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一种用于传感镧系(III)离子发光及通过离子交换选择性吸收染料的微孔阴离子金属有机框架。

A microporous anionic metal-organic framework for sensing luminescence of lanthanide(III) ions and selective absorption of dyes by ionic exchange.

作者信息

Qin Jun-Sheng, Zhang Shu-Ran, Du Dong-Ying, Shen Ping, Bao Shao-Juan, Lan Ya-Qian, Su Zhong-Min

机构信息

State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012 (P.R. China); Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun 130024 (P.R. China).

出版信息

Chemistry. 2014 May 5;20(19):5625-30. doi: 10.1002/chem.201304480. Epub 2014 Mar 27.

Abstract

Herein, a novel anionic framework with primitive centered cubic (pcu) topology, [(CH3 )2 NH2 ]4 [(Zn4 dttz6 )Zn3 ]⋅15 DMF⋅4.5 H2 O, (IFMC-2; H3 dttz=4,5-di(1H-tetrazol-5-yl)-2H-1,2,3-triazole) was solvothermally isolated. A new example of a tetranuclear zinc cluster {Zn4 dttz6 } served as a secondary building unit in IFMC-2. Furthermore, the metal cluster was connected by Zn(II) ions to give rise to a 3D open microporous structure. The lanthanide(III)-loaded metal-organic framework (MOF) materials Ln(3+) @IFMC-2, were successfully prepared by using ion-exchange experiments owing to the anionic framework of IFMC-2. Moreover, the emission spectra of the as-prepared Ln(3+) @IFMC-2 were investigated, and the results suggested that IFMC-2 could be utilized as a potential luminescent probe toward different Ln(3+) ions. Additionally, the absorption ability of IFMC-2 toward ionic dyes was also performed. Cationic dyes can be absorbed, but not neutral and anionic dyes, thus indicating that IFMC-2 exhibits selective absorption toward cationic dyes. Furthermore, the cationic dyes can be gradually released in the presence of NaCl.

摘要

在此,通过溶剂热法分离出一种具有原始面心立方(pcu)拓扑结构的新型阴离子框架,即[(CH3 )2 NH2 ]4 [(Zn4 dttz6 )Zn3 ]⋅15 DMF⋅4.5 H2 O(IFMC-2;H3 dttz = 4,5-二(1H-四唑-5-基)-2H-1,2,3-三唑)。四核锌簇{Zn4 dttz6 }的一个新例子作为IFMC-2中的二级结构单元。此外,金属簇通过Zn(II)离子连接,形成三维开放微孔结构。由于IFMC-2的阴离子框架,通过离子交换实验成功制备了负载镧系元素(III)的金属有机框架(MOF)材料Ln(3+) @IFMC-2。此外,对所制备的Ln(3+) @IFMC-2的发射光谱进行了研究,结果表明IFMC-2可作为针对不同Ln(3+)离子的潜在发光探针。另外,还测试了IFMC-2对离子染料的吸收能力。IFMC-2可以吸收阳离子染料,但不能吸收中性和阴离子染料,这表明IFMC-2对阳离子染料具有选择性吸收。此外,在NaCl存在下,阳离子染料可以逐渐释放。

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