Two novel mixed Eu3+/Y3+ Ln MOFs: influence of pH on the topology, Eu/Y ratio and energy transfer

被引：25

作者：

Zhang, Yu ^{[1
]}

Ju, Weiwei ^{[1
]}

Xu, Xiao ^{[1
]}

Lv, Yun ^{[1
]}

Zhu, Dunru ^{[1
]}

Xu, Yan ^{[1
]}

机构：

[1] Nanjing Tech Univ, Coll Chem & Chem Engn, State Key Lab Mat Oriented Chem Engn, Nanjing 210009, Jiangsu, Peoples R China

来源：

CRYSTENGCOMM | 2014年 / 16卷 / 25期

关键词：

METAL-ORGANIC FRAMEWORK; COORDINATION POLYMERS; LUMINESCENT PROPERTIES; TUNABLE EMISSION; MOLECULES; PHOTOLUMINESCENCE; FLUORESCENCE; COMPLEXES; FAMILY; TB3+;

D O I：

10.1039/c4ce00513a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Two interesting mixed Eu3+/Y3+ lanthanide metal-organic frameworks, formulated as [EuY2(H2O)(6)(IN)(3)(ox)(3)].H2O (1) and Eu3.5Y4.5(mu(2)-OH)(8)(IN)(8)(ox)(4) (2) (HIN = isonicotinic acid; H(2)ox = oxalic acid), have been hydrothermally synthesized under the same initial reaction conditions except pH values. Such mixed Ln MOFs which contain two types of ligands are quite novel, and the pH value largely affects the topologies and Eu/Y ratios of the two compounds. Compound 1 exhibits a two-dimensional (2D) layered structure which is built up of [Ln(2)IN(2)](4+) units connected by oxalate ligands with a Eu/Y ratio of about 1 : 2, while in 2, the 2D Ln-ox metal-organic layers are connected by IN- ligands to give rise to a 3D framework with a Eu/Y ratio of about 1 : 1.3. Moreover, the photoluminescence properties of the two compounds indicate that fluorescence intensity of 1 is much greater than that of 2 due to the different levels of energy transfer and coordination environment.

引用

页码：5681 / 5688

页数：8

共 43 条

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