Qin Jun-Sheng, Zhang Shu-Ran, Du Dong-Ying, Shen Ping, Bao Shao-Juan, Lan Ya-Qian, Su Zhong-Min
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).
Chemistry. 2014 May 5;20(19):5625-30. doi: 10.1002/chem.201304480. Epub 2014 Mar 27.
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.
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。