离子的理论值基本一致。根据2 K时χMT实验值推断,配合物Sm-2-pyterpy和Eu-2-pyterpy的顺磁离子间分别通过甲氧基桥传递弱的反铁磁和铁磁耦合作用。
关键词: 镧系(Ⅲ)配合物  三联吡啶  荧光性质  磁性
基金项目: 国家自然科学基金(No.21771111,21101096,21371104)和河北省引进留学人员资助项目(No.C20200317)资助。
Abstract: Five dinuclear complexes [Ln(2-pyterpy)(NO3)2( μ-OCH3)]2 (Ln-2-pyterpy, Ln=Pr, Sm, Eu, Dy, Er) were synthesized by solvothermal method using 4'-(2-pyridyl )-2,2'∶6',2″-terpyridine (2-pyterpy) as ligand. Single crystal X-ray diffraction analysis showed that complexes Pr-2-pyterpy and Sm-2-pyterpy are isomorphic and crystallize in monoclinic system, space group P21 with a=0.956 43(19) nm, b=1.965 4(4) nm, c=1.193 5(2) nm, β=90.41(3)°. Complex Er-2-pyterpy crystallizes in monoclinic system, space group C2/c with a=2.838 8(6) nm, b=1.204 8(2) nm, c= 1.520 6(3) nm, β=121.70(3)°. Powder X-ray diffraction results showed that complexes Ln-2-pyterpy (Ln=Eu, Dy) are isomorphic and have the same structure as the reported complexes [Ln(2-pyterpy)(NO3)2( μ-OCH3)]2 (Ln=Tb, Dy), crystallizing in monoclinic crystal system, space group P21/n. The lanthanide contraction effect plays an important role in adjusting the structure of this series of complexes. The solid complexes Ln-2-pyterpy (Ln=Pr, Sm, Eu, Dy) emitted the characteristic fluorescence of Ln(Ⅲ) ions. At 300 K, the χMT experimental values of complexes Ln-2-pyterpy (Ln=Pr, Sm, Eu, Dy) were consistent with the theoretical values of two corresponding isolated Ln(Ⅲ) ions. According to the χMT experimental value at 2 K, the weak antiferromagnetic and ferromagnetic coupling effects between the Ln(Ⅲ) ions of the complexes Sm-2-pyterpy and Eu-2-pyterpy are transmitted by methoxy-bridge, respectively.
Keywords: lanthanide(Ⅲ) complex  terpyridine  fluorescent property  magnetic property
投稿时间:2024-04-07 修订日期:2024-07-15
摘要点击次数:  952
全文下载次数:  932
王朝阳,杨春,宋瑶瑶,韩娜,刘晓蒙,王庆伦.4'-(2-吡啶基)三联吡啶的镧系(Ⅲ)配合物的晶体结构、荧光性质和磁性[J].无机化学学报,2024,40(8):1442-1451.
查看全文  查看/发表评论  下载PDF阅读器
Support information: 相关附件:   20240114_辅助材料.doc