Weak interactions in imidazole-containing zinc(II)-based metal-organic frameworks

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Title:	Weak interactions in imidazole-containing zinc(II)-based metal-organic frameworks
Authors:	Wu, HW (Wu, Hsin-Wei) Lee, LW (Lee, Li-Wei) Thanasekaran, P (Thanasekaran, Pounraj) Su, CH (Su, Cing-Huei) Liu, YH (Liu, Yen-Hsiang) Chin, TM (Chin, Tsung-Mei) Lu, KL (Lu, Kuang-Lieh)
Contributors:	化學系
Keywords:	coordination mode metal-organic frameworks structure weak interactions zinc
Date:	2020-07
Issue Date:	2020-10-30 14:18:52 (UTC+8)
Abstract:	The self-assembly of the two zinc(II) metal-organic frameworks, [Zn-2(L)(bdc)(2)]center dot 3MeOH center dot 4H(2)O}(n)(1, L=2-(pyridin-4-yl)-3H-imidazo[4,5-c]pyridine, H(2)bdc = 1,4-benzenedicarboxylic acid) and [Zn-2(L)(bdc)(2)]center dot 2DMF center dot H2O}(n)(2), was achieved under mild reaction conditions. Both compounds1and2were structurally characterized by single-crystal X-ray diffraction analysis. Interestingly, the coordination modes of the ligand L in two structures are entirely different. Compounds1and2were made up of paddle wheel-shaped {Zn-2(O2C)(4)} secondary building unit (SBU) clusters, which adopted three-dimensional structures with apcutopology. Rich weak interactions were observed in the structures of both1and2. The uncoordinated imidazole and pyridine moieties exhibited electron donor-acceptor interactions, pi-pi stacking, hydrogen bonding, and CH-pi interactions. These interactions also facilitated the abilities of the framework to adsorb CO(2)molecules. Gas adsorption studies revealed that compound1selectively adsorbed CO2(131.1 cm(3)/g) over N-2(23.5 cm(3)/g) and H-2(36.5 cm(3)/g) at a pressure of 1 atm.
Relation:	JOURNAL OF THE CHINESE CHEMICAL SOCIETY 早期取閱: JUL 2020
Appears in Collections:	[Department of Chemistry & Graduate Institute of Applied Chemistry ] journal articles

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