Anion-induced structural transformation of a sulfate-incorporated 2D Cd(II)-organic framework

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Title:	Anion-induced structural transformation of a sulfate-incorporated 2D Cd(II)-organic framework
Authors:	李勝隆;Lee, Li-Wei;Luo, Tzuoo-Tsair;Wang, Chih-Min;Lee, Gene-Hsiang;Peng, Shie-Ming;Liu, Yen-Hsiang;Lee, Sheng-Long;Lu, Kuang-Lieh
Contributors:	工學院材料科學與工程研究所
Keywords:	ADSORPTION;Anion exchange;Anion exchanging;ANIONS;AQUEOUS SOLUTIONS;Bridging;Cadmium;CADMIUM SULFATES;CRYSTAL STRUCTURE;CRYSTALS;Exchange;IMIDAZOLES;INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;INTERACTIONS;ION EXCHANGE;LAYERS;LIGANDS;SCANDIUM NITRIDES;Structural transformations;Sulfate;THIOCYANATES;Transformations;Two dimensional;WATER
Date:	2016-07-01
Issue Date:	2026-04-23 11:28:15 (UTC+8)
Publisher:	Academic Press Inc.;United States: Elsevier Inc
Abstract:	摘要： A Cd(II)–organic framework {[Cd2(tpim)4(SO4)(H2O)2]·(SO4)·21H2O}n (1) was synthesized by reacting CdSO4·8/3H2O and 2,4,5-tri(4-pyridyl)imidazole (tpim) under hydrothermal conditions. A structural analysis showed that compound 1 adopts a layered structure in which the [Cd(tpim)2]n chains are linked by sulfate anions. These 2D layers are further packed into a 3D supramolecular framework via π–π interactions. The structure contains two types of SO42− anions, i.e., bridging SO42− and free SO42− anions, the latter of which are included in the large channels of the framework. Compound 1 exhibits interesting anion exchange behavior. In the presence of SCN− anions, both the bridging and free SO42− anions in 1 were completely exchanged by SCN− ligands to form a 1D species [Cd(tpim)2(SCN)2] (1A), in which the SCN– moieties function as a monodentate ligand. On the other hand, when compound 1 was ion exchanged with N3− anions in aqueous solution, the bridging SO42− moieties remained intact, and only the free guest SO42− were replaced by N3− anions. The gas adsorption behavior of the activated compound 1 was also investigated. [Display omitted] •An interesting anion-induced structural transformation of a sulfate-incorporated 2D Cd(II)–organic framework is reported.•The sulfate-incorporated 2D layer compound exhibits very different anion exchange behavior with respect to SCN− and N3−.•Both the bridging and free SO42− anions in the 2D structure were completely exchanged by SCN− ligands, resulting in the formation of a 1D species. However, in the case of N3− anions, only the free guest SO42− in the structure was replaced. 出版者： United States: Elsevier Inc 出版日期： 2016-07-01 出處： Journal of solid state chemistry, 2016-07, Vol.239, p.1-7 版權： 2016 Elsevier Inc. 識別號： ISSN: 0022-4596 識別號： EISSN: 1095-726X 識別號： DOI: 10.1016/j.jssc.2016.03.046
Appears in Collections:	[Institute of Materials Science and Engineering] journal & Dissertation

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