校園頭條

【研究發展處訊】

化學系王志傑教授發表最新期刊論文

Reversible Single-Crystal-to-Single-Crystal Structural Transformation in a Mixed-Ligand 2D Layered Metal-Organic Framework: Structural Characterization and Sorption Study

作者：Chih-Chieh Wang, Szu-Yu Ke, Kuan-Ting Chen, Yi-Fang Hsieh, Tzu-Heng Wang, Gene-Hsiang Lee, Yu-Chun Chuang

CRYSTALS

卷：7  期：12  文獻號碼：364

出版日期：2017年12月(SCI)

摘要：

A 3D supramolecular network, [Cd(bipy)(C₄O₄)(H₂O)₂]·3H₂O (1) (bipy = 4,4′-bipyridine and C₄O₄²⁻ = dianion of H₂C₄O₄), constructed by mixed-ligand two-dimensional (2D) metal-organic frameworks (MOFs) has been reported and structurally determined by the single-crystal X-ray diffraction method and characterized by other physicochemical methods. In 1, the C₄O₄²⁻ and bipy both act as bridging ligands connecting the Cd(II) ions to form a 2D layered MOF, which are then extended to a 3D supramolecular network via the mutually parallel and interpenetrating arrangements among the 2D-layered MOFs. Compound 1 shows a two-step dehydration process with weight losses of 11.0% and 7.3%, corresponding to the weight-loss of three guest and two coordinated water molecules, respectively, and exhibits an interesting reversible single-crystal-to-single-crystal (SCSC) structural transformation upon de-hydration and re-hydration for guest water molecules. The SCSC structural transformation have been demonstrated and monitored by single-crystal and X-ray powder diffraction, and thermogravimetic analysis studies.

Keywords

coordination polymer; metal-organic framework; SCSC structural transformation; hydrogen bond; gas sorption

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