系列Ln(Ⅲ)配聚物的合成、结构及近红外发光性能

doi:10.11944/j.issn.1000-0518.2017.04.160366

摘要/Abstract

摘要：

通过水热反应合成5种结构新颖的配聚物:{[Ln₂(1,3-bdc)₃(H₂O)₄](DMF(H₂O}_n[Ln=Pr(1),Nd(2),Gd(3)]和{[Ln₄(1,3-bdc)₆(H₂O)₄(DMF)](DMF(2H₂O}_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。

关键词: Ln(Ⅲ)配聚物, 晶体结构, 近红外发光

Abstract:

Five novel Ln(Ⅲ) coordination polymers, {[Ln₂(1,3-bdc)₃(H₂O)₄](DMF(H₂O}_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-bdc^2- in crystals. Except for coordination polymer 4, others exhibit NIR luminescent properties that are associated with UV-Vis-NIR absorption spectra.

Key words: Ln(Ⅲ) coordination polymer, crystal structure, near infrared luminescence

胡晓双, 王艳梅, 王岩, 李艳莹, 杨艳红, 迟玉贤, 金晶, 牛淑云. 系列Ln(Ⅲ)配聚物的合成、结构及近红外发光性能[J]. 应用化学, 2017, 34(4): 486-488.

HU Xiaoshuang, WANG Yanmei, WANG Yan, LI Yanying, YANG Yanhong, CHI Yuxian, JIN Jing, NIU Shuyun. Syntheses, Structures and Near Infrared Luminescence of a Series of Ln(Ⅲ) Coordination Polymers[J]. Chinese Journal of Applied Chemistry, 2017, 34(4): 486-488.

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