Syntheses, structures, luminescent and gas adsorption properties of five new interpenetrated, 2D and 3D metal–organic frameworks based on a semi-rigid bis(imidazole)-carbazole ligand. (14th December 2015)

• Record Type: Journal Article
• Authors: Zhang, Shu-Fang; Xiong, Fang; He, Zhan; Liang, Yue; Xue, Jun-Ru; Jing, Lin-Hai; Qin, Da-Bin
• Is Part Of: Polyhedron. Volume 102(2015)
• Page Start: 401
• Page End: 409
• Publication Date: 2015-12-14
• Subjects: Interpenetrated/2D/3D metal–organic frameworks -- Semi-rigid diimidazole ligand -- Rigid/flexible dicarboxylates -- Luminescent properties -- Gas adsorption; Chemistry, Inorganic -- Periodicals; Chimie inorganique -- Périodiques; Organometaalverbindingen; Anorganische chemie; 546.05
• DOI: 10.1016/j.poly.2015.08.040
• Languages: English
• ISSNs: 0277-5387

Abstract

Graphical abstract: Five new 2D, 3D and interpenetrated frameworks were obtained based on an semi-rigid bis(imidazole)-carbazole ligand and a series of dicarboxylic acids. The structures and properties of the resulting MOFs are mainly governed by the carboxylic acid ligands. Abstract: We have succeeded in constructing five metal–organic frameworks, [Zn(L)SO4 ] (1 ), [Zn(L)(bdc)]·H2 O (2 ), [Zn(L)(abdc)]·0.5H2 O (3 ), [Zn(L)(oba)]·2H2 O (4 ) and [Zn(L)2 (suc)2 ] (5 ), based on a semi-rigid bis(imidazole)-carbazole ligand [9-ethyl-3, 6-di(1H-imidazol-1-yl)-9H-carbazole (L)] and five rigid/flexible dicarboxylic acids (DPac = 2, 6-pyridine dicarboxylic acid, H2 bdc = p-phthalic acid, H2 abdc = azobenzen-4, 4′-dicarboxylate, H2 oba = 4, 4-oxybisbenzoic acid and H2 suc = succinic acid). Complexes1–5 were characterized by single crystal X-ray diffraction, elemental analysis, power X-ray diffraction (PXRD), IR spectroscopy and thermogravimetry. Complex1 possesses a two-dimensional (2D) network which is constructed not by the co-ligand acid but by a sulfate anion. Both complexes2 and3 are two-dimensional (2D) sheet structures with 2D → 3D polycatenation frameworks. Coordination polymer2 contains interconnected 70-membered macrocycles and3 forms a double helix-like 4-fold interpenetrated network. Complex5 exhibits a three-dimensional (3D) sra network. The luminescent properties of1 –5 in the solid state and gas adsorption properties of3 and5 were also investigated.