校園頭條

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化學系王志傑特聘教授發表期刊論文

Synthesis, Structures, and Water Adsorption of Two Coordination Polymers Constructed by M(II) (M = Ni (1) and Zn (2)) with 1,3-Bis(4-Pyridyl)Propane (bpp) and 1,2,4,5-Benzenetetracarboxylate (BT4-) Ligands

作者：Chih-Chieh Wang, Wei-Cheng Yi, Zi-Ling Huang, Tsai-Wen Chang, Wen-Chi Chien, Yueh-Yi Tseng, Bo-Hao Chen, Yu-Chun Chuang, and Gene-Hsiang Lee

POLYMERS (SCI)

卷冊：12 期：10

文獻號碼：2222

出版日期：Oct. 2020

Abstract

Two coordination polymers (CPs), with chemical formulas {[Ni-2(bpp)(2)(BT)(H2O)(6)] 1.5(EtOH) 1.5H(2)O}(n) (1) and [Zn(bpp)(BT)(0.5)]center dot 5H(2)O (2) (bpp = 1,3-bis(4-pyridyl)propane, and BT4- = tetraanion of 1,2,4,5-Benzenetetracarboxylic acid), have been synthesized and structurally characterized by single-crystal X-ray diffraction methods. In compound 1, 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 BT4- ligand and three water molecules. Both bpp and BT4- act as bridging ligands with bis-monodentate and 1,4-bis-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 2, 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 BT4- ligands. Both bpp and BT4- act as bridging ligands with bis-monodentate and 1,2,4,5-tetrakis-monodentate coordination modes, respectively, connecting the Zn(II) ions to form a 3D MOF. The reversible water de-/adsorption behavior of 1 between dehydrated and rehydrated forms has been verified by cyclic Thermogravimetric (TG) analyses through de-/rehydration processes. Compound 1 also exhibits significant water vapor hysteresis isotherms.

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