Pillared-bilayer zinc(ii)-organic laminae: pore modification and selective gas adsorption

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题名:	Pillared-bilayer zinc(ii)-organic laminae: pore modification and selective gas adsorption
作者:	李勝隆;Lee, Li-Wei;Luo, Tzuoo-Tsair;Lo, Sheng-Han;Lee, Gene-Hsiang;Peng, Shie-Ming;Liu, Yen-Hsiang;Lee, Sheng-Long;Lu, Kuang-Lieh
贡献者:	工學院材料科學與工程研究所
日期:	2015-07-09
上传时间:	2026-04-23 11:41:27 (UTC+8)
出版者:	Royal Society of Chemistry
摘要:	摘要： Three porous metal-organic frameworks, namely {[Zn 2 (azpy)(aip) 2 ]·2DMF} n ( 1 , azpy = 4,4′-azobipyridine, H 2 aip = 5-aminoisophthalic acid), {[Zn 2 (dipytz)(aip) 2 ]·1.15DMF·0.85MeOH} n ( 2 , dipytz = di-3,6-(4-pyridyl)-1,2,4,5-tetrazine) and {[Zn 2 (tpim)(aip) 2 ]·2.5DMF·2H 2 O} n ( 3 , tpim = 2,4,5-tri(4-pyridyl)imidazole), were synthesized under mild conditions. All of the compounds consisted of a honeycomb-like layer, [Zn(aip)] n , further pillared by N-donor ligands to form two-dimensional (2D) porous pillared-bilayer frameworks with 1D channels created inside the bilayers (4.1 × 10.1 Å 2 for 1 , 4.1 × 11.1 Å 2 for 2 , and 5.1 × 9.8 Å 2 for 3 ). The resulting MOFs showed different pore volumes and channel shapes depending on the length and shape of the pillar ligands (35.7%, 41.7%, and 33.9% for 1-3 , respectively). The pore volume in 3 decreased due to the presence of the uncoordinated pyridyl group of the tpim ligand. The frameworks of 1 and 2 show flexible properties upon undergoing solvent-exchange processes and their CO 2 adsorption properties are different. These latter properties are affected by the functional groups of the linear pillar ligand (-N&z.dbd;N- and tetrazine group). In particular, compound 3 possesses less flexibility upon undergoing a solvent-exchange process and preferentially absorbs CO 2 more efficiently rather than H 2 and N 2 . Three Zn( ii )-based pillared-bilayer MOFs were systematically synthesized. Their unusual structural characteristics allow these pillared-bilayer MOFs to serve as excellent models for studies of gas adsorption properties. 出版日期： 2015-08-10 資源來源： Royal Society of Chemistry 識別號： EISSN: 1466-8033 識別號： DOI: 10.1039/c5ce00923e
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