Wang Chih-Chieh, Yi Wei-Cheng, Huang Zi-Ling, Chang Tsai-Wen, Chien Wen-Chi, Tseng Yueh-Yi, Chen Bo-Hao, Chuang Yu-Chun, Lee Gene-Hsiang
Department of Chemistry, Soochow University, Taipei 11102, Taiwan.
National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan.
Polymers (Basel). 2020 Sep 27;12(10):2222. doi: 10.3390/polym12102222.
Two coordination polymers (CPs), with chemical formulas {[Ni(bpp)(BT)(HO)] 1.5(EtOH) 1.5HO} () and [Zn(bpp)(BT)]·5HO () (bpp = 1,3-bis(4-pyridyl)propane, and BT = tetraanion of 1,2,4,5-Benzenetetracarboxylic acid), have been synthesized and structurally characterized by single-crystal X-ray diffraction methods. In compound , the coordination environments of two crystallographically independent Ni(II) ions are both distorted octahedral bonded to two nitrogen donors from two bpp ligands and four oxygen donors from one BT ligand and three water molecules. Both bpp and BT act as bridging ligands with -monodentate and 1,4--monodentate coordination modes, respectively, connecting the Ni(II) ions to form a 2D layered metal-organic framework (MOF). Adjacent 2D layers are then arranged orderly in an ABAB manner to complete their 3D supramolecular architecture. In , the coordination environment of Zn(II) ion is distorted tetrahedral bonded to two nitrogen donors from two bpp ligands and two oxygen donors from two BT ligands. Both bpp and BT act as bridging ligands with -monodentate and 1,2,4,5--monodentate coordination modes, respectively, connecting the Zn(II) ions to form a 3D MOF. The reversible water de-/adsorption behavior of between dehydrated and rehydrated forms has been verified by cyclic Thermogravimetric (TG) analyses through de-/rehydration processes. Compound also exhibits significant water vapor hysteresis isotherms.
已合成了两种配位聚合物（CPs），其化学式分别为{[Ni(bpp)(BT)(H₂O)]₁.₅(EtOH)₁.₅H₂O}（）和[Zn(bpp)(BT)]·5H₂O（）（bpp = 1,3 - 双（4 - 吡啶基）丙烷，BT = 1,2,4,5 - 苯四甲酸的四价阴离子），并通过单晶X射线衍射方法对其进行了结构表征。在化合物中，两个晶体学独立的Ni(II)离子的配位环境均为扭曲的八面体，与来自两个bpp配体的两个氮供体、来自一个BT配体的四个氧供体以及三个水分子键合。bpp和BT均作为桥连配体，分别以 - 单齿和1,4 - 单齿配位模式连接Ni(II)离子，形成二维层状金属有机框架（MOF）。相邻的二维层然后以ABAB方式有序排列，以完成其三维超分子结构。在中，Zn(II)离子的配位环境为扭曲的四面体，与来自两个bpp配体的两个氮供体和来自两个BT配体的两个氧供体键合。bpp和BT均作为桥连配体，分别以 - 单齿和1,2,4,5 - 单齿配位模式连接Zn(II)离子，形成三维MOF。通过脱水/再水化过程的循环热重（TG）分析验证了在脱水和再水化形式之间的可逆水脱附/吸附行为。化合物还表现出显著的水蒸气滞后等温线。
