摘要
通过水热反应合成5种结构新颖的配聚物:{[Ln_2(1,3-bdc)_3(H_2O)_4](DMF(H_2O}_n[Ln=Pr(1),Nd(2),Gd(3)]和{[Ln_4(1,3-bdc)_6(H_2O)_4(DMF)](DMF(2H_2O}_n[Ln=Er(4),Ho(5)](1,3-bdc:间苯二甲酸,DMF:N,N-二甲基酰胺)。通过单晶X射线衍射、红外光谱、紫外-可见-近红外(UV-Vis-NIR)光谱、荧光光谱等技术手段对产物的结构和性能进行了表征。结果表明,配聚物1~3是同构的,属单斜晶系,P2(1)/n空间群;配聚物4、5是同构的,属三斜晶系,P-1空间群。在晶体中,间苯二甲酸根采用多样的配位模式,使配聚物呈现多维的结构。除配聚物4,其余均呈现Ln(Ⅲ)的特征NIR发光,并与其UV-Vis-NIR吸收光谱相关联。
Five novel Ln ( Ⅲ ) coordination polymers, { [ Ln2 (1,3-bdc) 3 ( H2 O), ] ( DMF ( H2 O } n ( Ln = Pr(1), Nd(2), Gd(3)) and {[Ln4(1,3-bdc)6(H2O)4(DMF)](DMF(2H2O }n(Ln =Er(4), Ho(5)) (1,3-bdc = isophthalic acid, DMF = N, N-dimethyl formamide), have been synthesized by hydrothermal methods and characterized by single-crystal X-ray diffraction, infrared spectroscopy (IR), ultraviolet-visible-near infrared(UV-Vis-NIR) and fluorescence spectroscopy. The results show that coordination polymers 1 to 3 are isomorphous and crystallized in the monoclinic with space group P2 (1)/n, and coordination polymers 4 and 5 are isomorphous and belong to the triclinic system with space group P-1. Polymers present multidimensional structures due to versatile coordination modes of 1,3-bdc2- in crystals. Except for coordination polymer 4, others exhibit NIR luminescent properties that are associated with UV-Vis-NIR absorption spectra.
作者
胡晓双
王艳梅
王岩
李艳莹
杨艳红
迟玉贤
金晶
牛淑云
HU Xiaoshuang WANG Yanmei WANG Yan LI Yanying YANG Yanhong CHI Yuxian JIN Jing NIU Shuyun(School of Chemistry and Chemical Engineering,Liaoning Normal University,Dalian,Liaoning 116029, China)
出处
《应用化学》
CAS
CSCD
北大核心
2017年第4期486-488,共3页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金资助项目(21133005)
辽宁省教育厅一般项目(L2014424
L2011193)~~
关键词
Ln(Ⅲ)配聚物
晶体结构
近红外发光
Ln ( Ⅲ ) coordination polymer
crystal structure
near infrared luminescence